Cucurbit[7]uril-Based Metal-Organic Rotaxane Framework for Dual-Capture of Molecular Iodine and Cationic Potassium Ion

Xiu-Du Zhang; Yue Zhao; Kai Chen; Xiao-Yao Dao; Yan-Shang Kang; Yi Liu; Wei-Yin Sun

doi:10.1002/chem.201905156

Cucurbit[7]uril-Based Metal-Organic Rotaxane Framework for Dual-Capture of Molecular Iodine and Cationic Potassium Ion

Chemistry. 2020 Feb 17;26(10):2154-2158. doi: 10.1002/chem.201905156. Epub 2020 Jan 30.

Authors

Xiu-Du Zhang¹, Yue Zhao¹, Kai Chen², Xiao-Yao Dao¹, Yan-Shang Kang¹, Yi Liu¹, Wei-Yin Sun¹

Affiliations

¹ Coordination Chemistry Institute, State Key Laboratory of, Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China.
² Collaborative Innovation Center of Atmospheric Environment, and Equipment Technology, Jiangsu Key Laboratory of, Atmospheric Environment Monitoring, and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, P. R. China.

PMID: 31803978
DOI: 10.1002/chem.201905156

Abstract

Metal-organic rotaxane frameworks (MORFs) attracted much attention in the past years for construction of intelligent functional materials. Herein, a one-pot synthesis is reported of a three-dimensional (3D) cucurbit[7]uril (Q[7])-based MORF under hydrothermal conditions, namely Q[7]-MORF-1, formed by encapsulating the anionic benzoate moieties of the tricarboxylate ligand into the cavity of Q[7]. Furthermore, Q[7]-MORF-1 shows dual-capture capacity for iodine and K⁺ selectively among the alkali metal ions. The captured molecular iodine is included in the cavity of Q[7] through halogen-bonding interactions and the K⁺ cations are positioned at the carbonyl port of the Q[7] through K-O coordination interactions.

Keywords: cucurbit[7]uril; iodine; metal-organic rotaxane frameworks; potassium.

Abstract

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