Interference of homonuclear decoupling and exchange in the solid-state NMR of perfluorocyclohexane
Interference of homonuclear decoupling and exchange in the solid-state NMR of perfluorocyclohexane
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DOI：
10.1016/s1090-7807(03)00015-6
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发表时间：
2003-04-01
影响因子：
2.2
通讯作者：
Hodgkinson, P
中科院分区：
文献类型：
--
作者：
McMillan, DE;Hazendonk, P;Hodgkinson, P
我们观察到的F-19和构象交换中的C-13光谱的全氟环己烷的homomandescent去耦RF照射之间的干扰。我们表明，这些效果可以很容易地在模拟中再现，并将其依赖于各种NMR和实验参数。他们的应用观察汇率的kHz时间尺度上的T-1 p测量和建立两种方法之间的连接进行评估。本文还详细地讨论了利用H-1的同素脱耦来解决固体中（1）J（CH）耦合的实验所涉及的问题。(C)2003 Elsevier Science（美国）。All rights reserved.
We observe an interference between RF irradiation used for homonuclear decoupling of F-19 and conformational exchange in the C-13 spectrum of perfluorocyclohexane. We show that these effects can be readily reproduced in simulation, and characterise their dependence on the various NMR and experimental parameters. Their application to observing exchange rates on the kHz timescale is evaluated with respect to T-1p measurements and the connections between the two approaches established. The implications for experiments that use homonuclear decoupling of H-1 to resolve (1)J(CH) couplings in the solid-state are also evaluated in detail. (C) 2003 Elsevier Science (USA). All rights reserved.