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The Action of Light on Dyes
Author(s) -
BOWEN E. J.
Publication year - 1949
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1949.tb02538.x
Subject(s) - diradical , photochemistry , chemistry , radical , singlet state , reactive intermediate , singlet fission , excited state , molecule , absorption (acoustics) , triplet state , materials science , organic chemistry , atomic physics , catalysis , physics , composite material
Excited singlet levels of dye molecules formed by absorption of light may pass to triplet or “diradical” levels, which may be chemically more reactive. Many of the photoreactions of dyes have been formally interpreted as “electron transfer” reactions, but details of the prooess are usually obscure, especially in regard to the relative parts played by the singlet and triplet levels, the states of ionisation of the radicals formed, and the intervention of reactive species such as O 2 , HO 2 and OH. It is suggested that experiments to bring out the properties of the triplet levels would be helpful for further understanding of dye photoreactions.