A Fluorescent Anionic MOF with Zn4(trz)2 Chain for Highly Selective Visual Sensing of Contaminants: Cr(III) Ion and TNP
A Fluorescent Anionic MOF with Zn4(trz)2 Chain for Highly Selective Visual Sensing of Contaminants: Cr(III) Ion and TNP
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具有 Zn4(trz)2 链的荧光阴离子 MOF，用于污染物的高选择性视觉传感：Cr(III) 离子和 TNP
DOI：
10.1021/acs.inorgchem.6b02872
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发表时间：
2017-03-06
影响因子：
4.6
通讯作者：
Zhang, Xian-Ming
中科院分区：
文献类型：
--
作者：
Jia, Xiao-Xia;Yao, Ru-Xin;Zhang, Xian-Ming
重金属离子和硝基芳烃类物质具有很强的毒性，对人体健康和生态环境都有很大的危害。选择性地检测和捕获这些有毒物质是一个迫切的问题。通过在π共轭芳香羧酸体系中引入三唑配体，借用有机模板开放骨架的思想，成功合成了稳定的荧光骨架[Me 2NH 2]（4）[Zn-6（qptc）（3）（trz）（4）]中心点6 H（2）O（1）（H（4）qptc =三联苯-2，5，2 '5'-四羧酸，trz = 1，2，4-三唑），其特征在于基于Zn-4（trz）（2）链的3D阴离子结构，其中通道被[Me 2NH 2]（+）阳离子填充。值得注意的是，该材料对水溶液中的重金属Cr 3+离子表现出选择性吸附和可循环检测，这可能是金属电荷、金属离子与羧酸根氧原子的键合能力以及软硬酸碱性质的协同作用。此外，它还能选择性地检测2，4，6-三硝基苯酚，其猝灭系数K-sv为2.08 × 10（6）M（-1）。
Heavy-metal ions and nitroaromatic substances are highly toxic and harmful to human health and the ecological environment. It is an urgent issue to selectively detect and capture these toxic substances. By introducing the triazole ligand to the pi-conjugated aromatic carboxylate system and borrowing the organic template open framework idea, a stable fluorescent framework [Me2NH2](4)[Zn-6(qptc)(3)(trz)(4)]center dot 6H(2)O (1) (H(4)qptc = terphenyl-2,5,2'5'-tetracarboxylic acid, trz = 1,2,4-triazole) has been successfully synthesized, which features Zn-4(trz)(2) chain-based 3D anionic structure with channels filled by [Me2NH2](+) cations. It is worth noting that the material exhibits selective adsorption and recyclable detection of heavy-metal Cr3+ ion in aqueous solutions, which may be the synergy from the metal charge, bond ability of metal ions to carboxylate oxygen atom, and soft-hard acid-base properties. Furthermore, it can selectively sense of 2,4,6-trinitrophenol with a large quenching coefficient K-sv of 2.08 X 10(6)M(-1).