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• W1981387884 abstract "The quantum yields of cis ⇄ trans photoisomerization of 1-(1-naphthyl)-2-(4-nitrophenyl)ethylene were measured as a function of solvent polarity, concentration of quenchers (ferrocene, azulene) and temperature. The quantum yield of fluorescence of the trans isomer is small in non-polar solvents and alcohols at room temperature but shows a significant dependence on the nature of the solvent. A transient, observed by laser flash photolysis in fluid and rigid media, is assigned to the trans configuration of the lowest triplet state (3t*). At room temperature 3t* is suggested to be in rapid equilibrium with the twisted configuration (3p*). The features of the triplet state are very similar to those of 4-nitrostilbenes whereas the relaxation properties of the excited trans singlet state (1t*) are different. Based on a comparison of the effects of quenchers and temperature on the triplet lifetime (and yield) with the effects on φt→c, a triplet mechanism is proposed for the trans → cis photoisomerization at ambient temperatures. The cis → trans pathway partly involves and partly bypasses the triplet equilibrium." @default.
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• W1981387884 date "1988-06-01" @default.
• W1981387884 modified "2023-09-28" @default.
• W1981387884 title "Trans → cis photoisomerization of 1-(1-naphthyl)-2-(4-nitrophenyl)ethylene" @default.
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• W1981387884 doi "https://doi.org/10.1016/1010-6030(88)80014-5" @default.
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