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DELAYED FLUORESCENCE AND SOME PROPERTIES OF THE CHLOROPHYLL TRIPLETS
Author(s) -
Parker C. A.,
Joyce Thelma A.
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.tb08886.x
Subject(s) - fluorescence , chemistry , solvent , photochemistry , polyvinyl alcohol , ethanol , triplet state , chlorophyll fluorescence , chlorophyll , analytical chemistry (journal) , chromatography , molecule , organic chemistry , optics , physics
–P‐Type delayed fluorescence and sensitised P‐Type delayed fluorescence have been observed from solutions of chlorophylls a and b in ethanol. E‐Type delayed fluorescence has been observed from solutions in propylene glycol. The measurements in propylene glycol have yielded approximate values for the triplet energies of chlorophylls a and b. Measurements of the emissions from the ethanolic solutions have been used to calculate approximate values of the triplet formation efficiencies in this solvent. The sums of the fluorescence and triplet formation efficiencies in ethanol fall far short of unity and the triplet formation efficiencies therefore need to be confirmed by an independent method before they can be accepted with confidence.