Low-temperature (77 K) phosphorescence of triplet chlorophyll in isolated reaction centers of photosystem IIстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 15 января 2016 г.
Аннотация:Phosphorescence characterized by the main emission band at 952 ± 1 nm (1.30 eV), the lifetime of
1.5 ± 0.1 ms and the quantum yield nearly equal to that for monomeric chlorophyll a in aqueous detergent dispersions, has been detected in isolated reaction centers (RCs) of spinach photosystem II at 77 K. The excitation spectrum shows maxima corresponding to absorption bands of chlorophyll a, pheophytin a, and b-carotene. The phosphorescence intensity strongly depends upon the redox
state of RCs. The data suggest that the phosphorescence signal originates from the chlorophyll triplet state populated via charge recombination in the radical pair P680+Pheo-.
DOI 10.1007/s11120-015-0105-1