1H, 2H, 19F, 14N ENDOR and TRIPLE resonance investigations of substituted flavin radicals in their different protonation states
1H, 2H, 19F, 14N ENDOR and TRIPLE resonance investigations of substituted flavin radicals in their different protonation states
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取代黄素自由基在不同质子化状态下的 1H、2H、19F、14N ENDOR 和 TRIPLE 共振研究
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
R. D. Allendoerfer
中科院分区：
文献类型：
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作者：
E. Weilbacher;N. Helle;M. Elsner;H. Kurreck;F. Müller;R. D. Allendoerfer
各种同位素标记的和/或取代的黄素已被转化为它们相应的自由基状态。通过化学方法产生阳离子自由基和中性自由基，通过电化学方法产生阴离子自由基。通过ENDOR和TRIPLE共振实验，获得了一套完整的超精细耦合常数，包括它们的符号。超精细数据允许（a）识别存在的自由基状态，（B）获得关于取代基的优选构象排列的信息和（c）关于取代基对不同自由基状态的自旋密度分布的影响的结论。
A variety of isotopically labelled and/or substituted flavins have been converted into their corresponding radical states. Cation and neutral radicals were generated chemically and anion radicals were obtained electrochemically. By performing ENDOR and TRIPLE resonance experiments, complete sets of hyperfine coupling constants including their signs were accessible. The hyperfine data allowed (a) identification of the radical state present, (b) information to be obtained about the preferred conformational arrangements of the substituents and (c) conclusions to be drawn about the influences of the substituents on the spin density distributions of the different radical states.