標題: | Classification of dynamic vibronic couplings in vibrational real-time spectra of a thiophene derivative by few-cycle pulses |
作者: | Kobayashi, Takayoshi Wang, Zhuan Otsubo, Tetsuo 電子物理學系 Department of Electrophysics |
公開日期: | 20-十二月-2007 |
摘要: | Pump-probe spectroscopy was performed with a few cycle pulses of 6.7 fs duration. The electronic transition intensity modulation was induced by molecular vibration in a quinoid thiophene molecule in solution. The real-time vibrational features were analyzed in terms of dependence of vibrational amplitude and phase on probe photon energy. The electronic transition probability is modulated by molecular vibration via vibronic coupling. Changes in the spectral shape and intensity of the time-resolved spectrum were studied by tracking characteristic spectral features including the peak frequency and intensity, spectral bandwidth, and band-integrated intensity. From the analysis the modulation mechanisms were classified into two groups: (1) Condon type and (2) non-Condon type. The features of the wave packet motions were also classified into zeroth-order derivatives due to quasi-pure non-Condon type and first- and second-order derivative types due to the displacement of the potential minimum and the potential curvature change associated with the relevant vibronic transition, respectively. |
URI: | http://dx.doi.org/10.1021/jp076750d http://hdl.handle.net/11536/10001 |
ISSN: | 1089-5639 |
DOI: | 10.1021/jp076750d |
期刊: | JOURNAL OF PHYSICAL CHEMISTRY A |
Volume: | 111 |
Issue: | 50 |
起始頁: | 12985 |
結束頁: | 12994 |
顯示於類別: | 期刊論文 |