Radicals formed from proton loss of carotenoid radical cations: A special form of carotenoid neutral radical occurring in photoprotection

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• 作者：A. Ligia Focsan^a ; ^{alfocsan@valdosta.edu} ; Lowell D. Kispert^b
• 关键词：Carotenoid neutral radical ; Carotenoid radical cation ; Photoprotection ; Unpaired spin density distribution ; Optical spectrum ; Surface oxygen
• 刊名：Journal of Photochemistry and Photobiology B: Biology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：166
• 期：Complete
• 页码：148-157
• 全文大小：1664 K
• 卷排序：166

文摘

Properties of carotenoid neutral radicals Car formed by proton loss from radical cations Car+. In organized assemblies proton loss from terminal ends of Car+ to maximize delocalization. In unorganized assemblies proton loss occurs from all positions (C4, C5, C9 and C13). Different unpaired spin density distributions and optical spectra of Car. Car formed under irradiation could provide ps lifetime photoprotective role in plants.