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

Gao, Zhongzheng; Chen, Lixia; Gao, Zhong-Zheng; Bai, Dong; Chen, Li-Xia; Tao, Zhu; Xiao, Xin; Prior, Timothy J.; Redshaw, Carl

Authors

Dong Bai

Zhu Tao

Xin Xiao

Zhongzheng Gao

Lixia Chen

Abstract

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 ¹H NMR spectroscopy, electronic absorption spectroscopy, isothermal titration calorimetry and mass spectrometry. In the case of both n = 5 (HV ²⁺) 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]).

Journal Article Type Article
Publication Date Jan 5, 2017
Journal RSC advances
Print ISSN 2046-2069
Electronic ISSN 2046-2069
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 7
Issue 1
Pages 461-467
DOI https://doi.org/10.1039/c6ra24780f
Keywords Inverted cucurbit[7]uril, Symmetric viologens
Publisher URL http://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C6RA24780F#!divAbstract
Additional Information : This document is Similarity Check deposited; : Supplementary Information; : Crystal Structure Data; : Carl Redshaw (ORCID); : Carl Redshaw (ResearcherID); : The Royal Society of Chemistry has an exclusive publication licence for this journal; OPEN ACCESS: This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0); : Single-blind; : Received 5 October 2016; Accepted 29 November 2016; Version of Record published 5 January 2017

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