Abstract
The dependence of photoinduced radical anion formation upon exciting light intensity has been studied for glassy solutions of tetracyanobenzene (TCNB) in ether—isopentane and 2-methyl-tetrahydrofuran (MTHF) at 77 K. It has been found that in ether—isopentane glass the TCNB anion is formed biphotonically via the lowest excited triplet state of the 1:1 TCNB—ether CT complex, whereas in MTHF glass the ionic photodissociation of the TCNB—MTHF CT complex occurs monophotonically in its lowest excited singlet state.
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