Li Yaxin, Zhang Mouyi, Wang Ying, Guan Lei, Zhao Di, Hao Xinyu, Guo Yuting
School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
Molecules. 2024 Jun 20;29(12):2943. doi: 10.3390/molecules29122943.
A novel coordination polymer [Zn(atyha)] () (Hatyha = 2-(2-aminothiazole-4-yl)-2- hydroxyiminoacetic acid) was constructed by hydrothermal reaction of Zn with Hatyha ligand. CP exhibits a 2D (4,4)-connected topological framework with Schläfli symbol of {4·6}, where atyha anions serve as tridentate ligands, bridging with Zn through carboxylate, thiazole and oxime groups. CP displays a strong ligand-based photoluminescence at 390 nm in the solid state, and remains significantly structurally stable in water. Interestingly, it can be utilized as a fluorescent probe for selective and sensitive sensing of Fe, CrO and MnO through the fluorescent turn-off effect with limit of detection (LOD) of 3.66 × 10, 2.38 × 10 and 2.94 × 10 M, respectively. Moreover, the efficient recyclability for detection of Fe and CrO is better than that for MnO. The mechanisms of fluorescent quenching involve reversible overlap of UV-Vis absorption bands of the analytes (Fe, CrO and MnO) with fluorescence excitation and emission bands for CP , respectively.
通过锌与2-(2-氨基噻唑-4-基)-2-羟基亚氨基乙酸（Hatyha）配体的水热反应构建了一种新型配位聚合物[Zn(atyha)]（）。配位聚合物呈现出二维（4,4）连接的拓扑框架，其施莱夫利符号为{4·6}，其中atyha阴离子作为三齿配体，通过羧酸根、噻唑和肟基与锌桥连。配位聚合物在固态下于390nm处显示出强烈的基于配体的光致发光，并且在水中结构上仍保持显著稳定。有趣的是，它可作为荧光探针，通过荧光猝灭效应分别对铁、铬酸根和高锰酸根进行选择性和灵敏传感，检测限（LOD）分别为3.66××10、2.38×10和2.94×10 M。此外，铁和铬酸根检测的有效可回收性优于高锰酸根。荧光猝灭机制分别涉及分析物（铁、铬酸根和高锰酸根）的紫外-可见吸收带与配位聚合物的荧光激发和发射带的可逆重叠。
