大学化学 >> 2018, Vol. 33 >> Issue (12): 83-88.doi: 10.3866/PKU.DXHX201804021

师生笔谈 上一篇    下一篇

氢核磁共振谱自旋耦合裂分现象的量子力学解释

黄本宸,王荷芳*()   

  • 收稿日期:2018-04-16 发布日期:2018-12-14
  • 通讯作者: 王荷芳 E-mail:wanghefang@nankai.edu.cn
  • 基金资助:
    基础学科拔尖学生培养试验计划2018年课题

Explanation of Spin Coupling Splitting Phenomenon in 1H-NMR Spectra via Quantum Mechanics

Kevin HUANG,Hefang WANG*()   

  • Received:2018-04-16 Published:2018-12-14
  • Contact: Hefang WANG E-mail:wanghefang@nankai.edu.cn
  • Supported by:
    基础学科拔尖学生培养试验计划2018年课题

摘要:

氢核磁共振谱是大学仪器分析和有机结构分析课程中重要的学习内容,氢核之间的自旋耦合裂分规律是教学重点。对于自旋耦合裂分的成因,大多数教科书说是由其他邻近原子核不同的自旋取向产生的局部磁场产生的(即核磁偶极-偶极作用,直接核自旋耦合),少数核磁共振专著提到电子自旋极化介导的核自旋耦合(间接核自旋耦合)。在这里我们介绍量子力学对氢核之间的自旋耦合裂分规律的理论解释。

关键词: 核磁共振氢谱, 自旋耦合, 自旋裂分, 量子力学

Abstract:

Hydrogen nuclear magnetic resonance spectroscopy (1H-NMR) is an important content in the university course of instrumental analysis and organic structure analysis. The splitting law of spin coupling between hydrogen nuclei is the focus of teaching and learning. Most textbooks explain that the cause of spin coupling splitting is due to the local magnetic field produced by the different spin orientation of other adjacent nuclei (nuclei magnetic dipole-dipole interaction, direct nuclear spin coupling), and a few monograph on Nuclear Magnetic Resonance refers to electron spin polarization mediated nuclear spin coupling (indirect nuclear spin coupling). Here we introduce quantum mechanics for explanation of the splitting law of spin coupling between hydrogen nuclei.

Key words: 1H-NMR, Spin coupling, Spin splitting, Quantum mechanics

MSC2000: 

  • G64