@misc{OstersNilgesSchoeneichetal., author = {Osters, Oliver and Nilges, Tom and Sch{\"o}neich, Michael and Schmidt, Peer and Rothballer, Jan and Pielnhofer, Florian and Weihrich, Richard}, title = {Cd4Cu7As, the first representative of a fully ordered, orthorhombically distorted MgCu2 Laves phase}, series = {Inorganic Chemistry}, volume = {51}, journal = {Inorganic Chemistry}, issn = {1520-510X}, doi = {10.1021/ic3005213}, pages = {8119 -- 8127}, abstract = {The ternary Laves phase Cd4Cu7As is the first intermetallic compound in the system Cu-Cd-As and a representative of a new substitution variant for Laves phases. It crystallizes orthorhombically in the space group Pnnm (No. 58) with lattice parameters a = 9.8833(7) {\AA}; b = 7.1251(3) {\AA}; c = 5.0895(4) {\AA}. All sites are fully occupied within the standard deviations. The structure can be described as typical Laves phase, where Cu and As are forming vertex-linked tetrahedra and Cd adopts the structure motive of a distorted diamond network. Cd4Cu7As was prepared from stoichiometric mixtures of the elements in a solid state reaction at 1000 °C. Magnetic measurements are showing a Pauli paramagnetic behavior. During our systematical investigations within the ternary phase triangle Cd-Cu-As the cubic C15-type Laves phase Cd4Cu6.9(1)As1.1(1) was structurally characterized. It crystallizes cubic in the space group Fd3m̅ with lattice parameter a = 7.0779(8) {\AA}. Typically for quasi-binary Laves phases Cu and As are both occupying the 16c site. Chemical bonding, charge transfer and atomic properties of Cd4Cu7As were analyzed by band structure, ELF, and AIM calculations. On the basis of the general formula for Laves phases AB2, Cd is slightly positively charged forming the A substructure, whereas Cu and As represent the negatively charged B substructure in both cases. The crystal structure distortion is thus related to local effects caused by Arsenic that exhibits a larger atomic volume (18 {\AA}3 compared to 13 {\AA}3 for Cu) and higher ionicity in bonding.}, language = {en} } @misc{ScholzDaoQuocSchmidt, author = {Scholz, Tanja and Dao Quoc, Huong and Schmidt, Peer}, title = {Phase barograms - phased diagrams of vapour pressure: Eutectoid Phase Formation in Binary Systems}, series = {Thermochimica Acta}, volume = {541}, journal = {Thermochimica Acta}, doi = {10.1016/j.tca.2012.04.022}, pages = {1 -- 7}, abstract = {Phase barograms are specific representations of conventional (x, T) phase diagrams considering the vapor pressure as additional thermodynamic parameter. Thus, the determination of the vapor pressure is complementary to conventional DTA or DSC measurements. A stringent relationship between the phase diagram and the corresponding phase barogram is derived by thermodynamic considerations of phase relations for complex heterogeneous equilibria. For that purpose, a derivative of the three-dimensional Clausius-Clapeyron equation is utilized. As a result, a validation of DTA/DSC measurements becomes feasible by the transformation of characteristic effects of vapor pressure measurements into thermal effects in conventional phase diagrams. The system CsBr/SeO2 is presented as a case study of systems with a eutectoid phase formation. CsSeO2Br is formed from the binaries at ϑf = 180(5) °C; the compound decomposes peritectically at ϑp = 470(10) °C.}, language = {en} } @misc{GuentherBeckmannSchoeneichetal., author = {G{\"u}nther, David and Beckmann, Jens and Sch{\"o}neich, Michael and Schmidt, Peer and Klepel, Olaf}, title = {Porous concrete as a template for the synthesis of porous carbon materials}, series = {Carbon}, volume = {50}, journal = {Carbon}, number = {8}, issn = {0008-6223}, doi = {10.1016/j.carbon.2012.02.039}, pages = {3092 -- 3116}, abstract = {The potential of industrial porous concrete for using as a template for the synthesis of porous carbon materials has been investigated. Carbon replicas of porous concrete have been prepared by carbonization of sucrose. The pores of the resulting carbon materials range from the macropore to the micropore region, pointing to a hierarchy.}, language = {en} } @misc{SchmidtSchoeneichBawohletal., author = {Schmidt, Peer and Sch{\"o}neich, Michael and Bawohl, Melanie and Nilges, Tom and Weihrich, Richard}, title = {Thermal analysis detecting equilibrium conditions: The use of the high temperature gas balance for thermogravimetric measurements}, series = {Journal of Thermal Analysis and Calorimetry}, volume = {110}, journal = {Journal of Thermal Analysis and Calorimetry}, number = {3}, issn = {1572-8943}, doi = {10.1007/s10973-011-2107-3}, pages = {1511 -- 1521}, abstract = {Several methods are established in thermal analysis to investigate phase formation, phase transition, and decomposition reactions. The analysis of phase equilibria with volatile components is particularly feasible by using standard method of thermogravimetry. Hardly any investigations of phase formation reactions are possible to realize if one of the components is lost by vaporization. By using the "High-Temperature Gas-Balance" (HTGB), the vapor phase is enclosed in a silica ampoule and thus forms an equilibrium gas phase in permanent contact with the solid phase. The measurement signal Δmmeas is caused by change of the leverage of the horizontal balance support during evaporation and condensation. The application of the HTGB allows the analysis of solid-gas equilibria in the working range from 0.01 till 15 bar at temperatures up to 1,100 °C. The first comparison of evaporation reactions determined by standard thermogravimetric analyses and by measurements using the HTGB is given for the inorganic systems: P, As, SeO2, PtI2, and Hg/I.}, language = {en} } @misc{OstersNilgesBachhuberetal., author = {Osters, Oliver and Nilges, Tom and Bachhuber, Frederik and Pielnhofer, Florian and Weihrich, Richard and Sch{\"o}neich, Michael and Schmidt, Peer}, title = {Synthesis and Identification of Metastable Compounds: Black Arsenic—Science or Fiction?}, series = {Angewandte Chemie / International edition}, volume = {51}, journal = {Angewandte Chemie / International edition}, number = {12}, issn = {1521-3773}, doi = {10.1002/anie.201106479}, pages = {2994 -- 2997}, abstract = {Back in black: All metastable and stable phases can be identified for the solid solution arsenic/phosphorus by a combination of quantum-chemical calculations and investigations of the phase formation. Reaction paths for phase formations and transitions in situ were also evaluated. The results show that orthorhombic black arsenic (o-As) is metastable in pure form and has only been previously obtained by stabilizing impurities.}, language = {en} } @misc{RudorfSchmidt, author = {Rudorf, Wolfram W. and Schmidt, Peer}, title = {Studies on synthetic galloalunites AGa3(SO4)2(OH)6: Synthesis, Thermal analysis, and X-ray characterization}, series = {Thermochimica Acta}, volume = {521}, journal = {Thermochimica Acta}, number = {1-2}, doi = {10.1016/j.tca.2011.04.013}, pages = {112 -- 120}, abstract = {Stoichiometric end member galloalunites of the general formula AGa3(SO4)2(OH)6, with A = Na+, K+, Rb+, H3O+, and NH4+ have been synthesized under hydrothermal conditions. These galloalunites were characterized by chemical methods, thermal analysis (DSC, TG coupled with mass spectroscopy), and powder X-ray diffraction (XRD). The stages of thermal decomposition of sodium, potassium and rubidium galloalunite show a common decomposition mechanism forming β-Ga2O3 and A2SO4 (A = Na+, K+, and Rb+) while ammonium and oxonium galloalunite decompose under formation of pure β-Ga2O3. The thermogravimetric results confirmed the analytical results on the galloalunites and thereby verified the stoichiometry of these synthetic products. Galloalunites with different monovalent cations in A site (i.e. Na+, K+, Rb+, H3O+ and NH4+) crystallize in the rhombohedral space group R-3m (\#166). The effects of substitution on the unit cell parameters are rationalized in terms of the structural arrangements in galloalunites. The unit cell parameter c increases with increasing effective ionic radii of the cation in the A site, whereas the parameter a changes to a much lesser degree.}, language = {en} } @misc{ZhangHerklotzHieckmannetal., author = {Zhang, Xi and Herklotz, Frank and Hieckmann, Ellen and Weber, J{\"o}rg and Schmidt, Peer}, title = {Vapor phase growth of ZnO single crystals}, series = {Journal of Vacuum Science and Technology : A}, volume = {29}, journal = {Journal of Vacuum Science and Technology : A}, doi = {10.1116/1.3553461}, pages = {03A107}, abstract = {Zinc oxide is a promising wide band gap semiconductor for future optoelectronic devices. Today ZnO bulk single crystals are grown by three different techniques: hydrothermally, from the melt, and by chemical vapor transport. For our studies, the authors employed in addition a simple and low cost vapor phase method which gives us good quality crystals and flexibility in crystal doping. The as-grown needle-shaped single crystals were characterized by resistivity measurements, scanning electron microscopy, electron backscatter diffraction, and low temperature photoluminescence spectroscopy.}, language = {en} } @misc{TschulikHoffmannFokwaetal., author = {Tschulik, Kristina and Hoffmann, Stefan and Fokwa, Boniface P. T. and Gilleßen, Michael and Schmidt, Peer}, title = {Studies regarding the homogeneity range of the zirconium phosphide telluride Zr2+xPTe2}, series = {Solid State Sciences}, volume = {12}, journal = {Solid State Sciences}, number = {12}, issn = {1293-2558}, doi = {10.1016/j.solidstatesciences.2010.08.022}, pages = {2030 -- 2035}, abstract = {The phosphide tellurides Zr2+δPTe2 (0 ≤ δ ≤ 1) can be synthesized from the elements in a solid state reaction or by thermal decomposition of Z. Zr2PTe2 decomposes under release of Te2(g) + P4(g) forming the homogeneity range Zr2+δPTe2. The growth of single crystals of Zr2+δPTe2 succeeded by chemical vapour transport using iodine as transport agent from 830 °C in direction of higher temperatures up to 900 °C. Zr2+δPTe2 crystallizes in the rhombohedral space group R-3m (no. 166) with lattice parameters a = 383(1)…386(1) pm and c = 2935(4)…2970(4) pm for δ = 0…1, respectively. Single crystal data have been determined for Zr2.40(2)PTe2 with lattice parameters a = 385.24(4) pm and c = 2967.8(4) pm. The electronic structure and chemical bonding in Zr2+δPTe2 was investigated by the linear muffin-tin orbital (LMTO) method. Both Zr2PTe2 and Zr3PTe2 show non-vanishing DOS values at the Fermi level (EF) indicating metallic character. According to COHP bonding analyses, mainly the heteroatomic Zr-P and Zr-Te bonds are responsible for the structural stability of Zr3PTe2. The new Zr2-Te bond, which is not present in Zr2PTe2, is stronger than Zr1-Te and is thought to be responsible for the stability of phases having Zr in excess.}, language = {en} } @misc{JahnBlaudeckBaumannetal., author = {Jahn, Stephan F. and Blaudeck, Thomas and Baumann, Reinhard R. and Jakob, Alexander and Ecorchard, Petra and R{\"u}ffer, Tobias and Lang, Heinrich and Schmidt, Peer}, title = {Inkjet Printing of Conductive Silver Patterns by Using the First Aqueous Particle-Free MOD Ink without Additional Stabilizing Ligands}, series = {Chemistry of Materials}, volume = {22}, journal = {Chemistry of Materials}, number = {10}, issn = {1520-5002}, doi = {10.1021/cm9036428}, pages = {3067 -- 3071}, abstract = {The chemical and physical properties of [AgO2C(CH2OCH2)3H] (3) and its use as an aqueous, ligand-free MOD ink (MOD = metal-organic decomposition) for piezo inkjet printing is discussed. The printed, thermal, or photochemical sintered silver features are electrically conductive on glass (2.7 × 107 S m-1) and PET (PET = polyethylene terephthalate) substrates (1.1 × 107 S m-1) corresponding to 43\% and 18\% of the bulk silver conductivity. Conducted tape tests show the suitability of the ink for particularly polymer substrates. TG-MS studies demonstrate a two-step decomposition for the conversion of 3 to elemental silver. The structure of 3 in the solid state was determined by single X-ray structure determination.}, language = {en} } @misc{MuellerSchwarzSchmidtetal., author = {M{\"u}ller, Carola J. and Schwarz, Ulrich and Schmidt, Peer and Schnelle, Walter and Doert, Thomas}, title = {High-Pressure Synthesis, Crystal Structure, and Properties of GdS2 with Thermodynamic Investigations in the Phase Diagram Gd-S,}, series = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie}, volume = {636}, journal = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie}, number = {6}, issn = {1521-3749}, doi = {10.1002/zaac.201000015}, pages = {947 -- 953}, abstract = {Gadolinium disulfide was prepared by high-pressure synthesis at 8 GPa and 1173 K. It crystallizes in the monoclinic space group P121/a1 (No. 14) with lattice parameters a = 7.879(1) {\AA}; b = 3.936(1) {\AA}, c = 7.926(1) {\AA} and β = 90.08(1)°. The crystal structure is a twofold superstructure of the aristotype ZrSSi and consists of puckered cationic [GdS]+ double slabs that are sandwiched by planar sulfur sheets containing S22- dumbbells. The thermal decomposition of GdS2 proceeds via the sulfur-deficient polysulfides GdS1.9, GdS1.85 and GdS1.77 and eventually results in the sesquisulfide Gd2S3. GdS2 is a paramagnetic semiconductor which orders antiferromagnetically at TN = 7.7(1) K. A metamagnetic transition is observed in the magnetically ordered state.}, language = {en} } @misc{JahnJakobBlaudecketal., author = {Jahn, Stephan F. and Jakob, Alexander and Blaudeck, Thomas and Schmidt, Peer and Lang, Heinrich and Baumann, Reinhard R.}, title = {Inkjet printing of conductive patterns with an aqueous solution of [AgO2C(CH2OCH2)3H] without any additional stabilizing ligands}, series = {Thin Solid Films}, volume = {518}, journal = {Thin Solid Films}, number = {12}, issn = {0040-6090}, doi = {10.1016/j.tsf.2010.01.030}, pages = {3218 -- 3222}, abstract = {The use of silver(I)-2-[2-(2-methoxyethoxy)ethoxy]acetate, [AgO2C(CH2OCH2)3H], and its application as an aqueous metal-organic decomposition (MOD) inkjet ink is reported. The chemical and physical properties of the silver carboxylate and the ink formulated thereof are discussed. The ink meets all requirements of piezo driven inkjet printing. The printed features were converted into electrically conducting silver patterns by thermal or photo-thermal treatment. The conversion of [AgO2C(CH2OCH2)3H] to elemental silver follows a two-step decomposition as demonstrated by thermogravimetry-mass spectrometry (TG-MS) measurements. The measured conductivities of the printed features on glass and polyethylene-terephthalate (PET) are 2.7 × 107 S m-1 and 1.1 × 107 S m-1, respectively, which correspond to 43\% (glass) and 18\% (PET) of the bulk silver conductivity.}, language = {en} } @misc{BenndorfHohmannSchmidtetal., author = {Benndorf, Christopher and Hohmann, Andrea and Schmidt, Peer and Eckert, Hellmut and Johrendt, Dirk and Sch{\"a}fer, Konrad and P{\"o}ttgen, Rainer}, title = {2D 31P Solid state NMR spectroscopy, electronic structure and thermochemistry of PbP7}, series = {Journal of Solid State Chemistry}, volume = {235}, journal = {Journal of Solid State Chemistry}, doi = {10.1016/j.jssc.2015.12.028}, pages = {139 -- 144}, abstract = {Phase pure polycrystalline PbP7 was prepared from the elements via a lead flux. Crystalline pieces with edge-lengths up to 1 mm were obtained. The assignment of the previously published 31P solid state NMR spectrum to the seven distinct crystallographic sites was accomplished by radio-frequency driven dipolar recoupling (RFDR) experiments. As commonly found in other solid polyphosphides there is no obvious correlation between the 31P chemical shift and structural parameters. PbP7 decomposes incongruently under release of phosphorus forming liquid lead as remainder. The thermal decomposition starts at T>550 K with a vapor pressure almost similar to that of red phosphorus. Electronic structure calculations reveal PbP7 as a semiconductor according to the Zintl description and clearly shows the stereo-active Pb-6s2 lone pairs in the electron localization function ELF.}, language = {en} } @misc{SchmidtEfimova, author = {Schmidt, Peer and Efimova, Anastasia}, title = {Thermal Characterization of Ionic Liquids}, series = {OnSet : News, Facts and Professional Solutions for Thermal Analysis}, volume = {15}, journal = {OnSet : News, Facts and Professional Solutions for Thermal Analysis}, pages = {14 -- 17}, abstract = {Ionic liquids (ILs) are currently of high interest due to their high performance physicochemical properties over a wide tempera¬ture range of existence of the liquid state. Among the ionic liquids investigated, 1-alkyl- 3-methylimidazolium halides were found generally preferred for their low melting points and ease of handling and preparation.}, language = {en} } @misc{HeinemannSchmidt, author = {Heinemann, Robert and Schmidt, Peer}, title = {Thermodynamic analysis of crystal growth of zinc oxide}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {642}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {18}, issn = {1521-3749}, doi = {10.1002/zaac.201690018}, pages = {1064}, abstract = {Chemical vapor transport (CVT[1]) is a suitable method for production of single-crystals of high purity. In order to find proper strategies for CVT various tools of thermodynamic calculations and analysis of solid-gas equilibria are available. Those applications are demonstrated for vapor transport of zinc oxide under addition of phosphorous and water.}, language = {en} } @misc{PfisterSchaeferOttetal., author = {Pfister, Daniela and Sch{\"a}fer, Konrad and Ott, Claudia and Gerke, Birgit and P{\"o}ttgen, Rainer and Janka, Oliver and Baumgartner, Maximilian and Efimova, Anastasia and Hohmann, Andrea and Schmidt, Peer and Venkatachalam, Sabarinathan and W{\"u}llen, Leo van and Sch{\"u}rmann, Ulrich and Kienle, Lorenz and Duppel, Viola and Parzinger, Eric and Miller, Bastian and Becker, Jonathan and Holleitner, Alexander and Weihrich, Richard and Nilges, Tom}, title = {Inorganic double helices in semiconducting SnIP}, series = {Advanced Materials}, volume = {28}, journal = {Advanced Materials}, number = {44}, issn = {1521-4095}, doi = {10.1002/adma.201603135}, pages = {9783 -- 9791}, abstract = {SnIP is the first atomic-scale double helical semiconductor featuring a 1.86 eV bandgap, high structural and mechanical flexibility, and reasonable thermal stability up to 600 K. It is accessible on a gram scale and consists of a racemic mixture of right- and left-handed double helices composed by [SnI] and [P] helices. SnIP nanorods <20 nm in diameter can be accessed mechanically and chemically within minutes.}, language = {en} } @misc{SchoeneichHohmannSchmidtetal., author = {Sch{\"o}neich, Michael and Hohmann, Andrea and Schmidt, Peer and Pielnhofer, Florian and Bachhuber, Frederik and Weihrich, Richard and Osters, Oliver and K{\"o}pf, Marianne and Nilges, Tom}, title = {Element allotropes and polyanion compounds of pnicogenes and chalcogenes: stability, mechanisms of formation, controlled synthesis and characterization}, series = {Zeitschrift f{\"u}r Kristallographie - Crystalline Materials}, volume = {232}, journal = {Zeitschrift f{\"u}r Kristallographie - Crystalline Materials}, number = {1-3}, issn = {2194-4946}, doi = {10.1515/zkri-2016-1966}, pages = {91 -- 105}, abstract = {The application of the EnPhaSyn (theoretical Energy diagrams, experimental Phase formation, Synthesis and characterisation) concept is reviewed with respect to prediction of structures and stability of element allotropes and compound polymorphs, their phase formation and transition processes, and their directed synthesis, respectively. Therein, the relative energetical stability (En) of target compounds and possible decomposition are determined from quantum chemical DFT calculations. Phase formation and transition (Pha) is probed by a gas balance method, developed as high temperature gas balance concept. It helped to study the synthesis and stability range of several compounds experimentally. Applications of the concept and synthesis principles (Syn) of non-equilibrium phases are presented for allotropes of P, As, P1-xAsx, as well as binary and ternary compounds including the Zintl and Laves like phases IrPTe, NiP2, CoSbS, NiBiSe, Li0.2CdP2, Cu3CdCuP10, and Cd4Cu7As.}, language = {en} } @misc{ZeugnerKaiserSchmidtetal., author = {Zeugner, Alexander and Kaiser, Martin and Schmidt, Peer and Menshchikova, Tatiana V. and Rusinov, Igor P. and Markelov, Anton V. and Van den Broek, Wouter and Chulkov, Evgueni V. and Doert, Thomas and Ruck, Michael and Isaeva, Anna}, title = {Modular Design with 2D Topological-Insulator Building Blocks: Optimized Synthesis and Crystal Growth and Crystal and Electronic Structures of BiₓTeI (x = 2, 3)}, series = {Chemistry of Materials}, volume = {29}, journal = {Chemistry of Materials}, number = {3}, issn = {0897-4756}, doi = {10.1021/acs.chemmater.6b05038}, pages = {1321 -- 1337}, abstract = {Structural engineering of topological bulk materials is systematically explored with regard to the incorporation of the buckled bismuth layer [Bi₂], which is a 2D topological insulator per se, into the layered BiTeI host structure. The previously known bismuth telluride iodides, BiTeI and Bi₂TeI, offer physical properties relevant for spintronics. Herewith a new cousin, Bi₃TeI (sp.gr. R3m, a = 440.12(2) pm, c = 3223.1(2) pm), joins the ranks and expands this structural family. Bi₃TeI = [Bi₂][BiTeI] represents a stack with strictly alternating building blocks. Conditions for reproducible synthesis and crystal-growth of Bi₂TeI and Bi₃TeI are ascertained, thus yielding platelet-like crystals on the millimeter size scale and enabling direct measurements. The crystal structures of Bi₂TeI and Bi₃TeI are examined by X-ray diffraction and electron microscopy. DFT calculations predict metallic properties of Bi₃TeI and an unconventional surface state residing on various surface terminations. This state emerges as a result of complex hybridization of atomic states due to their strong intermixing. Our study does not support the existence of new stacking variants BiₓTeI with x > 3; instead, it indicates a possible homogeneity range of Bi₃TeI. The series BiTeI-Bi₂TeI-Bi₃TeI illustrates the influence of structural modifications on topological properties.}, language = {en} } @techreport{SchmidtEfimova, author = {Schmidt, Peer and Efimova, Anastasia}, title = {Thermal Characterization of Ionic Liquids}, publisher = {NETZSCH-Ger{\"a}tebau GmbH}, address = {Selb}, pages = {14 -- 17}, abstract = {Ionic liquids (ILs) are currently of high interest due to their high performance physicochemical properties over a wide temperature range of existence of the liquid state. Among the ionic liquids investigated, 1-alkyl-3-methylimidazolium halides were found generally preferred for their low melting points and ease of handling and preparation.}, language = {en} } @misc{WelsSchmidt, author = {Wels, Martin and Schmidt, Peer}, title = {Crystal growth of ternary phases with homogeneity range: Modeling and experiments}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {642}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {18}, issn = {1521-3749}, doi = {10.1002/zaac.201690018}, pages = {1066}, abstract = {Synthesizing crystals of ternary solid solutions M2Q3 (M=Bi, Q=Se, Te) with definite composition requires advanced knowledge on the phase relations in the system. By chemical vapor transport [1] the request of homogeneous crystallization can be fulfilled. The experimental scope gets supported by modeling. A phase diagram of the pseudobinary system generated with FactSage [2] (Fig. 1) provides the thermodynamic parameters of the miscibility gap respectively the solid solution. Additionally, these parameters are used to optimize the processes while chemical vapor transport with iodine [3]. The optimum transport conditions of ϑsource = 500 °C and ϑsink = 450 °C has been applied as for the synthesis of the binary compounds [4]. Both by modeling and experiments the congruent transport can be demonstrated, Fig. 2.}, language = {en} } @book{Schmidt, author = {Schmidt, Peer}, title = {Allgemeine Chemie, Teil 1: Atombau und Periodensystem}, publisher = {Springer Spektrum}, address = {Heidelberg [u.a.]}, isbn = {978-3-662-47347-4}, pages = {56}, abstract = {Aufbau der Atome und die Ordnung der chemischen Elemente im Periodensystem}, language = {de} } @book{SchmidtBinnewiesFinze, author = {Schmidt, Peer and Binnewies, Michael and Finze, Maik}, title = {Anorganische Chemie, Band 2: Gruppe 2, Gruppe 13}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-47549-2}, pages = {61}, abstract = {Elemente der Gruppe 2 (Erdalkalimetalle); Elemente der Gruppe 13}, language = {de} } @book{SchmidtBinnewiesFinze, author = {Schmidt, Peer and Binnewies, Michael and Finze, Maik}, title = {Anorganische Chemie, Band 3: Gruppe 14, Ressourceneffizienz}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-47561-4}, pages = {62}, abstract = {Elemente der Gruppe 14 (Tetrele); Strategien der Ressourceneffizienz}, language = {de} } @book{SchmidtBinnewiesFinze, author = {Schmidt, Peer and Binnewies, Michael and Finze, Maik}, title = {Anorganische Chemie, Band 4: Gruppen 15 und 16}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-47565-2}, pages = {70}, abstract = {Gruppe 15 (Pnikogene); Gruppe 16 (Chalkogene)}, language = {de} } @book{SchmidtBinnewiesFinze, author = {Schmidt, Peer and Binnewies, Michael and Finze, Maik}, title = {Anorganische Chemie, Band 5: Gruppen 17 und 18}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-47547-8}, pages = {57}, abstract = {Gruppe 17 (Halogene); Gruppe 18 (Edelgase)}, language = {de} } @book{BinnewiesFinzeJaeckeletal., author = {Binnewies, Michael and Finze, Maik and J{\"a}ckel, Manfred and Schmidt, Peer and Willner, Helge and Rayner-Canham, Geoff}, title = {Allgemeine und Anorganische Chemie}, edition = {3., vollst{\"a}ndig {\"u}berarbeitetet Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-45066-6}, pages = {965}, abstract = {Der Lehrstoff der Allgemeinen und Anorganischen Chemie f{\"u}r die ersten zwei Semester des Chemiestudiums. Ausgewogene Stoffdarstellung mit vielen Einblicken in hochaktuelle Themen und Anwendungen. Mit zahlreichen neuen Inhalten und Aktualisierungen, etwa zu großtechnischen Verfahren, zur zunehmenden Bedeutung seltener Elemente wie Gallium und Indium f{\"u}r Hightech-Produkte, zu Rohstoffen f{\"u}r Zukunftstechnologien, zum Schweißen und L{\"o}ten, zu Magnetwerkstoffen und W{\"a}rmespeichern. Die Nomenklatur ist an die aktuellen IUPAC-Regeln angepasst.}, language = {de} } @book{Schmidt, author = {Schmidt, Peer}, title = {Allgemeine Chemie, Teil 2: Chemische Bindungen 1}, publisher = {Springer Spektrum}, address = {Heidelberg [u.a.]}, isbn = {978-3-662-47516-4}, pages = {54}, abstract = {Prinzipien der chemischen Bindung in Metallen und in Ionenkristallen}, language = {de} } @book{Schmidt, author = {Schmidt, Peer}, title = {Allgemeine Chemie, Teil 3: Chemische Bindungen 2}, publisher = {Springer Spektrum}, address = {Heidelberg [u.a.]}, isbn = {978-3-662-47563-8}, pages = {56}, abstract = {Konzepte zur Beschreibung der Struktur und chemischen Bindung in Molek{\"u}len}, language = {de} } @book{Schmidt, author = {Schmidt, Peer}, title = {Allgemeine Chemie, Teil 4: Thermodynamik und Kinetik}, publisher = {Springer Spektrum}, address = {Heidelberg [u.a.]}, isbn = {978-3-662-47518-8}, pages = {56}, abstract = {Thermodynamische Kenngr{\"o}ßen zu Beschreibung chemischer Gleichgewichte und zeitabh{\"a}ngige Einstellung des chemischen Gleichgewichts}, language = {de} } @book{SchmidtNilges, author = {Schmidt, Peer and Nilges, Tom}, title = {Allgemeine Chemie, Teil 5: Wissenschaftliches Arbeiten}, publisher = {Springer Spektrum}, address = {Berlin [u.a.]}, isbn = {978-3-662-47539-3}, pages = {37}, abstract = {Prinzipien des wissenschaftlichen Arbeitens und Methodik zur Erstellung von Protokollen, Kurzberichten, Projektberichten und wissenschaftlichen Publikationen}, language = {de} } @misc{SchmidtHohmannNilgesetal., author = {Schmidt, Peer and Hohmann, Andrea and Nilges, Tom and K{\"o}pf, Marianne and Weihrich, Richard}, title = {Synthesis of Element Allotropes of Arsenic and Phosphorus by Application of Electromotive Series of Solids}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {640}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {11}, issn = {1521-3749}, doi = {10.1002/zaac.201490026}, pages = {2386}, abstract = {Calculation of electromotive series of solids allows easy prediction of reaction pathways[1]. Using the electromotive series of systems As-P-O and As-P-X (X = F, Cl, Br, I) the formation of element allotropes via the oxide and halide compounds in thermite type reactions can be deduced: phosphorous will reduce the arsenic oxides to elemental arsenic, forming grey or black allotrope, depending on reaction mixture composition.}, language = {en} } @misc{WolfDoertStolzeetal., author = {Wolf, Adrian and Doert, Thomas and Stolze, Karoline and Schmidt, Peer}, title = {Modeling of Chemical Vapor Transport of Uranium Phosphide Telluride UPTe}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {640}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {11}, issn = {1521-3749}, doi = {10.1002/zaac.201490026}, pages = {2374}, abstract = {The crystallization mechanism of uranium phosphide telluride UPTe by chemical vapor transport reaction [1] is presented based on thermodynamic modelling using TRAGMIN program. Evaluation of standard data of all expected species was performed by modeling of the binary phase diagrams U/Te and U/P. Data of UPTe were deduced from known phosphide tellurides[2,3]. Identifying the viable composition area within the quaternary system U/P/Te/I the temperature depending transport equilibria could be obtained.}, language = {en} } @misc{HeinemannSchmidt, author = {Heinemann, Robert and Schmidt, Peer}, title = {Vapor Transport Investigations using the High-temperature Gas-balance}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {640}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {11}, issn = {1521-3749}, doi = {10.1002/zaac.201490026}, pages = {2338}, abstract = {The High-temperature Gas-balance (HTGB[1]) has been established as a new method for investigations of heterogeneous phase equilibria with volatile components [1,2]. This equipment is notably well suited to analyze reversible heterogeneous equilibria which occur during chemical vapor transport reactions (CVT[3]). Experimental proof has been furnished by vapor transports of germanium and germanium(II) telluride using iodine as a transport addition. Initially the sublimation of iodine has been observed (section a - Fig. 1). The formation of GeI4(g) as the actual transport agent follows (b). Finally, the transport reaction occurs under reversible formation GeI2(g) (c).}, language = {en} } @misc{Schmidt, author = {Schmidt, Peer}, title = {Rational Synthesis Design by Application of Electromotive Series of Solid Materials}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {640}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {11}, issn = {1521-3749}, doi = {10.1002/zaac.201490026}, pages = {2326}, abstract = {The concept of Electromotive Series of Solids presents an easy tool for prediction and interpretation of red-ox processes of inorganic solid materials. Thus, a rational synthesis design succeeds with low effort compared to complex thermodynamic considerations. The principle has been applied and validated for interpretation of known chemical systems as well for the development of new systems and processes.}, language = {en} } @misc{EfimovaHubrigPfuetzneretal., author = {Efimova, Anastasia and Hubrig, Grit and Pf{\"u}tzner, Linda and Schmidt, Peer}, title = {Thermal Stability of Alkyl-Imidazolium-Ionic Liquids}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {640}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {11}, issn = {1521-3749}, doi = {10.1002/zaac.201490026}, pages = {2391}, abstract = {The thermochemical behavior of two groups of ionic liquids (ILs), 1-ethyl-3-methylimidazolium [EtMeIm] and 1-butyl-3-methylimidazolium [BuMeIm] halides (Cl, Br and I) was investigated for their crystalline and liquid states in the temperature range from -100 °C to 600 °C using DSC and thermogravimetric analysis (TGA). Some investigated ILs exhibit significant subcooling effect and the glass state formation [1]. The decomposition mechanism has been identified by means of TGA with coupled mass spectrometry (MS). All investigated ILs decompose with a total mass loss of about 100 \% in the temperature range of Tonset from 230 to 290 °C (Fig. 1). By complete degradation of IL, dominant fragments CnH2n+1+, CnH2n+, CnHn+, NHn+, and the respective alkyl halides (X = Cl, Br, I) are formed.}, language = {en} } @book{SchmidtBinnewiesFinze, author = {Schmidt, Peer and Binnewies, Michael and Finze, Maik}, title = {Anorganische Chemie, Band 1: Elemente, Wasserstoff, Gruppe 1}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-47557-7}, pages = {52}, abstract = {Entstehung und Vorkommen der chemischen Elemente; periodische Eigenschaften der Elemente; Wasserstoff; Elemente der Gruppe 1 (Alkalimetalle)}, language = {de} } @misc{PielnhoferBachhuberSchmidtetal., author = {Pielnhofer, Florian and Bachhuber, Frederik and Schmidt, Peer and Nilges, Tom and Weihrich, Richard}, title = {Mit DFT-Modellierungen zu neuen Polyanionenverbindungen}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {638}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {10}, doi = {10.1002/zaac.201204137}, pages = {S. 1634}, abstract = {Verbindungen mit ionischen Baueinheiten erweisen sich als geeignete Materialien zur Energie- und Ressourcennutzung. Beispiele sind Li-Elektrodenmaterialien oder neue Thermoelektrika, die aufgrund ihrer Teilstrukturen schaltbar werden. Das Design neuer funktionaler Materialien verlangt dabei nach einem grundlegenden Verst{\"a}ndnis von Struktur-Eigenschafts-Beziehungen, metastabilen Strukturen und Umwandlungen. Dies bedarf des Einsatzes kombinierter experimenteller und theoretischer Methoden. Zur systematischen Erforschung metastabiler Strukturen wurde j{\"u}ngst das Konzept der Strukturvorhersage in Energielandschaften mit ab initio Methoden auf das System P1-xAsx angewandt und mit experimentellen Messungen verkn{\"u}pft. Im n{\"a}chsten Schritt wurden Verbindungen mit ionischen Teilstrukturen des As, Sb, Se und Te untersucht. Modellhaft wurden nun Zintl-Systemen wie IrPTe und PtSnTe neue m{\"o}gliche metastabile Strukturen identifiziert und auf Funktionalisierungen untersucht.}, language = {de} } @misc{NilgesOstersSchmidtetal., author = {Nilges, Tom and Osters, Oliver and Schmidt, Peer and Sch{\"o}neich, Michael and Weihrich, Richard and Bachhuber, Frederik}, title = {Untersuchungen zur Bildung von schwarzem Arsen}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {636}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {11}, doi = {10.1002/zaac.201008019}, pages = {S. 46}, abstract = {Das Mineralisatorkonzept f{\"u}r Polypniktide, basierend auf PbI2 als Mineralisator, wurde erfolgreich zur Synthese der festen L{\"o}sung von ortho-rhombischem, schwarzen As1-xPx eingesetzt (x = 0.17-1). Die Zellparameter von As0.83P0.17 sind identisch mit den Literaturwerten des As(schwarz). Aus Pulver- und Einkristalldaten bei variabler Zusammensetzung ist es m{\"o}glich, das Zellvolumen und die Gitterparameter von reinem, schwarzen Arsen abzuleiten. Die Analyse der Phasenbildung basiert auf der Bestimmung der Gleichgewichtsdr{\"u}cke der Intermediate Au2P3 und Asgrau sowie von PbI2 im Vergleich zu As1-xPx(schwarz): Die Kondensation erfolgt unterhalb 600 °C aus einer komplexen Gasphase (u.a. AsnP4-n).}, language = {de} } @misc{SchoeneichLorenzBawohletal., author = {Sch{\"o}neich, Michael and Lorenz, Tobias and Bawohl, Melanie and Nilges, Tom and Schmidt, Peer}, title = {Phase Formation in the System Hg/P/I Induced by Evaporation Pressure}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {636}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {11}, doi = {10.1002/zaac.201009042}, pages = {S. 2070}, language = {en} } @techreport{PinnauEfimovaSchmidt, author = {Pinnau, Sebastian and Efimova, Anastasia and Schmidt, Peer}, title = {Identifikation technischer Salze als Latentspeichermaterialien im Temperaturbereich von 4 bis 15 °C und deren Verkapselung: Abschlussbericht}, address = {Dresden}, doi = {10.2314/GBV:786966173}, pages = {92}, abstract = {Der Einsatz von thermischen Speichern erlaubt eine bessere Lastanpassung von Erzeugeranlagen zur Geb{\"a}udeklimatisierung sowie eine Optimierung des Betriebsregimes unter energetischen Gesichtspunkten. F{\"u}r solche Anwendungsf{\"a}lle k{\"o}nnen Latentw{\"a}rmespeicher zum Einsatz kommen, bei denen {\"u}blicherweise der Schmelz- und Erstarrungsvorgang sogenannter Phasenwechselmaterialien (Phase Change Materials, PCM) ausgenutzt wird. F{\"u}r die Anwendungstemperaturbereiche der Klimatisierung von etwa 4 °C bis 15 °C und f{\"u}r die K{\"u}hlung bis etwa 25 °C ist die Auswahl an Reinstoffen mit einer passenden Schmelztemperatur sehr begrenzt. Durch die Bildung von eutektischen Gemischen aus zwei oder mehr Komponenten - die {\"a}hnlich wie Reinstoffe einen scharfen Schmelzpunkt aufweisen - kann die Bandbreite an potentiellen PCM's f{\"u}r diesen Temperaturbereich vergr{\"o}ßert werden. F{\"u}r die genannten Temperaturbereiche werden vorzugsweise anorganische Salzhydrate als potentielle Speichermedien betrachtet, da diese gegen{\"u}ber organischen Substanzen h{\"a}ufig gr{\"o}ßere Schmelzenthalpien und geringere Kosten aufweisen.}, language = {de} } @misc{SchoeneichSchmidt, author = {Sch{\"o}neich, Michael and Schmidt, Peer}, title = {Kinetics of phase formation in solid - gas reactions: Iron and Arsenic}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {638}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {10}, doi = {10.1002/zaac.201204026}, pages = {S. 1579}, abstract = {Based on the experience of thermo-chemical studies on a High-Temperature Gas-Balance a time dependent analysis has been developed for the investigations of the kinetics of solid-gas reactions. The course of solid-gas reactions can be examined unambiguously by separation of the initial solids. By this setup the visualization of different stages of solid-gas reaction (vaporization, phase formation) becomes feasible. Time dependent analysis of the formation of FeAs results in an assignment of the underlying principles of kinetics derived from the conversion factor α.}, language = {en} } @misc{SchmidtSchoeneichNilgesetal., author = {Schmidt, Peer and Sch{\"o}neich, Michael and Nilges, Tom and Weihrich, Richard}, title = {Identification of Metastable States in Heterogeneous Phase Formation}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, volume = {638}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie}, number = {10}, doi = {10.1002/zaac.201204134}, pages = {S. 1633}, language = {en} } @techreport{SchmidtEfimova, author = {Schmidt, Peer and Efimova, Anastasia}, title = {Kristallisationsverhalten von Phasenwechselmaterialien als Latentw{\"a}rmespeicher (KristallLaW): Abschlussbericht}, publisher = {BTU Cottbus - Senftenberg, Fachgebiet Anorganische Chemie}, address = {Senftenberg}, doi = {10.2314/GBV:884496287}, pages = {44}, abstract = {Phasenwechselmaterialien (PCM) sind chemische Verbindungen oder deren Mischungen, die bei einer definierten Temperatur schmelzen bzw. erstarren. Der zyklische Einsatz von W{\"a}rmespeichern erm{\"o}glicht den Ausgleich von {\"U}berlasten f{\"u}r den Bedarf oder den „Abfall" von W{\"a}rme sowie die Vergleichm{\"a}ßigung von W{\"a}rmeprofilen. Bestehende anorganische Materialien weisen {\"u}berwiegend Einschr{\"a}nkungen bez{\"u}glich der Anforderungen an eine geringe Hysterese von Aufheizung und Abk{\"u}hlung auf. Das Maß der Unterk{\"u}hlung der Schmelze sowie ein zyklenstabiler W{\"a}rmeaustausch kann aber durch Zus{\"a}tze als Kristallisationshilfen (Keimbildner) gesteuert werden. Im vorliegenden Bericht werden die Keimbildung und Kristallisation von Phasenwechselmaterialien unter folgenden Gesichtspunkten diskutiert: Methoden der Thermischen Analyse zur Untersuchung der thermochemischen Eigenschaften von PCM, thermochemische Eigenschaften anorganischer Salze und Salzhydrate als PCM, dominierende Kristallstrukturen und Strukturmotive anorganischer Salze und Salzhydrate als PCM, dominierende Kristallstrukturen und Strukturmotive anorganischer Stoffe als homogener und heterogener Keimbildner, {\"A}nderung der thermochemischen Eigenschaften von PCM bei Zusatz von Keimbildnern, geeignete Konzentrationsbereiche von Keimbildnern, Homogenit{\"a}t/Segregation von Phasen.}, language = {de} } @book{BinnewiesFinzeRadiusetal., author = {Binnewies, Michael and Finze, Maik and Radius, Udo and Schmidt, Peer}, title = {Anorganische Chemie, Band 6: Nebengruppen - Teil 1}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-55904-8}, pages = {61}, abstract = {Stellung der Nebengruppenelemente im Periodensystem, Gruppeneigenschaften, Gewinnung der Metalle, die Nebengruppen (Gruppen 3 bis 12)}, language = {de} } @book{BinnewiesFinzeRadiusetal., author = {Binnewies, Michael and Finze, Maik and Radius, Udo and Schmidt, Peer}, title = {Anorganische Chemie, Band 7: Nebengruppen - Teil 2}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-55906-2}, pages = {64}, abstract = {Koordinationschemie,Konzepte der chemischen Bindung in Komplexverbindungen}, language = {de} } @book{BinnewiesFinzeRadiusetal., author = {Binnewies, Michael and Finze, Maik and Radius, Udo and Schmidt, Peer}, title = {Anorganische Chemie, Band 8: Metallorganische Chemie der {\"U}bergangsmetalle}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-56030-3}, pages = {87}, language = {de} } @book{BinnewiesFinzeRadiusetal., author = {Binnewies, Michael and Finze, Maik and Radius, Udo and Schmidt, Peer}, title = {Anorganische Chemie, Band 9: Festk{\"o}rperchemie}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-47577-5}, pages = {91}, abstract = {Beschreibung kristalliner Strukturen, Strukturen anorganischer Festk{\"o}rper und Methoden zur Synthese und Kristallz{\"u}chtung}, language = {de} } @book{BinnewiesFinzeRadiusetal., author = {Binnewies, Michael and Finze, Maik and Radius, Udo and Schmidt, Peer}, title = {Anorganische Chemie, Band 10: Lanthanoide}, edition = {1. Auflage}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-662-47543-0}, pages = {28}, abstract = {Vorkommen, Gewinnung und Verbindungen der Lanthanoide - Anwendungen der Lanthanoide und ihrer Verbindungen}, language = {de} } @misc{EfimovaVargaMatuscheketal., author = {Efimova, Anastasia and Varga, Janos and Matuschek, Georg and Saraji-Bozorgzad, Mohammad R. and Denner, Thomas and Zimmermann, Ralf and Schmidt, Peer}, title = {Thermal Resilience of Imidazolium-Based Ionic Liquids—Studies on Short- and Long-Term Thermal Stability and Decomposition Mechanism of 1-Alkyl-3-methylimidazolium Halides by Thermal Analysis and Single-Photon Ionization Time-of-Flight Mass Spectrometry}, series = {Journal of Physical Chemistry B}, volume = {122}, journal = {Journal of Physical Chemistry B}, number = {37}, doi = {10.1021/acs.jpcb.8b06416}, pages = {8738 -- 8749}, abstract = {Ionic liquids are often considered as green alternatives of volatile organic solvents. The thermal behavior of the ionic liquids is relevant for a number of emerging large-scale applications at elevated temperature. Knowledge about the degradation products is indispensable for treatment and recycling of the used ionic liquids. The objective of this paper was an investigation of the short- and long-term stability of several 1-alkyl-3-methylimidazolium halides, determination of the degradation products, and the elucidation of their decomposition patterns and structure-stability relations. Short-term stability and mechanism of thermal degradation were investigated by a self-developed, innovative thermal analysis single-photon ionization time-of-flight mass spectrometry device with Skimmer coupling. The applied technology provides real-time monitoring of the forming species and allows tracing their change during the course of the decomposition. Therein, the almost fragment-free soft ionization with vacuum ultraviolet photons plays a crucial role. We have detected unfragmented molecules whose formation was only assumed by electron ionization. Nevertheless, the main decomposition products of the selected ionic liquids were alkyl imidazoles, alkenes, alkyl halides, and hydrogen halides. From the decomposition products, we have deduced the fragmentation patterns and discussed their interrelation with the length of the alkyl chain and the type of the halide anion. Our results did not suggest the evaporation of the investigated ionic liquids prior to their decomposition under atmospheric conditions. Long-term thermal stability and applicability were determined based on thermogravimetric analysis evaluated with a kinetic model. Thus, the time-dependent maximum operation temperature (MOT) for the respective ionic liquids has been calculated. As a rule, the short-term stability overestimates the long-term decomposition temperatures; the calculated MOT are significantly lower (at least 100 K) than the standardly obtained decomposition temperatures.}, language = {en} } @incollection{NilgesSchmidtWeihrich, author = {Nilges, Tom and Schmidt, Peer and Weihrich, Richard}, title = {Phosphorus: The Allotropes, Stability, Synthesis, and Selected Applications}, series = {Encyclopedia of Inorganic and Bioinorganic Chemistry}, booktitle = {Encyclopedia of Inorganic and Bioinorganic Chemistry}, editor = {Scott, Robert A.}, edition = {2. Auflage}, publisher = {John Wiley Sons}, address = {Hoboken, US}, isbn = {978-1-119-95143-8}, doi = {10.1002/9781119951438.eibc2643}, pages = {1 -- 19}, abstract = {Phosphorus, first found in the seventeenth century, played an important role in the definition of the element term by Lavoisier and thus shaped the beginning of the era of modern chemistry. It was discovered for the first time in the most unstable crystalline modification—the white phosphorus. Today, a variety of experimentally proven allotropes are known. The most common allotropes, such as black, violet, and fibrous phosphorus, are described here with respect to their synthesis, crystal structures, thermal, and thermodynamic properties. Besides, more than 50 crystalline allotropes have been predicted, and their stabilities have been estimated using quantum-chemical methods. This way, phosphorus becomes one of the most structurally variable elements of the periodic table. In this article, some of the most reasonable and sophisticated calculations are presented. The applications of elemental phosphorus are mainly connected with its semiconducting properties. Thus, the development of current applications is strongly related to new synthesis methods for direct preparation of individual, phase pure allotropic forms of phosphorus. The past decade supplied basic results on the formation of black phosphorus and other modifications, primarily using the mineralizer concept. Related to graphene and other two-dimensional, layered structures, phosphorene is of drastically rising interest. The pertinent modifications are characterized by corrugated arrangement of six-membered P-rings, where both the boat conformation and the chair conformation are known. The application of phosphorene is in a jumping evolution. Currently, phosphorene is already in use in manifold ways, including as a sensor, optical device, transistor, energy-conversion material, and supercapacitor material.}, language = {en} } @misc{GroenkeSchmidtValldoretal., author = {Gr{\"o}nke, Martin and Schmidt, Peer and Valldor, Martin and Oswald, Steffen and Wolf, Daniel and Lubk, Axel and B{\"u}chner, Bernd and Hampel, Silke}, title = {Chemical vapor growth and delamination of α-RuCl3 nanosheets down to the monolayer limit}, series = {Nanoscale}, volume = {10}, journal = {Nanoscale}, number = {40}, issn = {2040-3372}, doi = {10.1039/C8NR04667K}, pages = {19014 -- 19022}, abstract = {2D layered honeycomb magnet α-ruthenium(III) chloride (α-RuCl3) is a promising candidate to realize a Kitaev spin model. As alteration of physical properties on the nanoscale is additionally intended, new synthesis approaches to obtain phase pure α-RuCl3 nanocrystals have been audited. Thermodynamic simulations of occurring gas phase equilibria were performed and optimization of synthesis conditions was achieved based on calculation results. Crystal growth succeeded via chemical vapor transport (CVT) in a temperature gradient of 973 K to 773 K on YSZ substrates. Single crystal sheets of high crystallinity with heights ≤ 30 nm were obtained via pure CVT. The crystal properties were characterized by means of optical and electron microscopy, AFM, SAED, micro-Raman and XPS proving their composition, morphology, crystallinity and phase-purity. A highlight of our study is the successful individualization of nanocrystals and the delamination of nanosheets on YSZ substrates down to the monolayer limit (≤ 1 nm) which was realized by means of substrate exfoliation and ultrasonication in a very reproducible way.}, language = {en} }