Filtern
Dokumenttyp
- Zeitschriftenartikel (5)
- Vortrag (1)
- Sonstiges (1)
- Preprint (1)
- Forschungsbericht (1)
Schlagworte
- BOS (4)
- Characterization (3)
- KMU (3)
- Safety (3)
- Security (3)
- Black phosphorus (2)
- Netzwerk (2)
- Quality assurance (2)
- Advanced material (1)
- Advanced surface characterization (1)
Organisationseinheit der BAM
Eingeladener Vortrag (wissenschaftliche Konferenzen)
- nein (1)
Projektupdate InnoBOSK 2022
(2021)
Im Rahmen des Innovationsforums InnoBOSK soll eine engere Vernetzung zwischen KMU und Endanwendern im Bereich der zivilen Sicherheitstechnologie und -forschung erreicht werden. Aktuell ist dieser Zugang und eine umfassende Markterkundung mit Erhebung der Forschungsbedarfe und Fähigkeitslücken für KMU aufgrund der Struktur der Endanwender-Landschaft in Deutschland mit eigenen Ressourcen kaum zu leisten. Das Innovationsclusters Zivile Sicherheitsforschung (InCluSiF) soll um ein Netzwerk von KMU ergänzt werden. Auf diese Weise werden Fehlentwicklungen, „Lösungen ohne tatsächliches Problem“ und Fehlinvestitionen vermieden. Durch das Innovationsforum wird auch das gegenseitige Verständnis verbessert, und so ein schnellerer undzielgerichteter Innovationsprozess ermöglicht.
In dieser Präsentation werden die Ergebnisse des Projektes InnoBOSK gebündelt sowie die geplante Projektverstetigung vorgestellt.
Innovative Lösungen im Bereich der zivilen Sicherheitstechnologie müssen sehr genau auf die Ansprüche der Endanwender*innen abgestimmt werden. Das vom Bundesministerium für Bildung und Forschung (BMBF) geförderte Innovationsforum InnoBOSK der Bundesanstalt für Materialforschung und -prüfung (BAM) ermöglicht erstmalig die Vernetzung von Behörden und Organisationen mit Sicherheitsaufgaben (BOS) mit kleinen und mittleren Unternehmen (KMU). Während verschiedener Workshops, einer zweitägigen Konferenz und auf der digitalen Plattform des Projekts können Anbieter*innen und Endanwender*innen technischer Ausstattung in der zivilen Gefahrenabwehr in Kontakt treten.
Im Projekt InnoBOSK wurden insgesamt vier wissenschaftlich basierte Bedarfserhebungsworkshops durchgeführt. Die Workshops hatten jeweils thematische Schwerpunkte und wurden mit Vertretern unterschiedlicher BOS (Behörden und Organisationen mit Sicherheitsaufgaben) durchgeführt.
In der vorliegenden Arbeit werden die erhobenen Bedarfe ausgewertet.
Scalable covalently functionalized black phosphorus hybrids for broadspectrum virucidal activity
(2025)
At the onset of viral outbreaks, broad-spectrum antiviral materials are crucial before specific therapeutics become available. We report scalable, biodegradable black phosphorus (BP) hybrids that provide mutation-resilient virucidal protection. BP sheets, produced via an optimized mechanochemical process, are covalently functionalized with 2-azido-4,6-dichloro- 1,3,5-triazine to form P=N bonds. Fucoidan, a sulfated polysaccharide with intrinsic antiviral activity, and hydrophobic chains are then incorporated to achieve irreversible viral deactivation. The material exhibits strong antiviral inhibition and complete virucidal activity against multiple viruses, including recent severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) variants. It maintains high biocompatibility, remains effective against viral mutations, and is shelf stable for at least five month. The combination of biodegradability, scalable synthesis, and synergistic antiviral and virucidal mechanisms establishes BP-conjugates as a new class of highly efficient antivirals. They offer a broad spectrum antiviral solutions that could bridge the gap between antiviral medicines and general antiseptics.
Controllable covalent surface functionalization of black phosphorus (BP) remains a central challenge in the development of 2D phosphorus‐based materials. Here, we report a scalable route to synthesize biodegradable BP‐polymer hybrids and establish optimal conditions for BP production, exfoliation, and covalent modification. BP sheets, produced via optimized mechanochemical and exfoliation processes, are covalently functionalized with 2‐azido‐4,6‐dichloro‐1,3,5‐triazine via a nitrene‐mediated [2+1] cycloaddition. The reaction yields a P‐N bond, verified by advanced surface analyses and density functional theory (DFT) calculations. The conjugated triazine groups enable subsequent nucleophilic aromatic substitution reactions, providing a versatile platform for controlled post‐modification of BP surface. This covalent functionalization strategy addresses key limitations in BP surface chemistry and provides a route toward biodegradable phosphorus‐based hybrid materials. As a representative example, functionalization with linear polyglycerol sulfate produces BP‐polymer conjugates that inhibit respiratory syncytial virus (RSV) and herpes simplex virus 1 (HSV‐1) at low‐microgram‐per‐milliliter concentrations.
Hexacyanotrimethylenecyclopropane (CN6CP) is an exceptionally strong organic electron acceptor in its neutral form, and widely applied for molecular doping to induce charge transfer processes and enable electrochemical systems. Yet, its fundamental molecular properties have remained largely unknown. Here, we show the first comprehensive structure‐analytical characterization of CN6CP, enabled by an improved, low‐temperature synthesis and the first solid‐state structure of the neutral compound. The resulting procedure affords isolable, crystalline CN6CP that is stable for weeks at –30°C and can be recrystallised. Across all redox states, combined IR/Raman, UV–Vis and NMR measurements, together with NICS calculations, reveal an oxidation‐state‐dependent redistribution of electron density. These data show that CN6CP possesses a σ‐aromatic cyclopropane core with tunable π‐delocalisation, which is enhanced upon reduction while the additional charge is predominantly localised on the exocyclic acceptor framework. Cyclic voltammetry experiments unveil two reversible one‐electron processes and an exceptionally low LUMO energy of –5.85 eV, which is the lowest reported for small organic molecules being significantly lower than those of benchmark acceptors such as F4TCNQ or F6TCNNQ. All together, these findings establish CN6CP as a structurally unique, extremely strong electron acceptor and provide the molecular basis underlying its performance in organic electronics and redox‐active materials.
We report the synthesis, structural characterization, and optoelectronic properties of a highly electron‐deficient bi(cyclopropylidene)‐framework (CN8CP2). The developed one‐pot synthesis gives access to the dianionic species via thermally induced homocoupling of an iodinated precursor. The controlled oxidation yields the radical anion, whereas the neutral molecule is accessible only as an electrochemically generated in situ species. Single‐crystal X‐ray diffraction studies of the dianion reveal molecular layers separated by counterions, thereby enabling fluorescence in the solid state. The structure of the radical anion reveals a highly ordered arrangement of π‐stacked molecules. Optical spectroscopy and quantum chemical calculations indicate that the vibronic fine structure is governed by the vibrational modes of the cyclopropane core. The analysis of the electronic structures confirms extensive spin delocalization for the radical anion and a pronounced σ‐aromatic character. The exceptionally low energy levels of the acceptor orbitals are determined as −5.66 eV for the radical anion and −6.18 eV for the neutral species. Consequently, charge transfer to the neutral molecule or the radical anion results in the formation of the closed‐shell dianion, which circumvents instabilities that are associated with open‐shell species formed for conventional electron acceptors. Thus, CN8CP2 appears as one of the strongest small‐molecule organic acceptors for advanced organic electronic materials.
The functionalization of a hexa-peri-benzocoronene–fluoranthene hybrid with a K-type bay region is investigated. Bromination proceeds regioselectively at two peripheral positions, which contradicts the electronic and structural predictions suggesting that substitution at the K-type bay region should be favored. Computational studies reveal that the transition state and intermediate energies for all substitution positions are comparable, though no substitution in the bay region is observed. To rationalize this unexpected regioselectivity, a model is proposed based on dynamic helical inversion, which prevents the corresponding Wheland intermediates from being stabilized. Subsequent conversion of the brominated compounds to nitrile derivatives affords compounds with photoluminescence quantum yields of up to 76% in solution. Organic light-emitting diodes with luminance values of up to 6,500 cd·m–2 are realized due to the effective energy level alignment by a hole-transport and electron-blocking layer, which was not possible with the related nonfunctionalized derivative.
