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INFRARED SPECTRAL OBSERVATIONS OF CHLOROPHYLL‐ a AND ETHYL CHLOROPHYLLIDE‐ a IN THE SOLID STATE *
Author(s) -
Sherman Gwendolyn,
Wang ShuFong
Publication year - 1967
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.1751-1097.1967.tb08811.x
Subject(s) - ketone , chemistry , pigment , chlorophyll a , chlorophyll , solid state , infrared , infrared spectroscopy , absorption (acoustics) , moisture , photochemistry , absorption spectroscopy , spectral line , analytical chemistry (journal) , chromatography , organic chemistry , optics , biochemistry , physics , astronomy
— Infrared spectra of ethyl chlorophyllide‐ a and chlorophlyll‐ a in Nujol mulls show a shift of the C 9 ketone carbonyl absorption band to higher frequencies when the pigments are subjected to drying processes. The ketone band can then be reversed back to lower frequencies by exposing the material to moisture. These observations indicate that the nature of chlorophyll aggregation in the solid state varies with the water content of the pigment.