检出限
发光
镧系元素
氰化物
金属有机骨架
猝灭(荧光)
化学
选择性
离子
单晶
材料科学
无机化学
结晶学
物理化学
荧光
有机化学
光电子学
催化作用
色谱法
吸附
物理
量子力学
作者
Weisai Liu,Fei Wang,Xiaoyi Chen,Wenke Zhi,Xuquan Wang,Baoqiang Xu,Bin Yang
摘要
Two novel 2D lanthanide metal-organic frameworks (Ln-MOFs), namely {[Eu2(DBTA)3(DMF)2]·DMF}n (1) and {[Tb2(DBTA)3(DMF)2]·DMF}n (2) (H2DBTA = 2,5-dibromoterephthalic acid), have been successfully synthesized by the solvothermal method. Single-crystal X-ray diffraction results proved that the complexes possess the same topological structure of a (42·6)2(42·84)(47·63)2-connected net. The recognition of CN- from interfering anions with a low detection limit by "turn-off" luminescence makes them promising candidates for the highly selective and sensitive detection of the cyanide ion. The Ln-MOFs 1 and 2 exhibit excellent chemical sensing properties for CN- with efficiency, selectivity, and excellent performance in various mixed anions. The evaluation parameters, including the quenching constant and detection limit, have been investigated to obtain the detection performance for CN-.
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