A study of the interaction between inverted cucurbit[7]uril and symmetric viologens

作者：Gao, Zhongzheng; Bai, Dong; Chen, Lixia; Tao, Zhu; Xiao, Xin^*; Prior, Timothy J.; Redshaw, Carl^*

来源：RSC Advances, 2017, 7(1): 461-467.

DOI：10.1039/c6ra24780f

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The interaction between inverted cucuribit[7]uril (iQ[7]) and a series of symmetric viologen derivatives bearing aliphatic substituents of variable length, namely dicationic dialkyl-4,4'-bipyridinium guests where the alkyl is CH3(CH2)(n) with n = 0 to 6, has been studied in aqueous solution by H-1 NMR spectroscopy, electronic absorption spectroscopy, isothermal titration calorimetry and mass spectrometry. In the case of both n = 5 (HV2+) and 6 (SV2+), single crystal X-ray diffraction revealed the composition to be [(iQ [7])(2)(HV)(2)][CdCl3Br][H3O+](2)[H2O](12.5) and (iQ[7])(2)(C7-SV)(1.5)[CdCl4](4)(H3O+)(5)(H2O)(8), respectively, with both adopting an external B-type structure (the alkyl chains of the viologen reside within the iQ[7]).

• 出版日期2017
• 单位贵州大学