Intra- and Intermolecular Charge-Transfer Dynamics of Carbene-Metal-Amide Photosensitizers.

ABSTRACT: A series of steady-state and time-resolved spectroscopies were performed on a set of eight carbene-metal-amide (cMa) complexes, where M = Cu and Au, that have been used as photosensitizers for photosensitized electrocatalytic reactions. Using ps-to-ns and ns-to-ms transient absorption spectroscopies (psTA and nsTA, respectively), the excited-state kinetics from light absorption, intersystem crossing (ISC), and eventually intermolecular charge transfer were thoroughly characterized. Using time-correlated single photon counting (TCSPC) and psTA with a thermally activated delayed fluorescence (TADF) model, the variation in intersystem crossing (ISC), (S₁ → T₁) rates (∼3-120 × 10⁹ s^-1), and ΔE_ST values (73-115 meV) for

SUBMITTER: Kellogg MS 

PROVIDER: S-EPMC11056983 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature