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Issue 81, 2016
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Supramolecular assemblies constructed from inverted cucurbit[7]uril and lanthanide cations: synthesis, structure and sorption properties

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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.

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

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Publication details

The article was received on 15 Jun 2016, accepted on 06 Aug 2016 and first published on 08 Aug 2016


Article type: Paper
DOI: 10.1039/C6RA15559F
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RSC Adv., 2016,6, 77805-77810

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

    Q. Li, S. Qiu, Y. Zhang, S. Xue, Z. Tao, T. J. Prior, C. Redshaw, Q. Zhu and X. Xiao, RSC Adv., 2016, 6, 77805
    DOI: 10.1039/C6RA15559F

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