通过核磁共振技术研究醌对二氢卟吩的光氧化作用。

Photooxidation of chlorins by quinones studied by nuclear magnetic resonance techniques.

作者信息

Lamola A A, Manion M L, Roth H D, Tollin G

机构信息

Bell Laboratories, Murray Hill, New Jersey 07974.

出版信息

Proc Natl Acad Sci U S A. 1975 Sep;72(9):3265-9. doi: 10.1073/pnas.72.9.3265.

DOI:10.1073/pnas.72.9.3265

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC432969/

Abstract

The reactions of photo-excited chlorophylls and pheophytins with quinones have been investigated by nuclear magnetic resonance techniques. In slightly alkaline solutions the quinone signals showed line broadening which is explained by degenerate electron transfer between semiquinone radical ions and their benzoquinone parents. In neutral solutions, chemically induced dynamic nuclear polarization was observed which is ascribed to the pair, chlorophyll cation-semiquinone anion. A kinetic analysis of the dependence of these effects upon the quinone concentration suggests that only the reactions of triplet-chlorophyll with the quinones give rise to chemically induced dynamic nuclear polarization effects.

摘要

利用核磁共振技术研究了光激发叶绿素和脱镁叶绿素与醌类的反应。在微碱性溶液中，醌类信号出现谱线展宽，这是由半醌自由基离子与其苯醌母体之间的简并电子转移所解释的。在中性溶液中，观察到化学诱导动态核极化，这归因于叶绿素阳离子-半醌阴离子对。对这些效应与醌类浓度依赖性的动力学分析表明，只有三线态叶绿素与醌类的反应会产生化学诱导动态核极化效应。

相似文献

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Photooxidation of chlorins by quinones studied by nuclear magnetic resonance techniques.

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Photooxidation of chlorophyll B by quinones studied by chemically-induced dynamic nuclear polarization.

Proc Natl Acad Sci U S A. 1973 Jan;70(1):143-6. doi: 10.1073/pnas.70.1.143.

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Photochem Photobiol. 1969 Mar;9(3):273-89. doi: 10.1111/j.1751-1097.1969.tb07291.x.

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