publikace
Cationic Polyhedral Chalcogenaboranes: Activation without breaking Wade’s Rules
This study reports the first cationic chalcogenaboranes that retain the same skeletal electron pair count as their neutral counterparts, defying Wade’s rules. The ionization significantly enhances their electrophilicity, enabling reactions with very weak bases. Furthermore, it allows for regioselective control over interactions with hard and soft bases by modulating the LUMO. https://onlinelibrary.wiley.com/doi/10.1002/anie.202419677
Site-specific substitution in atomically precise carboranethiol-protected nanoclusters and concomitant changes in electronic properties
This study presents the synthesis and structural modification of a silver-based nanocluster [Ag17(o1-CBT)12]3- (Ag17) by incorporating Au and Cu at specific sites, forming AuAg16, Ag13Cu4, and AuAg12Cu4. These modifications systematically alter their structural, electronic, and optical properties, with Au stabilizing the core and Cu enhancing photoluminescence and prolonging excited-state lifetimes. The study demonstrates a tunable […]
Expanding Luminescence Horizons in Macropolyhedral Heteroboranes
The macropolyhedral compound anti-B18H22 was long thought to be the only boron hydride compound that exhibited fluorescence when illuminated with ultraviolet light. We have recently shown that new and, indeed, some previously known macropolyhedral compounds, containing sulphur or selenium, and exhibiting a wide range of structural types, possess luminescent properties. https://onlinelibrary.wiley.com/doi/full/10.1002/ange.202401872
Trace and Minor Element Analysis of Azurite Blues in Fine Arts: Possibilities and Limitations in Provenance Studies
This study investigates azurite (and malachite) pigments from important European deposits with special focus on their trace elemental composition. Using advanced analytical techniques, researchers discovered that specific trace elements, such as rare earth elements or uranium, can be key indicators of pigment provenance. These findings were applied to historical artworks, revealing that the overall trace […]
Experimental and Computational 77Se NMR Spectroscopic Study on Selenaborane Cluster Compounds
The study investigates the correlation between calculated and measured 77Se NMR chemical shifts in various selenaborane cluster compounds, showing that low-level quantum chemical calculations can reliably predict these shifts. This predictive ability helps in understanding the molecular structure of selenaboranes and efficiently locating 77Se resonances in experimental data. The findings highlight how accurate prediction of […]
Catalytic dehalogenation with activated borane, a porous borane cluster polymer
Activated borane (ActB) is a metal- and halogen-free porous borane cluster polymer that effectively serves as a heterogeneous catalyst for hydrodehalogenation of aliphatic fluorides and chlorides, using triethylsilane as a reductant. It demonstrates high thermal stability, reusability, and significant Lewis acidity, making it capable of achieving full dehalogenation with high turnover numbers, even after multiple […]
A Direct Route to closo-SBnCln Thiaboranes: Chalcogen Bonding in SB5Cl5 vs. SB11Cl11 Crystals
Polyhedral boron chemistry exhibits various heteroatom substitution and a series of heteroboranes thus being afforded Furthermore, the introduction of halogens instead of terminal hydrogens enables the synthesis of small perhalogenated heteroboranes, stabilized through π back-donation. In this research, SB5Cl5 and SB9Cl9 clusters were prepared by co-pyrolysis of B2Cl4 with S2Cl2 at 280 °C in a […]
