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INFLUENCE OF ENERGY TRANSFER ON THE PHOTOIONIZATION OF TRYPTOPHAN AND TYROSINE IN BASIC MEDIA †
Author(s) -
SANTUS R.,
BAZIN M.,
AUBAILLY M.,
GUERMONPREZ R.
Publication year - 1972
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.1751-1097.1972.tb06223.x
Subject(s) - photoionization , tryptophan , chemistry , photochemistry , chromophore , energy transfer , tyrosine , singlet state , triplet state , luminescence , electron transfer , ion , ionization , atomic physics , physics , molecular physics , molecule , optics , biochemistry , excited state , amino acid , organic chemistry
— The luminescence studies of the delayed isothermal and light stimulated recombinations of photoejected electrons with photoionized chromophores at 77°K show that in the peptide tryptophyltyrosine, where energy transfer occurs at the singlet level from tryptophan to tyrosine and at the triplet level from tyrosine to tryptophan, tryptophan photoionization is greatly enhanced. This increase in photoionization efficiency is attributed to triplet‐triplet transfer.