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REACTION OF RETINOL AND RETINAL WITH SINGLET OXYGEN
Author(s) -
Smith G. J.
Publication year - 1983
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1983.tb03851.x
Subject(s) - singlet oxygen , retinal , reaction rate constant , photochemistry , chemistry , retinol , oxygen , solvent , singlet state , reaction rate , kinetics , organic chemistry , excited state , catalysis , atomic physics , biochemistry , vitamin , physics , quantum mechanics
— The rate constants for the reactions of all‐ trans retinol and retinal with singlet oxygen were measured in a variety of solvents of different polarities. The rate constants increased with increasing solvent dielectric constant, which suggests that a charge transfer mechanism plays a part in the reaction. Further, the rate constant of reaction of singlet oxygen with retinal is greater than that with retinol. Since retinal has a lower ionization potential than retinol, these relative rates also support the hypothesis of charge transfer involvement in the reaction.