Abstract
Abstract The kinetics of photoinduced electron transfer and thermal recombination have been measured in a series of covalently linked donor-acceptor complexes. The molecules are based on pyrazolate-bridged iridium(I) dimers with pyridinium groups covalently bound to terminal phosphinite ligands. The driving-force dependence of the electron-transfer kinetics in one series agrees well with the predictions of the classical theory of electron transfer. The donor-acceptor electronic coupling, however, exhibits a sensitive and unexpected dependence on the nature of the bridge between the redox partners.
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