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ENERGY TRANSFER FROM CAROTENOID POLYENES TO PORPHYRINS: A LIGHT‐HARVESTING ANTENNA
Author(s) -
Moore Ana L.,
Dirks Gary,
Gust Devens,
Moore Thomas A.
Publication year - 1980
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.1751-1097.1980.tb04041.x
Subject(s) - porphyrin , photochemistry , chromophore , quenching (fluorescence) , chemistry , carotenoid , energy transfer , fluorescence , singlet state , covalent bond , electron transfer , excited state , chemical physics , atomic physics , physics , organic chemistry , optics , food science
— Carotenoid to porphyrin singlet‐singlet energy transfer has been observed in a new covalently linked carotenoid‐porphyrin ester. Nuclear magnetic resonance studies reveal that the relatively high energy transfer efficiency (˜ 25%) is a result of a stacked conformation in which the 26 π electron carotenoid chromophore resides ˜4–5 Å above the mean porphyrin plane. Substantial quenching of porphyrin fluorescence was also observed. Implications for the mechanism of energy transfer and possible applications to synthetic solar energy conversions systems are discussed.