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Thiapyrylium salt‐sensitized electron transfer reactions of trans ‐stilbene. Dimerization and oxygenation
Author(s) -
Akaba Ryoichi,
Kamata Masaki,
Koike Akiko,
Mogi KenIchi,
Kuriyama Yasunao,
Sakuragi Hirochika
Publication year - 1997
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/(sici)1099-1395(199711)10:11<861::aid-pca947>3.0.co;2-l
Subject(s) - chemistry , flash photolysis , tetrafluoroborate , dichloromethane , photochemistry , electron transfer , photoinduced electron transfer , radical ion , quantum yield , electrochemistry , yield (engineering) , salt (chemistry) , fluorescence , reaction rate constant , ionic liquid , catalysis , organic chemistry , kinetics , ion , electrode , solvent , physics , materials science , quantum mechanics , metallurgy
Photoinduced electron transfer reactions of trans ‐stilbene sensitized by 2,4,6‐triphenylthiapyrylium tetrafluoroborate (STPP) were carried out by steady‐state and laser flash photolysis 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. © 1997 John Wiley & Sons, Ltd.