Excitation wavelength dependence of the Z → E one-way isomerization of 4-halostilbene radical cations in excited states

Excitation of (Z)-4-halostilbene radical cations ((Z)-XSt +; X = F, Cl, Br) around 500 or 700 nm induced their rapid one-way isomerization to the corresponding (E)-radical cations, as observed in two-color pulsed laser photolysis of (Z)- and (E)-XSt in acetonitrile containing 9,10-dicyanoanthracene...

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Published inChemical physics letters Vol. 265; no. 1; pp. 277 - 282
Main Authors Waga, Masashi, Maki, Shin-ichiro, Hashimoto, Fumiko, Sakuragi, Hirochika
Format Journal Article
LanguageEnglish
Published Elsevier B.V 31.01.1997
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Summary:Excitation of (Z)-4-halostilbene radical cations ((Z)-XSt +; X = F, Cl, Br) around 500 or 700 nm induced their rapid one-way isomerization to the corresponding (E)-radical cations, as observed in two-color pulsed laser photolysis of (Z)- and (E)-XSt in acetonitrile containing 9,10-dicyanoanthracene and biphenyl as electron-transfer sensitizers. The efficiencies of isomerization and quenching by biphenyl as electron donor are discussed on the basis of the electronic configurations and energy surfaces of the relevant excited states.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(96)01436-4