University Chemistry ›› 2018, Vol. 33 ›› Issue (12): 83-88.doi: 10.3866/PKU.DXHX201804021

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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

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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