Picosecond Time-Resolved Fourier Transform Raman Spectroscopy of 9,10-Diphenylanthracene in the Excited Singlet State

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Abstract:

Time-resolved Fourier transform Raman spectroscopy of the highly fluorescent chromophore 9,10-diphenylanthracene (DPA) in cyclohexane and ethanol is described. Raman spectra of the first excited singlet state of DPA were obtained with 100-ps resolution at several time delays between pump pulses at 355 nm and probe pulses at 1064 nm. The near-infrared excited-state Raman scattering is enhanced by resonance with an excited-state transition of DPA. The excited-state Raman bands decay in about 5-6 ns. Evidence for interaction of the solvent with the DPA excited state is observed in the cyclohexane C-H stretching bands.

Keywords: Excited states; FT-Raman; Step-scan FT-Raman; Time-resolved Raman

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702953963995

Affiliations: Department of Chemistry, University of Kansas, Lawrence, Kansas 66045

Publication date: May 1, 1995

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