Supramolecular assemblies constructed from inverted cucurbit[7]uril and lanthanide cations: synthesis, structure and sorption properties

Li, Qing; Qiu, Sheng-Chao; Zhang, Yun-Qian; Xue, Sai-Feng; Tao, Zhu; Prior, Timothy J.; Redshaw, Carl; Zhu, Qian-Jiang; Xiao, Xin

Abstract

The interaction of a series of lanthanide cations (Ln³⁺) with inverted cucurbit[7]uril (iQ[7]) in the presence of [ZnCl₄]²⁻ anions as a structure-directing agent have been investigated. Single-crystal X-ray diffraction analysis has revealed that the [ZnCl₄]²⁻ anions surround the iQ[7] molecules via the outer surface interactions of iQ[7]. This results in the formation of honeycomb-like frameworks, and ultimately linear supramolecular chains of iQ[7] in which Ln³⁺ cations occupy voids within the framework. Moreover, these iQ[7]/Ln³⁺-based supramolecular assemblies exhibit excellent thermal stability as well as permanent porosity, and in one case screening revealed a high CH₃OH uptake capacity compared with other porous organic materials assembled solely through hydrogen bonding under ambient conditions.

Citation

Li, Q., Qiu, S.-C., Zhang, Y.-Q., Xue, S.-F., Tao, Z., Prior, T. J., Redshaw, C., Zhu, Q.-J., & Xiao, X. (in press). Supramolecular assemblies constructed from inverted cucurbit[7]uril and lanthanide cations: synthesis, structure and sorption properties. RSC advances, 6(81), 77805-77810. https://doi.org/10.1039/c6ra15559f

• Acceptance Date: Aug 6, 2016
• Online Publication Date: Aug 8, 2016
• Deposit Date: Aug 15, 2016
• Publicly Available Date: Feb 13, 2018
• Journal: RSC advances
• Print ISSN: 2046-2069
• Electronic ISSN: 2046-2069
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 81
• Pages: 77805-77810
• DOI: https://doi.org/10.1039/c6ra15559f
• Keywords: General Chemistry; General Chemical Engineering
• Public URL: https://hull-repository.worktribe.com/output/442218
• Publisher URL: http://pubs.rsc.org/en/content/articlelanding/2016/ra/c6ra15559f#!divAbstract
• Additional Information: : This document is Similarity Check deposited; CrossRef DOI Link to Correction:: https://doi.org/10.1039/C6RA90081J; : Supplementary Information; : Crystal Structure Data; : The Royal Society of Chemistry has an exclusive publication licence for this journal; OPEN ACCESS: The accepted version of this article will be made freely available after a 12 month embargo period; : Single-blind; : Received 15 June 2016; Accepted 6 August 2016; Accepted Manuscript published 8 August 2016; Version of Record published 16 August 2016
• Contract Date: Aug 15, 2016