二茂镍 MAS NMR 中 1H 顺磁位移的意外温度依赖性

Magnetic Resonance Letters Pub Date : 2024-11-01 DOI:10.1016/j.mrl.2024.200119

Xinbiao Jiang, Jiefan Liu, Xiaobing Lou, Bingwen Hu, Ming Shen

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引用次数: 0

摘要

这项研究重新探讨了在快速魔角旋转（MAS）速率下，作为潜在核磁共振（NMR）温度计的二茂镍中 1H 顺磁移的温度依赖性。令人惊讶的是，我们观察到了 1H 顺磁移的异常温度依赖性。除了 1/T 依赖项之外，还必须包括 1/T2 依赖项，才能正确描述快速 MAS 速率下 δ1H-T 相关性的曲率行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Unexpected temperature dependence of 1H paramagnetic shift in MAS NMR of nickelocene

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Unexpected temperature dependence of 1H paramagnetic shift in MAS NMR of nickelocene

This work revisits the temperature dependence of ¹H paramagnetic shift in nickelocene as a potential nuclear magnetic resonance (NMR) thermometer under fast magic angle spinning (MAS) rate. Surprisingly, an abnormal temperature dependence of ¹H paramagnetic shift has been observed. In addition to a 1/T dependence term, a 1/T² dependence term must be included to correctly describe the curvature behavior of the δ^₁_H-T correlation under fast MAS rate.

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来源期刊

Magnetic Resonance Letters Analytical Chemistry, Spectroscopy, Radiology and Imaging, Biochemistry, Genetics and Molecular Biology (General)

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