title: Solvent effect on the photochemical properties of symmetrically substituted trans-3,3',5,5'-tetramethoxystilbene.
abstract: Photochemical properties of trans-3,3',5,5'-tetramethoxystilbene (TMST) have been studied in various polar solvents. The Stokes shift of trans-TMST was found to be increased with increasing solvent polarity. The fluorescence lifetime of trans-TMST experienced a large solvent effect changing from 2.3 ns in cyclohexane to 16.6 ns in acetonitrile. These results indicate that the excited singlet state of trans-TMST has a charge-transfer (CT) character. On the basis of the obtained results, the interior polar environment of a water-soluble TMST dendrimer is discussed.
authors.affiliation: Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
authors.forename: Junpei
authors.initials: J
authors.lastname: Hayakawa
authors.forename: Masashi
authors.initials: M
authors.lastname: Ikegami
authors.forename: Takuo
authors.initials: T
authors.lastname: Mizutani
authors.forename: Md
authors.initials: M
authors.lastname: Wahadoszamen
authors.forename: Atsuya
authors.initials: A
authors.lastname: Momotake
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Nishimura
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Arai