Diffusion-limited fluorescence quenching of ZnTPP(1S1) and quinone (benzoquinone BQ and chloranil CA) have been studied in toluene and acetonitrile at 5, 25 and 45 °C. The steady-state and time-domain experimental studies indicate that the ‘optimum’ electron-transfer distance is larger by 3–5 Å for the ZnTPP–CA reaction than that in the ZnTPP–BQ reaction.
G. B. Dutt and N. Periasamy, J. Chem. Soc., Faraday Trans., 1991, 87, 3815 DOI: 10.1039/FT9918703815
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