A novel cucurbit[6]uril-based supramolecular coordination assembly as a multi-responsive luminescent sensor for Fe3+, Cr2O72- and isoquinoline antibiotics in aqueous medium
A novel cucurbit[6]uril-based supramolecular coordination assembly as a multi-responsive luminescent sensor for Fe3+, Cr2O72- and isoquinoline antibiotics in aqueous medium
复制标题
一种新型的基于葫芦[6]脲的超分子配位组装体作为水介质中Fe3、Cr2O72-和异喹啉抗生素的多响应发光传感器
DOI：
10.1039/c9tc02666e
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发表时间：
2019-08-07
影响因子：
6.4
通讯作者：
Li, Hui
中科院分区：
文献类型：
--
作者：
Sun, Jiupeng;Guo, Pengpeng;Li, Hui
以[Zn(ACA)(4)]（2-）为结构导向剂，在溶剂热条件下合成了一种新的基于CB[6]的超分子组合物：[Zn(ACA)(4)]中心点CB[6]中心点[NH2(CH3)(2)]中心点8H(2)O(1)（其中CB[6] =葫芦[6]脲，HACA =蒽-9-羧酸）。这种超分子组合的形成归因于非共价π MIDLINE水平椭圆π， C-HMIDLINE水平椭圆π和CB[6]外表面与[Zn(ACA)(4)]（2-）之间的氢键相互作用。化合物1具有良好的分散性、优异的水稳定性和易再生能力。更重要的是，1可以高度选择性地感应铁离子（Fe3+）和重铬酸盐离子（Cr2O72-）离子，荧光猝灭具有很强的猝灭常数(K-sv = 1.088 × 10（4) M-1 Fe3+和K-sv = 6 × 10(3) M-1 Cr2O72-）。此外，1也可用作微量异喹啉类抗生素的探针，对巴马汀的K-sv = 5.74 × 10(4) M-1，对小檗碱的K-sv = 4.2 × 10(4) M-1。据目前所知，这是首次使用基于CB[n]的超分子配位组装体高效检测Cr2O72-和抗生素。这些令人鼓舞的结果表明，1可以作为一种有前途的多响应发光传感器用于环境污染物监测，并且也为获得基于CB[n]的超分子配位组件提供了潜在的应用前景。
A novel CB[6]-based supramolecular assembly: [Zn(ACA)(4)]center dot CB[6]center dot[NH2(CH3)(2)]center dot 8H(2)O (1) (where CB[6] = cucurbit[6]uril, HACA = anthracene-9-carboxylic acid) has been synthesized under solvothermal conditions, using [Zn(ACA)(4)](2-) as a structure-directing agent. The formation of such a supramolecular assembly is attributed to the non-covalent pi MIDLINE HORIZONTAL ELLIPSIS pi, C-HMIDLINE HORIZONTAL ELLIPSIS pi and hydrogen bonding interactions between the outer-surface of CB[6] and [Zn(ACA)(4)](2-). Compound 1 exhibits good dispersibility, excellent water stability and easy regeneration ability. More importantly, 1 can be highly selective in sensing ferric ions (Fe3+) and dichromate ions (Cr2O72-) ions using fluorescence quenching with a strong quenching constant (K-sv = 1.088 x 10(4) M-1 for Fe3+ and K-sv = 6 x 10(3) M-1 for Cr2O72-). In addition, 1 can also be used as a probe for the determination of trace amounts of isoquinoline antibiotics with K-sv = 5.74 x 10(4) M-1 for palmatine and K-sv = 4.2 x 10(4) M-1 for berberine. As far as is known, this is the first example of the use of a CB[n]-based supramolecular coordination assembly for the highly efficient detection of Cr2O72- and antibiotics. These encouraging results indicate that 1 can act as a promising multi-responsive luminescent sensor for environmental pollutant monitoring, and also give an insight into obtaining a CB[n]-based supramolecular coordination assembly with potential applications as a luminescent sensor.