✦ LIBER ✦
Photooxygenation of stilbenes in zeolite by excitation of their contact charge transfer complexes with oxygen
✍ Scribed by Haruhiko Takeya; Yasunao Kuriyama; Masanobu Kojima
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 208 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Contact charge transfer (CCT) complexes of trans-stilbenes with oxygen molecules were formed in zeolite NaY. Excitation of the CCT bands by a 313-nm wavelength light produced the corresponding benzaldehydes through an electron transfer reaction to generate stilbene cation radicals and superoxide anion radical. Irradiation of the CCT complexes by a 254-nm wavelength light, by contrast, gave rise to isomerization and formation of phenanthrene without yielding any oxygenation products, as in the photoreaction under oxygen in solution.