Publications by authors named "G Niedner-Schatteburg"
We present an IR-PD study of tantalum cluster adsorbate complexes [Tan(N2)m]+, abbreviated (n,m), n = 5-8. We utilize infrared spectroscopy of isolated and size selected clusters as prepared and characterized by a cryogenic tandem ion trap setup, and we augment our experiments with quantum chemical simulations at the level of density functional theory. The cluster adsorbate complexes (n,m) reveal vibrational bands above 2000 cm-1, which indicate end-on coordinated μ1-N2 oscillators, and bands below 2000 cm-1, which indicate side-on μ2-κN:κN,N coordinated ones.
View Article and Find Full Text PDFWe investigate small tantalum clusters Tan+, n = 2-4, for their capability to cleave N2 adsorption spontaneously. We utilize infrared photon dissociation (IR-PD) spectroscopy of isolated and size selected clusters under cryogenic conditions within a buffer gas filled ion trap, and we augment our experiments by quantum chemical simulations (at DFT level). All Tan+ clusters, n = 2-4, seem to cleave N2 efficiently.
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- Exploring design principles for tuning the properties of transition-metal complexes is crucial in current research, particularly the effect of constitutional isomers of specific ligands.
- The study focuses on new metal complexes with linked pyridyl-MIC ligands, fully characterized by multiple analytical methods, showing enhanced photophysical properties, including significant emission in the VIS and NIR regions.
- Notably, the tungsten complex demonstrates a remarkable quantum yield of 29%, indicating its efficiency in photochemical processes, while also showing dynamic behavior when irradiated, leading to a unique metastable species and implications for further reactivity.
Dimedone and its derivates are used as selective probes for the nucleophilic detection of sulfenic acids in biological samples. Qualitative analyses suggested that dimedone also reacts with cyclic sulfenamides. Furthermore, under physiological conditions, dimedone must compete with the highly concentrated nucleophile glutathione.
View Article and Find Full Text PDFPhotoactive complexes with earth-abundant metals have attracted increasing interest in the recent years fueled by the promise of sustainable photochemistry. However, sophisticated ligands with complicated syntheses are oftentimes required to enable photoactivity with nonprecious metals. Here, we combine a cheap metal with simple ligands to easily access a photoactive complex.
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