✦ LIBER ✦
Trans→cis photoisomerization of the quaternary iodides of 4-cyano- and 4-nitro-4′-azastilbene in ethanol solution: Singlet versus triplet mechanism
✍ Scribed by H. Görner; D. Schulte-Frohlinde
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 675 KB
- Volume
- 101
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Quantum yield measurements have been made for the tranwcis photoisomerizations of the quaternary iodides of 4cyano-and 4-nitro4'+zastilbene (CP and NP, respectively) in ethanol solution at room temperature in the presence and absence of ferrocene and azulene_ A triplet mechanism is suggested for the photoisomerization of NPand a singlet mechanism for that of CP. These mechanisms are supported by laser flash-photolysis studies of the trans triplet state of CP and NP as a function of temperature and quencher concentration.