Chinese Journal of Magnetic Resonance ›› 2021, Vol. 38 ›› Issue (2): 239-248.doi: 10.11938/cjmr20202849

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Structural Elucidation and Quantitative Analysis of Hydrogenation Products of Anthracene by NMR Spectroscopy

Meng-yu DOU1,2,Qi ZHAO1,2,Xiang-lin HOU1,2,Lei LIU3,Ming-xing TANG1,*(),Ying-xiong WANG1,2,*()   

  1. 1. Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
    2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
    3. School of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2020-08-24 Online:2021-06-05 Published:2020-09-24
  • Contact: Ming-xing TANG,Ying-xiong WANG E-mail:mxtang@sxicc.ac.cn;wangyx@sxicc.ac.cn

Abstract:

Three product mixtures of anthracene catalytic hydrogenation under different catalytic conditions were analyzed by nuclear magnetic resonance (NMR) spectroscopy. Dihydroanthracene, tetrahydroanthracene, symmetric octahydroanthracene, and asymmetric octahydroanthracene were successfully detected with diffusion-ordered spectroscopy (DOSY) and one-dimension selective gradient total correlation spectroscopy (selTOCSY) techniques. The 1H and 13C NMR signals of dihydroanthracene, tetrahydroanthracene and symmetric octahydroanthracene were assigned by 1H NMR, 13C NMR, DEPT135, 1H-1H COSY, 1H-13C HSQC. The conversion of anthracene and selectivity of the products were calculated by quantitative 1H NMR (QNMR). The results demonstrated that NMR is a versatile and powerful tool to guide and optimize catalytic reaction conditions for increasing the selectivity of symmetrical octahydroanthracene. The present research provides a systematic NMR analysis scheme for polycyclic aromatic hydrocarbons catalytic hydrogenation.

Key words: liquid-state nuclear magnetic resonance, structural assignment, DOSY, selTOCSY, QNMR, anthracene catalytic hydrogenation

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