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ENERGY LEVELS IN CHLOROPHYLL AND ELECTRON TRANSFER PROCESSES*,†
Author(s) -
Nelson R C.
Publication year - 1968
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.1751-1097.1968.tb05888.x
Subject(s) - electron , excited state , molecule , yield (engineering) , chemical physics , atomic physics , chlorophyll , charge carrier , chemistry , ionization , dielectric , chlorophyll a , charge (physics) , molecular physics , photochemistry , materials science , physics , optoelectronics , ion , quantum mechanics , biochemistry , organic chemistry , metallurgy
— A brief account of the localized model for charge carrier generation in solid dyes is given, and generalized to include transfers of electrons and holes between unlike molecules. A part of the experimental basis for the localized model is the finding that the dye molecule sees its environment as a classical dielectric medium, even when it is composed of like molecules; since the effects of the environment on the ionization energy of chlorophyll are small, a close relationship can be inferred between laboratory energy levels and those effective in the chloro‐plast. The measured energy diagrams suggest a very low yield of charge carriers in either pure chlorophyll, but leave open the possibility of a substantial yield at an interface between chlorophylls a and b . The energy levels are consistent with the idea that charge carrier transfers between excited chlorophyll molecules and acceptors take place in the primary process.