基于葫芦[6]脲的多功能超分子组装体：合成、钡（II）的去除及铁（III）的荧光传感
Cucurbit[6]uril-based multifunctional supramolecular assemblies: synthesis, removal of Ba(ii) and fluorescence sensing of Fe(iii).
作者信息
Zhang Xiu-Du, Zhao Yue, Chen Kai, Wang Peng, Kang Yan-Shang, Wu Hua, Sun Wei-Yin
机构信息
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, China.
出版信息
Dalton Trans. 2018 Mar 12;47(11):3958-3964. doi: 10.1039/c8dt00182k.
A novel cucurbit[6]uril-based (Q[6]) supramolecular assembly {(NH)·Q[6]·(HDTNB)·2HO} (1) with a three-dimensional (3D) framework structure was successfully constructed via outer-surface interactions between Q[6] and a flexible aromatic compound, 5,5'-dithiobis-(2-nitrobenzoic acid) (HDTNB), as a structure-directing agent. It is interesting to find that assembly 1 can selectively capture Ba(ii) cations among the common alkaline-earth metal ions of Mg(ii), Ca(ii), Sr(ii) and Ba(ii), resulting in the formation of an isomorphic 3D assembly {Ba(HO)Q[6]}·(HDTNB) (2). Furthermore, both assemblies 1 and 2 exhibit the selective sensing of Fe(iii) ions through fluorescence quenching, which has rarely been reported for Q[n]-based supramolecular assemblies.
通过葫芦[6]脲（Q[6]）与作为结构导向剂的柔性芳香族化合物5,5'-二硫代双（2-硝基苯甲酸）（HDTNB）之间的外表面相互作用，成功构建了一种具有三维（3D）骨架结构的新型基于葫芦[6]脲（Q[6]）的超分子组装体{(NH)·Q[6]·(HDTNB)·2HO}（1）。有趣的是，组装体1能够在Mg(ii)、Ca(ii)、Sr(ii)和Ba(ii)等常见碱土金属离子中选择性捕获Ba(ii)阳离子，从而形成同构的3D组装体{Ba(HO)Q[6]}·(HDTNB)（2）。此外，组装体1和2都通过荧光猝灭对Fe(iii)离子表现出选择性传感，这在基于Q[n]的超分子组装体中鲜有报道。
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