Abstract
The quantum yields of photooxidation of porphyrins, chlorophyll a, and β–carotene in diethyl ether in the presence of different concentrations of CCl4 in irradiation into the S 0 → S 1 absorption bands are determined. The quantum yields for deoxygenated solutions are in the range (0.001–4.200)·10−3. In the presence of oxygen, the quantum yield is increased by more than an order of magnitude and is related to the formation of the peroxyl radical CCl3O2 •. It is shown that in the initial stage of the photochemical reaction, an electron from the excited molecules of tetrapyrrole pigments in the S 1 state is transferred to the molecules of halogen derivatives of methane.
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REFERENCES
K. I. Zamaraev, R. F. Khairutdinov, and V. P. Zhdanov, Electron Tunneling in Chemistry [in Russian], Novosibirsk (1985).
M. Vacha, S. Vachida, and K. Koril, J. Phys. Chem., 99, No. 9, 13163–13167 (1995).
H. Chosrowjan, S. Tanigichi, T. Okada, et al., Chem. Phys. Lett., 242, No. 6, 644–649 (1995).
M. G. Kuz'min, in: Kinetics of Photoprocesses. Chemical and Biological Kinetics [in Russian], Moscow (1983), pp. 47–113.
V. V. Gruzinskii, V. V. Gurinovich, E. I. Sagun, and M. P. Tsvirko, Zh. Prikl. Spektrosk., 46, No. 2, 222–226 (1987).
V. V. Gurinovich and M. P. Tsvirko, Zh. Prikl. Spektrosk., 54, No. 6, 981–985 (1991).
J. Calvert and J. Pitts, in: Photochemistry [Russian translation], Moscow (1968), p. 316.
J. H. Fuhrhop and D. Mauzerall, J. Am. Chem. Soc., 91, No. 15, 4174–4181 (1969).
J. Fajer, D. C. Borg, A. Forman, D. Dolphin, and R. H. Felton, J. Am. Chem. Soc., 92, No. 11, 3451–3459 (1970).
J. H. Fuhrhop, P. Wasser, R. Riesner, and D. Mauzerall, J. Am. Chem. Soc., 94, No. 23, 7996–8001 (1972).
Z. Gasyna, W. P. Browett, and M. J. Stillman, Inorg. Chem., 23, No. 3, 382–384 (1984).
Z. Gasyna, W. P. Browett, and M. J. Stillman, Inorganica Chimica Acta, 92, No. 1, 37–42 (1984).
N. L. Lavrik, Khim. Vys. Énerg., 32, No. 5, 358–363 (1998).
V. G. Mairanovskii, in: N. S. Enikolopyan and B. D. Berezin (eds.), Porphyrins: Spectroscopy, Electrochemistry, and Application [in Russian], Moscow (1987), pp. 127–181.
J. C. D. Brand and W. Snedden, Trans. Faraday Soc., 53, No. 7, 894–900 (1957).
T. G. Truscott, J. Photochem. Photobiol., 35, No. 1, 233–235 (1996).
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Gurinovich, V.V., Tsvirko, M.P. Quantum Efficiency of Photooxidation of Porphyrins by Halomethanes in Solutions. Journal of Applied Spectroscopy 68, 110–117 (2001). https://doi.org/10.1023/A:1019273405649
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DOI: https://doi.org/10.1023/A:1019273405649