Probing the molecular basis for solvent-induced dephasing using resonance Raman spectroscopy: betaine-30 in CH3OH, CH3OD, and CD3OD
✍ Scribed by Xihua Zhao; Jeanne L McHale
- Book ID
- 104108543
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 424 KB
- Volume
- 378
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
Absolute Raman cross-sections are reported for fourteen normal modes of betaine-30 dye in CH 3 OH, CH 3 OD, and CD 3 OD solution, at five different excitation frequencies within the visible absorption band. Consistent with previous results from our lab, the Raman intensities of betaine-30 in CD 3 OD solution are generally stronger than in CH 3 OH solution. For most of the betaine-30 normal modes, however, the resonance Raman cross-sections are similar in CH 3 OD and CH 3 OH solution. The results suggest that methyl group motion, more so than hydroxyl group motion, is responsible for dephasing of the resonant electronic transition of betaine-30 in methanol.