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PHOTOCHEMICAL cis/trans ISOMERIZATION OF AN AMPHIPHILIC MEROCYANINE DYE IN HOMOGENEOUS SOLUTION AND REVERSED MICELLES
Author(s) -
AbdelKader Mahmoud H.,
Hamzah Riyad Y.,
AbdelHalim Shakir T.
Publication year - 1989
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1989.tb04314.x
Subject(s) - chemistry , isomerization , photochemistry , micelle , merocyanine , quantum yield , micellar solutions , methanol , amphiphile , benzene , photochromism , aqueous solution , organic chemistry , fluorescence , copolymer , catalysis , physics , polymer , quantum mechanics
— In the present study, the photochemical cis⇌trans isomerization of the amphiphilic merocy‐anine dye (4‐hydroxy‐l‐cetyl stilbazolium betaine C 16 M) is reported. The structure of each isomer is established from high resolution FT 1 H‐NMR analysis. The photochemical quantum yields φ t→c , and φ c→t are determined in methanol and in reversed micelles of the system (CDBA, benzene, water). The quantum yield φ c→t increases in reversed micelles compared to that in methanol. The reverse results are obtained for φ t→c . The micellar effect on the photochemical trans→cis isomerization will be discussed.