Ultrafast and long-time excited state kinetics of an NIR-emissive vanadium(<scp>iii</scp>) complex I: synthesis, spectroscopy and static quantum chemistry
Matthias Dorn, Jens Kalmbach, Pit Boden, Ayla Kruse, Chahinez Dab, Christian Reber, Gereon Niedner‐Schatteburg, Stefan Lochbrunner, Markus Gerhards, Michael Seitz, Katja Heinze
Abstract
'-dipyridine-2-yl-pyridine-2,6-diamine) shows near-infrared singlet → triplet spin-flip phosphorescence maxima at 1102, 1219 and 1256 nm with a lifetime of 0.5 μs at room temperature. Band splitting, ligand deuteration, excitation energy and temperature effects on the excited state dynamics will be discussed on slow and fast timescales using Raman, static and time-resolved photoluminescence, step-scan FTIR and fs-UV pump-vis probe spectroscopy as well as photolysis experiments in combination with static quantum chemical calculations. These results inform future design strategies for molecular materials of Earth-abundant metal ions exhibiting spin-flip luminescence and photoinduced metal-ligand bond homolysis.