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Web Release Date: January 30, 2010
148 Carotenoid Radicals: Cryptochemistry of Natural Colorants
Lowell D. Kispert and Nikolay E. Polyakov  
[ Full Text PDF(J-STAGE)]  
This review examines the properties and uses of carotenoid radicals. Their mechanisms of action on the molecular level play a crucial role in electron transfer and light regulation processes in photosynthesis, in the design of improved artificial solar cells, and in the scavenging of toxic free radicals. There is a remarkable increase in the quantum yield and the lifetime of the charge-separated states of the carotenoid radical cations in the supramolecular “hosts” β-glycyrrhizic acid (GA) and arabinogalactan (AG).


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