The webinar will be preceded by a short communication by C. Philippe (ISCR PhD student).
Felix N. Castellano abstract
Transition metal-based photosensitizers are of significant value for promoting numerous light-activated processes and chemical transformations relying on excited state electron and energy transfer reactions. Historically, the most extensively used inorganic photosensitizers have been confined to nd6 (n = 3, 4, or 5) electron configurations and their associated metal-to-ligand charge transfer (MLCT) excited states. This presentation will discuss the unique and somewhat unexpected photochemistry and photophysics in a number of distinct transition-metal containing photosensitizers derived from earth-abundant elements spanning the transition block. In some instances, ligand-to-metal charge transfer (LMCT) states dominate excited state decay, while long-lived MLCT excited states have been successfully engineered in others. These designer, earth-abundant chromophores have been implemented in a variety of photoactivation schemes harnessing photochemical upconversion to generate light, initiate free-radical polymerization chemistry, promote photoredox chemistry, and enable photocatalytic chemo-thermal energy storage schemes. Representative examples illustrating these photo-processes will be highlighted.
Coordination complexes – Photophysics – Photochemical Upconversion– Excited state dynamics - Nanocristals