Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (10): 20240297.doi: 10.7503/cjcu20240297

• Article: Inorganic Chemistry • Previous Articles    

Synthesis, Characterization and Catalytic Property of the Cu(II) Complex Based on Benzene Sulfonic Acid Ligand

WANG Xin, QI Jinyang, YANG Ruijie, SONG Zhiguo, WANG Min()   

  1. College of Chemistry and Materials Engineering,Bohai University,Jinzhou 121013,China
  • Received:2024-06-19 Online:2024-10-10 Published:2024-08-21
  • Contact: WANG Min E-mail:wangmin@qymail.bhu.edu.cn
  • Supported by:
    the Ministry of Education’s Industry-University Collaborative Education Project of the First Batch in 2024, China(230805940290824)

Abstract:

Cu(Im)4p-CH3C6H4SO32 was prepared by solvent thermal synthesis using copper nitrate trihydrate, sodium p-methylbenzenesulfonate(p-CH3C6H4SO3Na) and imidazole(Im) as raw materials. It was characterized by means of single crystal X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, nitrogen adsorption/ desorption analysis and powder X-ray diffraction. By single crystal X-ray diffraction analysis, it could be seen that the center Cu2+ of the complex was coordinated with O atoms in two p-methylbenzenesulfonate anions and N atoms in four imidazoles to form a three-dimensional network structure by intermolecular hydrogen bonding force. The Knoevenagel condensation reaction was used as a probe to investigate the catalytic activity of the complex. The results showed that the complex exhibited acid-base synergistic catalysis in the Knoevenagel condensation reaction. The reaction time was short, the products yields were high, and the catalyst could be reused many times. Finally, the activity sites and reaction sites of Cu(Im)4p-CH3C6H4SO32, benzaldehyde and malononitrile were predicted by density functional theory(DFT) and verified by X-ray photoelectron spectroscopy, and the possible catalytic mechanism was deduced.

Key words: Benzenesulfonic acid complex, Knoevenagel condensation reaction, Acid-base synergistic catalysis, Density functional theory, Catalytic mechanism

CLC Number: 

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