Transient Raman Study of the Low-Lying Singlet Manifold (S1 and S2) of Biphenyl
Time-resolved Raman spectrum of the S1 state of biphenyl was first reported by Kato et al. . Several vibrational frequencies were determined and assigned, and a twisted S1 tructure was suggested on the basis of a vibrational analysis . However, the broad feature in the 1300 ~ 1600 cm−1 region in the S1 Raman spectrum was left unassigned.