Ultrafast vibrational relaxation in photogenerated S1 α-terthiophene in solution by femtosecond time-resolved absorption/emission and picosecond time-resolved Raman spectroscopy

✍ Scribed by Shoichi Yamaguchi; Hiro-o Hamaguchi

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 531 KB
• Volume: 227
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)00832-9

✦ Synopsis

Ultrafast vibrational population redistribution dynamics and subsequent cooling processes have been identified and quantitied for photogenerated St a-terthiophene in solution by using femtosecond time-resolved absorption/emission spectroscopy combined with picosecond time-resolved Raman spectroscopy. The population redistribution among the S, vibrational levels dominates the dynamics for the first few picoseconds after the photoexcitation. The cooling of the solvent-solute system then takes place in the time scale of a few tens of picoseconds.