TY - GEN A1 - Knorr, Monika A1 - Schmidt, Peer T1 - Reactivity of ionic liquids: Reductive effect of [C4C1im]BF4 to form particles of red amorphous selenium and Bi2Se3 from oxide precursors T2 - ChemistryOpen N2 - Temperature-induced change in reactivity of the frequently used ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([C4C1im]BF4) is presented as a prerequisite for the rational screening of reaction courses in material synthesis. [C4C1im]BF4 becomes active with oxidic precursor compounds in reduction reaction at ϑ > 200°C, even without the addition of an external reducing agent. The reaction mechanism of forming red amorphous selenium from SeO2 is investigated as a model system and can be described similarly to the Riley oxidation. The reactive species but-1-ene, which is formed during the decomposition of [C4C1im]BF4, reacts with SeO2 and form but-3-en-2-one, water, and selenium. Elucidation of the mechanism was achieved by thermoanalytical investigations. The mono-tropic phase transition of selenium was analyzed by the differential scanning calorimetry. Beyond, the suitability of the single source oxide precursor Bi2Se3O9 for the synthesis of Bi2Se3 particles was confirmed. Identification, characterization of formed solids succeeded by using light microscopy, XRD, SEM, and EDX. KW - Ionic liquid KW - Thermal analysis KW - Thermal decomposition KW - Chalcogenides KW - Selenium KW - Inorganic synthesis Y1 - 2021 UR - https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/open.202000264 U6 - https://doi.org/10.1002/open.202000264 SN - 2191-1363 VL - 10 IS - 2 SP - 125 EP - 140 ER - TY - GEN A1 - Vinokurova, Ekaterina A1 - Knorr, Monika A1 - Efimova, Anastasia A1 - Ovchinnikov, Alexander A1 - Schmidt, Peer A1 - Büchner, Bernd A1 - Isaeva, Anna A1 - Roslova, Maria T1 - Microstructural evolution of layered K-doped RuCl3 during annealing traced by thermogravimetric analysis and 3D electron diffraction T2 - Zeitschrift für Anorgische und Allgemeine Chemie N2 - Nanoscale phase separation was induced in the K-doped RuCl3 van der Waals material by annealing, and studied with the goal to find a natural design strategy for the formation of two-dimensional architectures as an alternative to the costly and time-consuming experimental artificial growth methods. Phase conversion was traced by means of thermogravimetric analysis combined with mass spectrometry. The local crystal structure of co-existing K3Ru2Cl9 domains with the sizes of about 100 nm was solved by 3D electron diffraction. KW - 2D layered compounds KW - Chemical vapor transport KW - Crystal growth KW - Crystal structure KW - Halides KW - Thermal analysis Y1 - 2023 UR - https://onlinelibrary.wiley.com/doi/full/10.1002/zaac.202300141 U6 - https://doi.org/10.1002/zaac.202300141 SN - 0044-2313 SN - 1521-3749 VL - 649 IS - 19 SP - 1 EP - 8 ER -