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- W1990215286 abstract "Abstract Effect of concentrations of radical ion intermediates in photoinduced electron transfer (PET) reactions was examined for the redox reaction of diphenylmethyl radical. The irradiation of sym-tetraphenylacetone in the presence of aromatic donor and acceptor in MeOH–MeCN (1:9) leads to (i) the simultaneous generation of diphenylmethyl radical and a pair of radical ions, (ii) the electron transfers between them affording diphenylmethyl cation and anion, and (iii) the formation of Ph2CHOMe and Ph2CH2 by the trapping reactions with methanol. The product ratios of Ph2CH2/Ph2CHOMe are shown to be dominated by the steady-state concentrations of radical ions. Thus, pulsed irradiations resulted in quite different product ratios depending on the pulse intervals. The relative rates extrapolated to infinite, which are directly related to the intrinsic electron transfer rates with radical ions, are shown to follow the Rehm–Weller-type relationship. The importance of the persistent radical ion effect for PET reactions, just as the Ingold–Fischer persistent radical one, is discussed." @default.
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- W1990215286 date "1999-08-01" @default.
- W1990215286 modified "2023-10-18" @default.
- W1990215286 title "Effect of concentrations of radical-ion intermediates in the photochemical redox reaction of the diphenylmethyl radical" @default.
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- W1990215286 doi "https://doi.org/10.1016/s1010-6030(99)00098-2" @default.
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