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高等学校化学研究 ›› 2023, Vol. 39 ›› Issue (6): 1017-1022.doi: 10.1007/s40242-023-3078-1

• Articles • 上一篇    下一篇

Study on the Host-Guest Interactions Between Tetramethyl Cucurbit[6]uril and Benzimidazole Derivatives

YANG Naqin, DAI Xue, MA Yue, YANG Xinan, and MA Peihua   

  1. Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, P.R. China
  • 收稿日期:2023-03-24 出版日期:2023-12-01 发布日期:2023-11-18
  • 通讯作者: MA Peihua E-mail:phma@gzu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (No.22161010).

Study on the Host-Guest Interactions Between Tetramethyl Cucurbit[6]uril and Benzimidazole Derivatives

YANG Naqin, DAI Xue, MA Yue, YANG Xinan, and MA Peihua   

  1. Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, P.R. China
  • Received:2023-03-24 Online:2023-12-01 Published:2023-11-18
  • Contact: MA Peihua E-mail:phma@gzu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No.22161010).

摘要: In this paper, 1H NMR spectroscopy, isothermal titration calorimetry, X-ray crystallography and other characterization methods were used to investigate the interaction modes of tetramethyl cucurbit[6]uril (TMeQ[6]) and three benzimidazole derivatives in an aqueous solution-solid state. The results showed that the aromatic ring moieties in the three derivatives all entered the cavity of TMeQ[6] and their substituents were located at the port of TMeQ[6], forming 1:1 host-guest inclusion complexes. The crystal structures showed that the aromatic part of the benzimidazole derivatives interacted with the cavity of TMeQ[6] via hydrogen bond interactions and the N atoms on the benzimidazole ring formed hydrogen bonds with the carbonyl oxygen of TMeQ[6]. The ion-dipole interactions between [ZnCl4]2- and TMeQ[6] formed supramolecular self-assembly entities.

关键词: Tetramethyl cucurbit[6]uril (TMeQ[6]), Benzimidazole derivative, Host-guest interaction, Crystal structure

Abstract: In this paper, 1H NMR spectroscopy, isothermal titration calorimetry, X-ray crystallography and other characterization methods were used to investigate the interaction modes of tetramethyl cucurbit[6]uril (TMeQ[6]) and three benzimidazole derivatives in an aqueous solution-solid state. The results showed that the aromatic ring moieties in the three derivatives all entered the cavity of TMeQ[6] and their substituents were located at the port of TMeQ[6], forming 1:1 host-guest inclusion complexes. The crystal structures showed that the aromatic part of the benzimidazole derivatives interacted with the cavity of TMeQ[6] via hydrogen bond interactions and the N atoms on the benzimidazole ring formed hydrogen bonds with the carbonyl oxygen of TMeQ[6]. The ion-dipole interactions between [ZnCl4]2- and TMeQ[6] formed supramolecular self-assembly entities.

Key words: Tetramethyl cucurbit[6]uril (TMeQ[6]), Benzimidazole derivative, Host-guest interaction, Crystal structure