Conclusions
-
1.
Values have been obtained for the rate constants of radiationless deactivation of triplet exciplexes to the ground state and the distances between ion-radicals in ion-radical pairs formed in the quenching of triplet states of quinones by electron donors.
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2.
The distances between the ion-radicals in collision complexes of quinone anion-radicals and electron donor cation-radicals are only slightly dependent on the structures of the donor and acceptor in nonsolvating solvents, and amount to 10–12 A. Alcohol molecules form hydrogen bonds with the quinone anion-radicals, leading to an increase in the distance between radicals in the pair.
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3.
For the rate constants of radiationless deactivation of triplet exciplexes to the ground state, the following rule is observed: the rate constant increases with decreasing level of the energy of the triplet exciplex, i.e., with decreasing energy interval of the transition. The solvation of triplet exciplexes by alcohol molecules leads to an increase in the rate constants of deactivation of triplet exciplexes to the ground state.
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Literature cited
R. Scheerer and M. Grätzel, J. Am. Chem. Soc.,99, 865 (1977).
H. Kobashi, H. Gyoda, and T. Morita, Bull. Chem. Soc. Jpn.,50, 1731 (1977).
V. A. Kuzmin, A. P. Darmanyan, and P. P. Levin, Chem. Phys. Lett.,63, 509 (1979).
V. A. Kuz'min, A. P. Darmanyan, and P. P. Levin, Dokl. Akad. Nauk SSSR,245, 1150 (1979).
P. P. Levin, A. M. Vinogradov, A. P. Darmanyan, and V. A. Kuz'min, Dokl. Akad. Nauk SSSR,254, 1158 (1980).
P. P. Levin, A. P. Darmanyan, V. A. Kuz'min, A. Z. Yankelevich, and V. M. Kuznets, Izv. Akad. Nauk SSSR, Ser. Khim., 2744 (1980).
V. A. Kuz'min and A. K. Chibisov, Dokl. Akad. Nauk SSSR,212, 1146 (1973).
P. P. Levin, I. V. Khudyakov, and V. A. Kuz'min, Dokl. Akad. Nauk SSSR,246, 144 (1979).
R. Gachwind and E. Haselbach, Helv. Chim, Acta,62, 941 (1979).
A. M. Vinogradov, P. P. Levin, and V. A. Kuz'min, Izv. Akad. Nauk SSSR, Ser. Khim., 670 (1981).
P. P. Levin and T. A. Kokrashvili, Izv. Akad. Nauk SSSR, Ser. Khim., 1234 (1981).
J. Timmermans, The Physicochemical Constants of Binary Systems in Concentrated Solution, Interscience, New York (1959).
M. Gordon and W. R. Ware, The Exciplex, Academic Press, New York (1975).
V. É. Kampar and O. Ya. Neiland, Usp. Khim.,46, 945 (1977).
H. Masuhara, T. Hino, and N. Mataga, J. Phys. Chem.,79, 994 (1975).
N. N. Bubnov, A. I. Prokof'ev, A. A. Volod'kin, I. S. Belostotskaya, and V. V. Ershov, Dokl. Akad. Nauk SSSR,210, 100 (1973).
J. A. Barltrop and J. D. Coyle, Excited States in Organic Chemistry, Wiley-Interscience, New York (1975).
P. P. Levin, V. B. Luzhkov, and A. P. Darmanyan, Izv. Akad. Nauk SSSR, Ser. Khim., 1542 (1980).
J. Prochorow, I. Deperasinska, and A. Sobolewski, J. Lumin.,18, 105 (1979).
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 521–526, March, 1982.
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Levin, P.P., Kokrashvili, T.A. & Kuz'min, V.A. Pulse photolysis study of formation of ion-radicals in quenching of triplets of quinones by electron donors. Russ Chem Bull 31, 466–470 (1982). https://doi.org/10.1007/BF00949761
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DOI: https://doi.org/10.1007/BF00949761