【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 Cd^Ⅱ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Cd^Ⅱ离子通过羧酸配体NDC^2-桥联形成对称三核Cd^Ⅱ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。更多还原

【Abstract】 A 3D Cd^Ⅱ-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-16belongs to the monoclinic I2/a space group and the adjacent Cd^Ⅱions are bridged through the carboxylate ligand NDC^2-to form a symmetrical trinuclear Cd^Ⅱcluster, which extends to obtain a 1D chain. The neighboring 1D chains are further linked by DDBD to form a 3D structure.JXUST-16could 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 ofJXUST-16due to the competitive absorption mechanism; while H₂PO₄^-had a certain redshift and turn-on effect on the fluorescence ofJXUST-16, which can be explained by the absorbance-caused enhancement mechanism CCDC: 2174537.更多还原