| 一种对MnO4-和H2PO4-具有选择性识别的基于CdⅡ配位聚合物的双功能荧光传感器 |
| A Dual-Function Fluorescence Sensor Based on CdⅡ Coordination Polymer for Selective Recognition of MnO4- and H2PO4- |
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| 摘要: 以4，7-二（1H-1，2，4-三氮唑-1-基）-2，1，3-苯并噻二唑（DDBD）为主配体，1，4-萘二甲酸（H2NDC）为辅助配体，通过溶剂热法合成得到了一例三维CdⅡ配位聚合物[Cd2（DDBD）（NDC）2]n（JXUST-16）。借助单晶X射线衍射、粉末X射线衍射、热重分析等对其进行了结构表征。在JXUST-16中，相邻的CdⅡ离子通过羧酸配体NDC2-桥联形成对称三核CdⅡ簇，由此延伸形成一维链，相邻的一维链进一步通过DDBD桥联形成三维结构。JXUST-16能稳定存在于有机溶剂和不同pH值水溶液中，且阴离子荧光传感实验表明：JXUST-16能够作为一种双功能荧光传感器识别MnO4-和H2PO4-。此外，MnO4-因吸收竞争机制对JXUST-16表现出荧光猝灭效应；H2PO4-对JXUST-16具有一定红移和荧光增强效应，其荧光增强可用吸收增强机制解释。 |
| 关键词: 双三氮唑基苯并噻二唑 配位聚合物 晶体结构 阴离子荧光传感 |
| 基金项目: 国家自然科学基金（No.22061019）和江西省自然科学基金（No.20202ACBL213001）资助 |
| Abstract: A 3D CdⅡ-based coordination polymer with the formula of[Cd2(DDBD)(NDC)2]n (JXUST-16) has been solvothermally synthesized by using 4, 7-bis(1H-1, 2, 4-triazol-1-yl)-2, 1, 3-benzothiadiazole (DDBD) as the primary ligand and 1, 4-naphthalenedicarboxylic acid (H2NDC) as the auxiliary ligand, and structurally characterized through single crystal X-ray diffraction, powder X-ray diffraction, thermogravimetry analysis, etc. JXUST-16 belongs to the monoclinic I 2/a space group and the adjacent CdⅡ ions are bridged through the carboxylate ligand NDC2- to form a symmetrical trinuclear CdⅡ cluster, which extends to obtain a 1D chain. The neighboring 1D chains are further linked by DDBD to form a 3D structure. JXUST-16 could keep stable in organic solvents and aqueous solutions with different pH values, and be used as a dual-function fluorescence sensor to identify MnO4- and H2PO4- with obvious naked-eye recognition under a 365 nm UV lamp. In addition, MnO4- showed a turn-off effect on the fluorescence of JXUST-16 due to the competitive absorption mechanism; while H2PO4- had a certain redshift and turn-on effect on the fluorescence of JXUST-16, which can be explained by the absorbance-caused enhancement mechanism. |
| Keywords: bistriazolyl benzothiadiazole coordination polymer crystal structure anions fluorescence sensing |
| 投稿时间：2022-02-01 修订日期：2022-07-23 |
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| 李亚平,张晓霞,邱成强,刘遂军.一种对MnO4-和H2PO4-具有选择性识别的基于CdⅡ配位聚合物的双功能荧光传感器[J].无机化学学报,2022,38(10):1948-1958. |
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