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Quenching of 9,10-dichloroanthracene (DCA) fluorescence by primary or tertiary amines in acetonitrile solution results in formation of DCAradical anions, amine radical cations and triplet DCA, which were observed by nanosecond flash photolysis. In n-hexane, only the triplet-triplet absorption of DCA is observed. Rate constants of back electron transfer from the solvent separated radical ion pair (SSRIP), kbet, were calculated from the quantum yields of charge separation and triplet state formation by assuming a rate of 5_108 s-1 for ion separation from the SSRIP. The rate constants kbet follow the trends expected from the electron transfer theory (inverted Marcus region). Proton transfer from radical cation of primary amine to the radical anion of DCA, occurring in the contact radical ion pair (CRIP) has been found to be the decisive step for photodehalogenation in n-hexane. Importance of the heavy atom effect has been discussed on the basis of photophysical scheme, describing the processes occurring in the CRIP (SSRIP). It has been found, that lithium perchlorate catalyses the photodechlorination of DCA in acetonitrile solution, due to acceleration of the charge separation and retardation of the recombination of formed radical ion pair.
Wydawca
Czasopismo
Rocznik
Tom
Strony
427--439
Opis fizyczny
Bibliogr. 27 poz., rys.
Twórcy
autor
- Faculty of Chemistry, Jagiellonian University, 30-060 Kraków, Ingardena 3, Poland, mac@chemia.uj.edu.pl
Bibliografia
- 1. Davidson R.S., Goodwin J.W. and Kemp G., Adv. Phys. Org. Chem., 20, 191 (1984).
- 2. Fulara J. and Latowski T., Polish J. Chem., 64, 369 (1990).
- 3. NagamuraT.,NakayamaT. and Hamanoue K., Chem. Phys. Lett., 193,30 (1992).
- 4. Hamanoue K., Nakayama T., Ikenaga K. and Ibuki K., J. Phys. Chem., 96, 10297 (1992).
- 5. Hamanoue K., Nakayama T., Ikenaga K., Ibuki K. and Otani A., J. Photochem. Photobiol., 69, 305 (1993).
- 6. Nakayama T., Hanada T., Ibuki K. and Hamanoue K., Chem Phys. Lett., 209, 367 (1993).
- 7. Mac M., Najbar J. and Wirz J., Chem. Phys. Lett., 35, 187(1995).
- 8. Okada T., Mori T. and Mataga N., Bull. Chem. Soc. Jpn., 49, 3398 (1976).
- 9. Okada T., Karaki I. and Mataga N., J. Am. Chem. Soc., 104, 7191 (1982).
- 10. Lewis F.D., Acc. Chem. Res., 19, 401 (1986).
- 11. Lewis F.D., Zebrowski B.E. and Correa P.E., J. Am. Chem. Soc., 106, 187(1984).
- 12. Lippert E., Nägele W., Seibold-Blankensteinl., Steiger U. and Voss W., Z.Anal. Chem., 170,1 (1964).
- 13. Hasler E., Hörmann A., Persy G., Platsch H. and Wirz J., J. Am. Chem. Soc., 115, 5400 (1993).
- 14. Scaiano J., Handbook of Organic Photochemistry, Boca Raton, 1989, CRC Press, Chapter 18.
- 15. Kikuchi K., Hoshi H., Niwa T., Takahashi Y. and Miyashi T., J. Phys. Chem., 95, 38 (1991).
- 16. Lewis F.D., Reddy G.D., Bassani D., Schneider S. and Gahr M., J. Photochem. Photobiol. A: Chem., 65, 205 (1992).
- 17. Lippert E., Z. Naturforsch., 109, 541 (1955); Mataga N., Kaifii Y. and Koizumi M., Bull. Chem. Soc. Jpn., 29,465 (1956).
- 18. Landolt-Bömstein, Zahlenwerte und Funktionen aus Physik, Chemie, Astronomie, Geophysik und Technik, Berlin, 1959, Vol. 6 and 8, Springer Verlag.
- 19. Gould I.R., Young R.H., Mueller L.J. and Farid S., J. Am. Chem. Soc., 116,8176(1994).
- 20. Kikuchi K., Niwa T., Takahashi Y., Ikeda H., Miyashi T. and Hoshi M., Chem. Phys. Lett., 173, 421 (1990).
- 21. Gould I.R., Young R.H. and Farid S., Photochemical Processes in Organized Molecular Systems, BV, 1991, p. 19-40, K. Honda editor, Elsevier Science Publishers.
- 22. Mac M., Kwiatkowski P. and Turek A.M., J. Luminesc., 65, 341 (1996).
- 23. Mac M., Kwiatkowski P. and Turek A.M., Chem. Phys. Lett., 250, 104 (1996).
- 24. Mac M. and Wirz J., Photochem. Photobiol Sci., 1,27 (2002).
- 25. Matay J. and Vandenhof A.M., Top. Curr. Chem., 159,220 (1991).
- 26. Mac M., J. Luminesc., 81, 33 (1999).
- 27. Ciorboli C., Indelli M.T.,. Scandola M.A.R. and Sc
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ1-0023-0104