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Cucurbit[7]uril‐Based Metal–Organic Rotaxane Framework for Dual‐Capture of Molecular Iodine and Cationic Potassium Ion
Author(s) -
Zhang XiuDu,
Zhao Yue,
Chen Kai,
Dao XiaoYao,
Kang YanShang,
Liu Yi,
Sun WeiYin
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201905156
Subject(s) - rotaxane , chemistry , cationic polymerization , metal organic framework , iodine , ligand (biochemistry) , alkali metal , supramolecular chemistry , halogen , ion , metal ions in aqueous solution , metal , crystallography , polymer chemistry , crystal structure , organic chemistry , receptor , adsorption , biochemistry , alkyl
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.