论文标题
近似自旋1/2对的溶液NMR光谱中的互相关效应
Cross-correlation effects in the solution NMR spectra of near-equivalent spin-1/2 pairs
论文作者
论文摘要
Spin-1/2对的NMR光谱包含四个峰，其两个内峰比近等效度方案中的外峰强得多。我们已经观察到，当在13C2标记的Triyne衍生物上进行测量时，强内峰具有明显不同的线宽。该线宽差异可能归因于强互相关效应。如果分子表现出强烈的各向异性旋转扩散，我们在近乎相关的同核自旋1对的情况下发展了交叉相关的松弛理论。与实验性NMR线路形成良好的一致性。
The NMR spectra of spin-1/2 pairs contains four peaks, with two inner peaks much stronger than the outer peaks in the near-equivalence regime. We have observed that the strong inner peaks have significantly different linewidths, when measurements were performed on a 13C2-labelled triyne derivative. This linewidth difference may be attributed to strong cross-correlation effects. We develop the theory of cross-correlated relaxation in the case of near-equivalent homonuclear spin-1/2 pairs, in the case of a molecule exhibiting strongly anisotropic rotational diffusion. Good agreement is found with the experimental NMR lineshapes.
