大学化学 >> 2021, Vol. 36 >> Issue (4): 2004004.doi: 10.3866/PKU.DXHX202004004

师生笔谈 上一篇    下一篇

核磁共振原理中几个基本概念的教学处理

马忠华, 曹秀芳, 江洪, 马济美()   

  • 收稿日期:2020-04-01 录用日期:2020-07-30 发布日期:2020-08-19
  • 通讯作者: 马济美 E-mail:majimei@mail.hzau.edu.cn
  • 作者简介:马济美, Email: majimei@mail.hzau.edu.cn
  • 基金资助:
    华中农业大学一流课程课堂研究与改革项目(2019055)

An Attempt on the Teaching Basic Concepts of the Nuclear Magnetic Resonance

Zhonghua Ma, Xiufang Cao, Hong Jiang, Jimei Ma()   

  • Received:2020-04-01 Accepted:2020-07-30 Published:2020-08-19
  • Contact: Jimei Ma E-mail:majimei@mail.hzau.edu.cn

摘要:

核磁共振是解析有机化合物结构的一种常用的方法,也是波谱学课程教学中的重点内容之一。核磁共振原理中的几个基本概念(磁性核、核自旋、角动量、磁旋比、电四极矩)和原子核内部能级在外磁场中的变化等,是对核磁共振深入认知和理解不可或缺的内容。本文探讨了在教学中如何合理地对这些内容所涉及的量子物理学的原理进行简化处理,并结合化学学科内容进行阐释,从而使学生更好地掌握核磁共振分析手段,培养学生科学系统地思考、剖析问题的能力,拓展学生的思维能力与认知,培养学生对自然学科发展规律的正确认识,以及正确的科学价值取向。

关键词: 核磁共振, 磁性核, 磁旋比, 核磁矩, 角动量

Abstract:

Nuclear magnetic resonance (NMR) is a frequently used spectral method for structural analysis of organic compounds. It is also an important content in the teaching of spectroscopy course. The principle of nuclear magnetic resonance involves some basic concepts including magnetic nucleus, nuclear spin, angular momentum, magnetogyric ratio, electric quadrupole moment, and the change of the internal nuclear energy level distribution in external magnetic field, etc. These concepts are important for the beginners to understand the principle of nuclear magnetic resonance. In this article, the attempt to rationally simplify the complex principle of quantum physics and elucidate the principle from the view of chemistry discipline, and to reasonably integrate ideological and political elements in teaching is discussed. This practice would not only help the students to understand the basic principle in depth, but also cultivate their scientific and systematical thinking and ability to solve complex problems.

Key words: Nuclear magnetic resonance, Magnetic nucleus, Magnetogyric ratio, Nuclear magnetic moment, Angular momentum

MSC2000: 

  • G64