Solvent effect on the photochemical properties of symmetrically substituted trans-3,3',5,5'-tetramethoxystilbene.
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.
Hayakawa
Junpei
J
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
Ikegami
Masashi
M
Mizutani
Takuo
T
Wahadoszamen
Md
M
Momotake
Atsuya
A
Nishimura
Yoshinobu
Y
Arai
Tatsuo
T