Manoj, N. ; Gopidas, K. R. (1995) Triphenylpyrylium-salt-sensitized electron transfer oxygenation of furan derivatives. Product isolation, fluorescence quenching and laser flash photolysis studies Journal of Photochemistry and Photobiology A: Chemistry, 85 (1-2). pp. 53-61. ISSN 1010-6030
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Official URL: http://www.sciencedirect.com/science/article/pii/1...
Related URL: http://dx.doi.org/10.1016/1010-6030(94)03886-Y
Abstract
The 2,4,6-triphenylpyrylium-salt-sensitized photo-oxygenation of furans 1a-1c and 2 is reported. Furans 1a-1c give the corresponding enediones 4a-4c, whereas hardly any reaction is observed for 2. Fluorescence quenching and laser flash photolysis studies indicate that the primary process is electron transfer from the furans to the singlet or triplet excited state of the pyrylium salt. The radical cations of the furans were characterized using laser flash photolysis studies. A mechanism consistent with the experimental observations is suggested for the photo-oxygenation reactions of these furans.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Triphenylpyrylium-salt; Electron Transfer Oxygenation; Furan Derivatives; Fluorescence Quenching; Laser Flash Photolysis |
| ID Code: | 62099 |
| Deposited On: | 16 Sep 2011 04:36 |
| Last Modified: | 16 Sep 2011 04:36 |
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