Chlorophyll, triplet, lifetime quenching

Theoretical calculations have been made for photosynthetic pigments . An extensive review of models of energy and electron transfer events of synthetic molecules for photosynthesis has been prepared by Wasielewski . Other studies have made on tetraphenylporphyrin-polypeptide pigments , photosensitization of triplet carotenoids , fluorescence yields and lifetimes for bacteriochlorophyll c , triplet yields and ESR of chlorophyll 3 8 and quenching processes of pheophytin 539 ... 

The 1ms lifetime of the P680 triplet state is similar to the lifetime of chlorophyll-a in solution, which is 1.5-1.7ms. This indicates that the carotenoid present in this preparation is not quenching the P680 triplet state in the majority of reaction centres. 

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