Low temperature emission spectra of trapped tetracene pairs from ditetracene

✍ Scribed by Mark A. Iannone; Gary W. Scott

• Book ID: 103025370
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 559 KB
• Volume: 171
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(90)85265-e

✦ Synopsis

Interacting pairs of tetracene molecules are prepared in a PMMA host matrix by photodecomposition of ditetracene at 15 K. Excitation and emission spectra of these pairs are red-shifted and broadened relative to those of isolated tetracene molecules under the same conditions. No differences are seen in the spectra of pairs formed fram synditetracene and from antiditetracene. The results suggest that these pairs of tetracene molecules are not in the parallel (sandwich) configuration and that a distribution of intermolecular distances and orientations is obtained. A large geometry change in the excited state, akin to excimer formation, is postulated to explain the fluorescence spectrum.