Author/Authors :
Ishibashi، نويسنده , , Taka-aki and Okamoto، نويسنده , , Hiromi and Hamaguchi، نويسنده , , Hiro-o، نويسنده ,
Abstract :
Picosecond transient infrared spectra of diphenylacetylene (DPA) were obtained in cyclohexane and acetonitrile solutions for the 1640–940 cm−1 wavenumber region, using a method based on optically heterodyned detection of absorption anisotropy. The observed transient species was assigned to the S1 state of DPA on the basis of its temporal behavior. Comparison with the reported CARS spectra suggests that S1 DPA has a planar (probably trans-bent) structure with a center of symmetry in both solutions.
