Assemblies of Cucurbituril-Based Coordination Complexes with Disulfonate Ligands: From Discrete Complexes to One- and Two-Dimensional Polymers
Chen, Kai; Hua, Zi-Yi; Li, Ran; Peng, Yu-Ying; Zhu, Zhao qiang; Zhao, Jiang-lin; Redshaw, Carl
Zhao qiang Zhu
Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry
In this work, the combination of cucurbituril (Q) with varied naphthalene disulfonates and alkaline-earth metal ions allows for successful isolation of 9 novel Q-based coordination complexes with formulas of [Ca(H2O)4(Q)0.5(1,5-NDA)0.5]·(1,5-NDA)0.5·3H2O (1), [Sr(H2O)4(Q)0.5(1,5-NDA)0.5]·(1,5-NDA)0.5·4H2O (2), [Ba(H2O)4(Q)0.5(1,5-NDA)0.5]·(1,5-NDA)0.5·4H2O (3), [Ca(H2O)5(Q)0.5](2,6-NDA)·9H2O (4), [Sr(H2O)5(Q)0.5]·(2,6-NDA)·6H2O (5), [Ba2(H2O)7(Q)(2,6-NDA)2]·11H2O (6), [Sr(H2O)4(Q)0.5(2,6-NDA)0.5]·(2,6-NDA)0.5·5H2O (7), [Ca2(H2O)10(Q)](2,7-NDA)·14H2O (8) and [Sr(H2O)5(Q)(2,7-NDA)]·4H2O (9) (H2NDA = naphthalene disulfonic acid). Structural analysis revealed that the carbonyl groups of Q 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-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 were constituted through various noncovalent interactions, particularly involving outer-surface interactions of the Qs. Furthermore, the fluorescent properties of the 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.
Chen, K., Hua, Z., Li, R., Peng, Y., Zhu, Z. Q., Zhao, J., & Redshaw, C. (in press). Assemblies of Cucurbituril-Based Coordination Complexes with Disulfonate Ligands: From Discrete Complexes to One- and Two-Dimensional Polymers. CrystEngComm RSC, https://doi.org/10.1039/d0ce01456g
|Journal Article Type||Article|
|Acceptance Date||Nov 10, 2020|
|Online Publication Date||Nov 13, 2020|
|Deposit Date||Nov 16, 2020|
|Publicly Available Date||Nov 14, 2021|
|Publisher||Royal Society of Chemistry|
|Peer Reviewed||Peer Reviewed|
|Keywords||General Materials Science; General Chemistry; Condensed Matter Physics|
|Additional Information||: This document is Similarity Check deposited; : Supplementary Information; : Single-blind; : Received 5 October 2020; Accepted 10 November 2020; Accepted Manuscript published 13 November 2020|
This file is under embargo until Nov 14, 2021 due to copyright reasons.
Contact C.Redshaw@hull.ac.uk to request a copy for personal use.
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