SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 57 ›› Issue (5): 233-246.DOI: 10.1016/j.cjche.2022.08.013

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Double open mouse-like terpyridine parts based amphiphilic ionic molecules displaying strengthened chemical adsorption for anticorrosion of copper in sulfuric acid solution

Yueting Shi, Junhai Zhao, Lingli Chen, Hongru Li, Shengtao Zhang, Fang Gao   

  1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
  • Received:2022-03-12 Revised:2022-08-25 Online:2023-07-08 Published:2023-05-28
  • Contact: Shengtao Zhang,E-mail:stzhang@cqu.edu.cn;Fang Gao,E-mail:fgao@cqu.edu.cn
  • Supported by:
    We greatly thank the National Natural Science Foundation of China (21376282, 21676035, 21878029). We also thank Chongqing Science and Technology Commission (cstc2018jcyjAX0668). X. Wang thanks Shandong Province Natural Science Foundation (ZR2020QB18). H. Li thanks China Postdoctoral Science Foundation (22012 T50762 & 2011 M501388). Y. Shi thanks Graduate Student Research Innovation Project, Chongqing University (CYB18046).

Double open mouse-like terpyridine parts based amphiphilic ionic molecules displaying strengthened chemical adsorption for anticorrosion of copper in sulfuric acid solution

Yueting Shi, Junhai Zhao, Lingli Chen, Hongru Li, Shengtao Zhang, Fang Gao   

  1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
  • 通讯作者: Shengtao Zhang,E-mail:stzhang@cqu.edu.cn;Fang Gao,E-mail:fgao@cqu.edu.cn
  • 基金资助:
    We greatly thank the National Natural Science Foundation of China (21376282, 21676035, 21878029). We also thank Chongqing Science and Technology Commission (cstc2018jcyjAX0668). X. Wang thanks Shandong Province Natural Science Foundation (ZR2020QB18). H. Li thanks China Postdoctoral Science Foundation (22012 T50762 & 2011 M501388). Y. Shi thanks Graduate Student Research Innovation Project, Chongqing University (CYB18046).

Abstract: In this study, the benign target double terpyridine parts based amphiphilic ionic molecules (AIMs 1, 2) and the reference single terpyridine segment included AIMs (AIMs 3, 4) were synthesized through a multi-step method, and the molecular structures were fully characterized. The excellent anticorrosion of the target AIMs for copper surface in H2SO4 solution was demonstrated by the electrochemistry analysis, which was more superior over those of the reference AIMs. The standard adsorption free energy changes of the target AIMs calculated by the adsorption isotherms were lower than –40 kJ·mol-1, suggesting an intensified chemical adsorption on metal surface. The molecular modeling and molecular dynamic computation of the studied AIMs were performed, demonstrating that the target AIMs exhibited lower highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps and greater adsorption energies than the reference ones. The chemical adsorption of the AIMs on metal surface was revealed by various spectroscopic methods including scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, attenuated total reflection infrared spectroscopy, Raman and X-ray diffraction.

Key words: Amphiphilic ionic molecule, Adsorption, Corrosion, Electrochemistry, Copper, H2SO4 solution

摘要: In this study, the benign target double terpyridine parts based amphiphilic ionic molecules (AIMs 1, 2) and the reference single terpyridine segment included AIMs (AIMs 3, 4) were synthesized through a multi-step method, and the molecular structures were fully characterized. The excellent anticorrosion of the target AIMs for copper surface in H2SO4 solution was demonstrated by the electrochemistry analysis, which was more superior over those of the reference AIMs. The standard adsorption free energy changes of the target AIMs calculated by the adsorption isotherms were lower than –40 kJ·mol-1, suggesting an intensified chemical adsorption on metal surface. The molecular modeling and molecular dynamic computation of the studied AIMs were performed, demonstrating that the target AIMs exhibited lower highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps and greater adsorption energies than the reference ones. The chemical adsorption of the AIMs on metal surface was revealed by various spectroscopic methods including scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, attenuated total reflection infrared spectroscopy, Raman and X-ray diffraction.

关键词: Amphiphilic ionic molecule, Adsorption, Corrosion, Electrochemistry, Copper, H2SO4 solution