PHOTOCHEMICAL cis/trans ISOMERIZATION OF AN AMPHIPHILIC MEROCYANINE DYE IN HOMOGENEOUS SOLUTION AND REVERSED MICELLES |
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| Authors: | Mahmoud H. Abdel-Kader Riyad Y. Hamzah Shakir T. Abdel-Halim |
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| Affiliation: | Faculty of Applied Science, Arabian Gulf University, P.O. Box 26671, Bahrain;Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt |
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| Abstract: | Abstract— In the present study, the photochemical cis⇌trans isomerization of the amphiphilic merocy-anine dye (4-hydroxy-l-cetyl stilbazolium betaine C16M) is reported. The structure of each isomer is established from high resolution FT 1H-NMR analysis. The photochemical quantum yields φt→c, and φc→t are determined in methanol and in reversed micelles of the system (CDBA, benzene, water). The quantum yield φc→t increases in reversed micelles compared to that in methanol. The reverse results are obtained for φt→c. The micellar effect on the photochemical trans→cis isomerization will be discussed. |
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