| Abstract
| - The Raman and infrared bands of trans-stilbene in the ground electronic state (S0) and an excited singletstate (S1) are assigned on the basis of density functional calculations at the 6-311+G** level for the S0 stateand configuration interaction single calculations with the 6-311+G** basis set for the S1 state. Not only thewavenumbers of normal modes but also Raman activities, Raman depolarization ratios, and infrared intensitiesare calculated and used for band assignments. The vibrational patterns of some characteristic modes arediscussed. It is found that, with respect to a few low-wavenumber modes in both the S0 and S1 states, theresults of the present calculations are inconsistent with those derived from an analysis of the fluorescenceexcitation spectra and dispersed fluorescence spectra of trans-stilbene in a supersonic jet.
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