Gs. Jas et al., PICOSECOND TIME-RESOLVED FOURIER-TRANSFORM RAMAN-SPECTROSCOPY OF 9,10-DIPHENYLANTHRACENE IN THE EXCITED SINGLET-STATE, Applied spectroscopy, 49(5), 1995, pp. 645-649
Time-resolved Fourier transform Raman spectroscopy of the highly fluor
escent chromophore 9,10-diphenylanthracene (DPA) in cyclohexane and et
hanol is described. Raman spectra of the first excited singlet state o
f DPA were obtained with 100-ps resolution at several time delays betw
een pump pulses at 355 nm and probe pulses at 1064 nm. The near-infrar
ed excited-state Raman scattering is enhanced by resonance with an exc
ited-state transition of DPA. The excited-state Raman bands decay in a
bout 5-6 ns. Evidence for interaction of the solvent with the DPA exci
ted state is observed in the cyclohexane C-H stretching bands.