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Host-Guest Interactions of Cyclopentanocucurbit[6]uril with Alkyl Imidazolium Hydrochlorides
Authors:GAO Jie  MENG Ye  ZHAO Weiwei  JIANG Daofa  JIN Yanmei  ZHENG Jun  YANG Xinan  MA Peihua
Affiliation:Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province,College of Chemistry and Chemical Engineering,Guizhou Univer-sity,Guiyang 550025,P.R.China
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.
Keywords:Host-guest chemistry  Cucurbituril  Alkyl imidazolium salt  Inclusion complex  
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