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Assemblies of cucurbit[6]uril-based coordination complexes with disulfonate ligands: From discrete complexes to one: From two-dimensional polymers

Chen, Kai; Hua, Zi Yi; Li, Ran; Peng, Yu Ying; Zhu, Qiang Zhao; Zhao, Jiang Lin; Redshaw, Carl

Authors

Kai Chen

Zi Yi Hua

Ran Li

Yu Ying Peng

Qiang Zhao Zhu

Jiang Lin Zhao

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Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry



Abstract

In this work, the combination of cucurbit[6]uril (Q[6]) with various naphthalene disulfonates and alkaline-earth metal ions allows for successful isolation of 9 novel Q[6]-based coordination complexes with the formulas [Ca(H2O)4(Q[6])0.5(1,5-NDA)0.5]·(1,5-NDA)0.5·3H2O (1), [Sr(H2O)4(Q[6])0.5(1,5-NDA)0.5]·(1,5-NDA)0.5·4H2O (2), [Ba(H2O)4(Q[6])0.5(1,5-NDA)0.5]·(1,5-NDA)0.5·4H2O (3), [Ca(H2O)5(Q[6])0.5](2,6-NDA)·9H2O (4), [Sr(H2O)5(Q[6])0.5]·(2,6-NDA)·6H2O (5), [Ba2(H2O)7(Q[6])(2,6-NDA)2]·11H2O (6), [Sr(H2O)4(Q[6])0.5(2,6-NDA)0.5]·(2,6-NDA)0.5·5H2O (7), [Ca2(H2O)10(Q[6])](2,7-NDA)·14H2O (8) and [Sr(H2O)5(Q[6])(2,7-NDA)]·4H2O (9) (H2NDA = naphthalenedisulfonic acid). Structural analysis revealed that the carbonyl groups of Q[6] bind directly to the alkaline-earth metal ions to form 1D coordination chains. Moreover, the metal ions are also linked to the disulfonate substituents of the naphthalenes, which, in the case of 9, resulted in a simple coordination complex, for 6, a 1D Q[6]-NDA-M2+ chain, and in the case of 1-3 and 7, 2D networks. By contrast, for 4, 5 and 8, the disulfonate ligands do not bind to the metals, and instead, act as supramolecular linkers. The resultant 3D supramolecular architecture of these compounds was constructed through various noncovalent interactions, particularly involving outer-surface interactions of the Q[6]s. Furthermore, the fluorescence properties of species 2 and 7 were investigated, and sensing experiments indicated that both were capable of functioning as fluorescent sensors for Fe3+ with high sensitivity and selectivity.

Citation

Chen, K., Hua, Z. Y., Li, R., Peng, Y. Y., Zhu, Q. Z., Zhao, J. L., & Redshaw, C. (2021). Assemblies of cucurbit[6]uril-based coordination complexes with disulfonate ligands: From discrete complexes to one: From two-dimensional polymers. CrystEngComm, 23(2), 465-481. https://doi.org/10.1039/d0ce01456g

Journal Article Type Article
Acceptance Date Nov 10, 2020
Online Publication Date Nov 13, 2020
Publication Date Jan 14, 2021
Deposit Date Nov 16, 2020
Publicly Available Date Mar 29, 2024
Journal CrystEngComm
Electronic ISSN 1466-8033
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 23
Issue 2
Pages 465-481
DOI https://doi.org/10.1039/d0ce01456g
Keywords General Materials Science; General Chemistry; Condensed Matter Physics
Public URL https://hull-repository.worktribe.com/output/3663353
Publisher URL https://pubs.rsc.org/en/Content/ArticleLanding/2020/CE/D0CE01456G#!divAbstract

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©2020 The authors. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder





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