Thiapyrylium salt-sensitized electron transfer reactions of trans-stilbene. Dimerization and oxygenation

✍ Scribed by Ryoichi Akaba; Masaki Kamata; Akiko Koike; Ken-Ichi Mogi; Yasunao Kuriyama; Hirochika Sakuragi

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 151 KB
• Volume: 10
• Category: Article
• ISSN: 0894-3230
• DOI: 10.1002/(sici)1099-1395(199711)10:11<861::aid-pca947>3.0.co;2-l

✦ Synopsis

Photoinduced electron transfer reactions of trans-stilbene sensitized by 2,4,6-triphenylthiapyrylium tetrafluoroborate (STPP) were carried out by steady-state and laser flash pohtolysis techniques in the presence and absence of oxygen in dichloromethane. Rapid dimerization of the trans-stilbene cation radical with its neutral species was observed, as previously observed in 2,4,6-triphenylpyrylium tetrafluoroborate (TPP)-sensitized reactions in dichloromethane. Electrochemical and photophysical properties such as fluorescence quantum yield and T-T absorption spectrum of STPP were also studied, and the results were compared with those for TPP. The properties of STPP as an electron transfer sensitizer are discussed.