Lösungsmittel-, Viskositäts-, Säure- und Substituenteneinflüsse auf die Photoisomerisierung und Relaxation symmetrischer Triazacarbocyanine bei 283 bis 323 K
✍ Scribed by Heinz Balli; Bruno Hellrung
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- German
- Weight
- 259 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Influence of Solvents, Viscosity, Acid, and Substituents on the Photoisomerization and the Relaxation of Symmetrical Triazacarbocyanine Dyes at 283 to 323 K
Photobleaching and the reverse dark reaction of seven symmetrical triazacarbocyanine dyes with different heterocycles were studied dependent on solvent effects (protic and aprotic solvents), on effects of viscosity (glycerol/EtOH mixtures), and on effects of added acid. No effects of dissolved O~2~ or added I~2~ has been observed. Kinetic data (Δ__H__^≠^, Δ__S__^≠^, and Δ__G__) of the reverse reaction are given. The effect of the substituents has been studied on two series of substituted triazacarbocyanine dyes. The mechanism of the reverse reaction is discussed.