A study of vibronic structures in the optical spectra of oligo(thienylene ethynylene)s

✍ Scribed by Juan Li; Liang Liao; Yi Pang

• Publisher: Elsevier Science
• Year: 2002
• Tongue: French
• Weight: 127 KB
• Volume: 43
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)02169-4

✦ Synopsis

At the low temperature, hidden vibronic structures were successfully resolved in the absorption spectra of oligo-(thienylene ethynylene)s 2-4. Identification of the lowest energy absorption band aids the assignments of the vibronic structures in these molecules. The emission u max values were also found to be slightly red-shifted at the low temperature, indicating the adoption of a more planar conformation. The temperature-induced change in molecular conformation appeared to be dependent on the conjugation length of the molecules.