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LIGHT‐INDUCED SINGLE ELECTRON TRANSFER REACTIONS BETWEEN CHLOROPHYLL a AND QUINONES IN SOLUTION — III. ABSOLUTE QUANTUM YIELDS AS A FUNCTION OF TEMPERATURE AND SOLVENT *
Author(s) -
Tollin Gordon,
Chatterjee Kumar K.,
Green Gisele
Publication year - 1965
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.1751-1097.1965.tb09778.x
Subject(s) - chemistry , quantum yield , electron transfer , solvent , electron , quinone , photochemistry , analytical chemistry (journal) , atomic physics , physics , organic chemistry , quantum mechanics , fluorescence
— Absolute quantum yields for electron transfer have been determined as a function of temperature in chlorophyll a‐p ‐benzoquinone solutions in alcoholic solvents. These range, at high quinone concentrations, from about 01 electron per quantum absorbed at — 10°C, up to about 1 electron per quantum at — 110†C, and then down to zero electrons per quantum at — 196†C. The yield appears to be determined principally by solvent viscosity and dielectric constant. A mechanism is proposed to account for this and comparisons with photosynthetic electron transfer are made.