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ON THE ORIGIN OF 628 nm FLUORESCENCE IN CERTAIN CHLOROPHYLL PREPARATIONS
Author(s) -
Seely G. R.
Publication year - 1992
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.1751-1097.1992.tb04244.x
Subject(s) - fluorescence , chlorophyll , tetradecane , chromophore , photochemistry , polyethylene , chemistry , chlorophyll fluorescence , chlorophyll a , adsorption , impurity , organic chemistry , optics , biochemistry , physics
— A fluorescence band at 628 nm seen in certain preparations of chlorophyll on polyethylene particles swollen with tetradecane comes not from an impurity of protochlorophyll in the original chlorophyll, but from a substance like protochlorophyll formed upon adsorption of chlorophyll to the particles. Much of the chlorophyll is grafted to polyethylene in the same particles by a process that does not affect the chromophore. These and other properties peculiar to the particles are tentatively ascribed to a prior free radical oxidation process in the swollen particles.