一个由原位反应制备的三维Pb(II)配合物及其在抗生素传感识别领域的应用  

A Three-Dimensional Pb(II) Complex Prepared by In-Situ Reaction and Its Application in the Field of Antibiotic Sensing Recognition

作　　者：孙阳宇 张超 汪兴淳 郝小瑄 罗万江 袁刚 

机构地区：[1]通化师范学院化学学院,吉林 通化 [2]通化县第七中学化学组,吉林 通化

出　　处：《材料化学前沿》2023年第4期77-86,共10页Advances in Material Chemistry

摘　　要：在水热条件下使用半刚性的咪唑-4,5-二甲酸衍生物配体(H3L-1)和金属Pb(II)离子通过自组装反应成功获得一种无色的针状晶体。单晶X-射线衍射分析显示该配合物分子式为[Pb(L)]n (1),其中初始的H3L-1配体在高温条件下脱去了一个羧基形成了L2‒形式,L2‒阴离子μ3-链接金属Pb(II)离子而形成了三维框架结构。拓扑分析显示配合物1的骨架是一个单节点的(3,3)-连接网络。配合物的晶相纯度,化学稳定性和热稳定性通过粉末X-射线衍射(PXRD)和热失重分析(TGA)等手段进行了表征。对配合物1的固态荧光性质进行了测定,结果显示配合物1是一种具有潜在应用价值的蓝光材料。此外,还对配合物1荧光传感性能进行了详细研究,测试多种常见的抗生素分子对配合物1荧光的影响,结果显示配合物1的荧光能够被以呋喃妥因(NFT)为代表的几种抗生素所猝灭,可作为检测这些抗生素分子的探针材料。A colorless acicular crystal was obtained by the self-assembly reaction of semi-rigid imidazole-4, 5-dicarboxylic acid derivative ligand (H3L-1) and metal Pb(II) ions under hydrothermal conditions. Single crystal X-ray diffraction analysis shows that the molecular formula of the complex is [Pb(L)]n (1), where the initial H3L-1 ligand removes a carboxyl group at high temperature to form L2‒ form, and L2‒ anions μ3-link metal Cd(II) ions to form a three-dimensional framework. Topological analysis shows that the framework of complex 1 is a single node (3,3)-connected network. The crystal purity, chemical stability and thermal stability of complex 1 were characterized by powder X-ray diffrac-tion (PXRD) and thermogravimetric analysis (TGA). The solid fluorescence properties of complex 1 were determined. The results showed that complex 1 is a kind of blue light material with potential application value. In addition, the fluorescence sensing properties of complex 1 were studied in de-tail, and the effects of many common antibiotic molecules on the fluorescence of complex 1 were tested. The results showed that the fluorescence of complex 1 can be quenched by several antibiot-ics represented by NFT, and can be used as probe materials for detecting these antibiotic molecules.

关 键 词：Pb(II)配合物 咪唑羧酸 原位反应 晶体结构 荧光传感 抗生素 

分 类 号：O64[理学—物理化学]