Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (3): 674-678.doi: 10.1007/s40242-021-1045-2

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Host-Guest Interactions of Cyclopentanocucurbit[6]uril with Alkyl Imidazolium Hydrochlorides

GAO Jie, MENG Ye, ZHAO Weiwei, JIANG Daofa, JIN Yanmei, ZHENG Jun, YANG Xinan, 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:2021-02-04 Revised:2021-03-15 Online:2021-06-01 Published:2021-03-16
  • Contact: MA Peihua E-mail:phma@gzu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No.21762011), the Guizhou Science and Technology Planning Project, China (Guizhou Science and Technology Cooperation Platform Talent)(No.20175788), and the Guizhou Province Graduate Education Innovation Project, China[No. YJSCXJH(2020)188].

Abstract: The host-guest interactions between cyclopentanocucurbit-[6]uril(CyP6Q[6]) as host and six alkyl imidazolium hydrochloride as guests(g1, g2, g3, g4, g5, and g6) have been studied by various techniques, such as 1H NMR spectroscopy, isothermal titration calorimetry, mass spectrometry, and single-crystal X-ray diffraction analysis. The experimental results showed that CyP6Q[6] formed 1:1 inclusion complexes with each of guests g1-g6. The part of the guest entered the cavity of CyP6Q[6] changes as the alkyl chain increases in length. It can be seen that the length of the alkyl chain plays a key role in determining the mode of host-guest interactions.

Key words: Host-guest chemistry, Cucurbituril, Alkyl imidazolium salt, Inclusion complex