Abstract
Solvation dynamics of p-methoxy-p'-cyanodiphenylacetylene was investigated by observing time-resolved fluorescence anisotropy and dynamic Stokes shift. The time-resolved anisotropy and Stokes shift were measured in the picosecond time region in n-butanol. Fluorescence spectra of p-methoxy-p'- cyanodiphenylacetylene exhibited a large Stokes shift, depending on the solvent polarity. The observed time-resolved anisotropy and Stokes shift were simultaneously analyzed with the theory based on continuum model, described in the preceding paper, by a simulation procedure of non-linear least square's method. The both decays satisfactorily fit with the theory. Obtained dipole moment in the excited state was 14 (D). The dipole moment in the ground state was negligibly small.
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