SHA+脉冲序列用于g-C3N4样品15N-15N相关性的

doi:10.11938/cjmr20160301

波谱学杂志 ›› 2016, Vol. 33 ›› Issue (3): 361-367.doi: 10.11938/cjmr20160301

SHA+脉冲序列用于g-C₃N₄样品¹⁵N-¹⁵N相关性的

闫晓静, 胡炳文

华东师范大学物理系, 上海市磁共振重点实验室, 上海 200062

收稿日期:2015-03-11 修回日期:2016-07-15 出版日期:2016-09-05 发布日期:2016-09-05
通讯作者: 胡炳文,电话:15000786783,E-mail:bwhu@phy.ecnu.edu.cn. E-mail:bwhu@phy.ecnu.edu.cn
作者简介:YAN Xiao-jing (1990-), female, born in Anhui province, her research focuses on NMR spectroscopy.
基金资助:
Large Instruments Open Foundation of East China Normal University, National Natural Science Foundation of China (21373086), National Science Fund of China for Excellent Young Scholars (21522303), Basic Research Project of Shanghai Science and Technology Committee (14JC1491000).

Probing ¹⁵N-¹⁵N Correlations in g-C₃N₄ Samples with Solid-State NMR SHA+ Pulse Sequence

YAN Xiao-jing, HU Bing-wen

School of Physics and Materials Science & Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai 200062, China

Received:2015-03-11 Revised:2016-07-15 Online:2016-09-05 Published:2016-09-05
Supported by:
Large Instruments Open Foundation of East China Normal University, National Natural Science Foundation of China (21373086), National Science Fund of China for Excellent Young Scholars (21522303), Basic Research Project of Shanghai Science and Technology Committee (14JC1491000).

摘要/Abstract

摘要：

利用固体核磁共振实验研究了¹⁵N标记的g-C₃N₄样品中的¹⁵N-¹⁵N空间相关性，在高场和魔角旋转条件下对比两种不同的脉冲序列PDSD和SHA+的实验效果．发现当某个氮上连有质子的时候，脉冲序列SHA+比PDSD可以更好地检测¹⁵N原子间的极化转移．该研究可以为材料科学领域，特别是含氮掺杂的碳材料，提供一种有价值的研究方法．

关键词: 固体核磁共振(SS-NMR), 同核相关, 长程相关, SHA+

Abstract:

The performance of solid-state NMR proton-driven spin-diffusion (PDSD) and second-order Hamiltonian among analogous nuclei plus (SHA+) sequences for probing ¹⁵N-¹⁵N through-space correlations in ¹⁵N-labelled g-C₃N₄ samples were compared at high magnetic fields with moderate magic angle spinning (MAS) frequencies. It was found that, relative to the PDSD sequence, the SHA+ sequence is more efficient in terms of yielding polarization transfer between the ¹⁵N atoms as long as one of the nitrogen atoms bonds to protons. The results are useful in guiding the choice of solid-state nuclear magnetic resonance (SS-NMR) sequences for studying nitrogen-doped carbon-based materials.

Key words: solid-state nuclear magnetic resonance (SS-NMR), homo-nuclear correlation, long-range correlation, SHA+

中图分类号:

O482.53

闫晓静, 胡炳文. SHA+脉冲序列用于g-C₃N₄样品¹⁵N-¹⁵N相关性的[J]. 波谱学杂志, 2016, 33(3): 361-367.

YAN Xiao-jing, HU Bing-wen. Probing ¹⁵N-¹⁵N Correlations in g-C₃N₄ Samples with Solid-State NMR SHA+ Pulse Sequence[J]. Chinese Journal of Magnetic Resonance, 2016, 33(3): 361-367.

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SHA+脉冲序列用于g-C₃N₄样品¹⁵N-¹⁵N相关性的

Probing ¹⁵N-¹⁵N Correlations in g-C₃N₄ Samples with Solid-State NMR SHA+ Pulse Sequence

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