In a previous paper [S. Iwai et al., J. Chem. Phys. 112, 7111 (2000)] we have found ultrafast electron transfer (ET) which occurs between donor and acceptor molecules at short distances. We incorporate this ultrafast ET in the calculation of the second-order ET rate in order to explain the discrepancies between experimental [D. Rehm and A. Weller, Isr. J. Chem. 8, 259 (1970)] and theoretical [M. Tachiya and S. Murata, J. Phys. Chem. 96, 8441 (1992)] ET rates. The effect of the short-distance ET is significant in the Marcus normal region where the Marcus-type ET is not very fast. Compared to the case where the original Marcus equation is used as the first-order ET rate, the calculated second-order rate is found to increase by several orders of magnitude in the normal region. Thus the discrepancy between theory and experiment is potentially resolved and the importance of the short-distance ET in fluorescence quenching demonstrated.
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15 January 2001
Research Article|
January 15 2001
Contribution of the ultrafast, short-distance intermolecular electron transfer to the fluorescence quenching rate in solution
J. Chem. Phys. 114, 1312–1318 (2001)
Article history
Received:
July 13 2000
Accepted:
October 24 2000
Citation
Shinichiro IwaiShigeo MurataM. Tachiya; Contribution of the ultrafast, short-distance intermolecular electron transfer to the fluorescence quenching rate in solution. J. Chem. Phys. 15 January 2001; 114 (3): 1312–1318. https://doi.org/10.1063/1.1333021
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