Electron Transfer Initiated Reactions Photoinduced by Pterins

Dynamics of Bimolecular Photoinduced Electron-Transfer Reactions

From the accumulated results of several research groups over the last 25 years, it is clear that photoinduced electron-transfer reactions have significantly broadened the scope of organic photochemistry.1 The fundamental mechanistic principle is that when quenching of an excited state via electron transfer is sufficiently exothermic, the reaction occurs at or close to the diffusion-controlled l...

ultrafast spectroscopy on bimolecular photoinduced electron transfer reactions

in Figure 1. After excitation of one of the reactants, diffusion is required to bring the reaction partners at distances where charge separation (CS) can occur. The nature of the primary quenching product is still debated.3 For weakly exergonic CS, ∆GCS > ~ -0.4 eV, it is generally accepted that the product is a contact ion pair (CIP), that is, two ions at a distance enabling a substantial over...

Nonequilibrium photoinduced electron transfer

Polythiophene derivatives by step-growth polymerization via photoinduced electron transfer reactions.

A novel method for the step-growth polymerization of diphenyldithienothiophene in the presence of diphenyliodonium salt by photoinduced electron transfer is described.

Photoinduced charge accumulation by metal ion-coupled electron transfer.

An oligotriarylamine (OTA) unit, a Ru(bpy)3(2+) photosensitizer moiety (Ru), and an anthraquinone (AQ) entity were combined to a molecular dyad (Ru-OTA) and a molecular triad (AQ-Ru-OTA). Pulsed laser excitation at 532 nm led to the formation of charge-separated states of the type Ru(-)-OTA(+) and AQ(-)-Ru-OTA(+) with lifetimes of ≤10 ns and 2.4 μs, respectively, in de-aerated CH3CN at 25 °C. U...