Premium
SPECTROSCOPIC BEHAVIOUR OF RETINYL POLYENES IN SOLID FILMS
Author(s) -
Hotchandani Surat,
Leblanc Roger M.
Publication year - 1976
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.1751-1097.1976.tb06797.x
Subject(s) - polyene , chromophore , retinal , chemistry , molecule , retinyl acetate , spectral line , absorption (acoustics) , photochemistry , absorption spectroscopy , retinol , optics , organic chemistry , vitamin , physics , biochemistry , astronomy
— The absorption spectroscopic study of retinyl polyenes, i.e. all‐ trans retinal, 9‐ cis retinal, 13‐ cis retinal, all‐ trans retinol, 13‐ cis retinol and all‐ trans retinyl acetate in solid films is discussed. The spectra of the films with low surface coverages obtained from dilute solutions are red shifted relative to their solution spectra. This shift is interpreted as due to the weak interaction between the surface and polyene molecules. With increased surface coverages, i.e. the films obtained from concentrated solutions, the retinals show a large red shift whereas a blue shift is observed with the retinols. Chromophore–chromophore interactions in addition to the surface effects are believed to be responsible for such observations. Effect of surface causing permanent changes in molecule is also discussed.