MIMICRY OF CAROTENOID FUNCTION IN PHOTOSYNTHESIS - SYNTHESIS AND PHOTOPHYSICAL PROPERTIES OF A CAROTENOPYROPHEOPHORBIDE
MIMICRY OF CAROTENOID FUNCTION IN PHOTOSYNTHESIS - SYNTHESIS AND PHOTOPHYSICAL PROPERTIES OF A CAROTENOPYROPHEOPHORBIDE
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DOI：
10.1111/j.1751-1097.1982.tb09484.x
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发表时间：
1982-01-01
影响因子：
3.3
通讯作者：
GUST, D
中科院分区：
文献类型：
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作者：
LIDDELL, PA;NEMETH, GA;GUST, D
合成了一种由类胡萝卜素多烯共价连接到焦脱镁叶绿酸的新分子。该分子以扩展构象形式存在于溶液中，类胡萝卜素部分离四吡咯电子系统较远。该化合物表现出可以忽略的天线功能(从类胡萝卜素到焦脱镁叶绿酸的单线态能量转移)，但显著的光保护作用(由于从焦脱镁到类胡萝卜素的快速三重态能量转移)。这种分子的光化学性质与构象相似的胡萝卜素卟啉类似。胡萝卜素卟啉似乎是在体内模拟类胡萝卜素-叶绿素相互作用的有效合成体系。
A new molecule consisting of a carotenoid polyene [from spinach] covalently linked to a pyropheophorbide was prepared. This molecule exists in solution in an extended conformation with the carotenoid moiety relatively far from the tetrapyrrole .pi.-electron system. The compound shows negligible antenna function (singlet energy transfer from carotenoid to pyropheophorbide), but substantial photoprotection from singlet O production (due to rapid triplet energy transfer from pyrophenophorbide to carotenoid). The photochemical properties of this molecule parallel those of conformationally similar carotenoporphyrins. Carotenoporphyrins appear to be valid synthetic systems for modeling in vivo carotenoid-chlorophyll interactions.