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

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]).

Citation

Gao, Z., Chen, L., Gao, Z., Bai, D., Chen, L., Tao, Z., …Redshaw, C. (2017). A study of the interaction between inverted cucurbit[7]uril and symmetric viologens. RSC advances, 7(1), 461-467. https://doi.org/10.1039/c6ra24780f

• Journal Article Type: Article
• Acceptance Date: Nov 29, 2016
• Publication Date: Jan 5, 2017
• Deposit Date: Jan 9, 2017
• Publicly Available Date: Jan 9, 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
• Public URL: https://hull-repository.worktribe.com/output/446917
• 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