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PHOTOPHYSICAL STUDY OF THE SCHIFF BASES OF 5′‐DEOXYPYRIDOXAL AND n‐HEXYLAMINE IN CATIONIC MICELLES
Author(s) -
Vazquez Segura Miguel A.,
Donoso Josefa,
Muntoz Francisco,
Blanco Francisco Garciaa,
Garciaa del Vado M. Angeles,
Echevarriaa Gerardo
Publication year - 1994
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.1751-1097.1994.tb05123.x
Subject(s) - cationic polymerization , chemistry , pulmonary surfactant , micelle , enol , photochemistry , fluorescence , absorption (acoustics) , quenching (fluorescence) , aqueous solution , iodide , bromide , absorption spectroscopy , polymer chemistry , inorganic chemistry , organic chemistry , catalysis , materials science , biochemistry , physics , quantum mechanics , composite material
‐The absorption and fluorescence spectra of the Schiff bases formed between 5′‐deoxypyridoxal and n‐hex‐ylamine in aqueous media containing different concentrations of the cationic surfactant hexadecyltrimethylammonium bromide were recorded at 25°C. The quantum yields of fluorescence of the different zwitterionic and enol forms of the chemical species of the Schiff bases occumng in media of pH 4.5–8.5 were determined. Also, the fluorescence quenching resulting from the presence of the surfactant and that of iodide ion were analyzed. From the results obtained it follows that the zwitterionic forms do not interact with the cationic surfactant, whereas the enol forms do interact with it.