Dynamics of Electron Transfers in Photosensitization Reactions of Zinc Porphyrin Derivatives.

ABSTRACT: Photocatalytic systems for CO₂ reduction operate via complicated multi-electron transfer (ET) processes. A complete understanding of these ET dynamics can be challenging but is key to improving the efficiency of CO₂ conversion. Here, we report the ET dynamics of a series of zinc porphyrin derivatives (ZnPs) in the photosensitization reactions where sequential ET reactions of ZnPs occur with a sacrificial electron donor (SED) and then with TiO₂. We employed picosecond time-resolved fluorescence spectroscopy and femtosecond transient absorption (TA) measurement to investigate the fast ET dynamics concealed in the steady-state or slow time-resolved measurements. As a result, Stern-Volmer analysis of fluorescence lifetimes evidenced that the react

SUBMITTER: Kim S 

PROVIDER: S-EPMC9822303 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature