A CdII-Based Metal-Organic Framework with pcu Topology as Turn-On Fluorescent Sensor for Al3+

Graphical Knowing it Al : A Cd II -based metal-organic framework that displays high sensitivity and selectivity toward Al 3+ detection is reported, with a low detection limit of 0.048 ppm. Due to its good thermal and chemical stabilities as well as recycling property, it holds great potential for application in recognizing Al 3+ by turn-on effect. A new metal-organic framework (MOF) {[Cd 2 (bbib) 2 (ndc) 2 ]⋅2DMF} n ( JXUST-1 ) (bbib=1,3-bis(benzimidazolyl)benzene, H 2 ndc=1,4-naphthalenedicarboxylic acid, DMF= N , N -dimethylformamide) has been solvothermally synthesized and characterized by single-crystal X-ray diffraction, PXRD, TGA, IR and elemental analysis. JXUST-1 exhibits a three-dimensional 6-connected pcu topology with a Schläfli symbol {4 12 .6 3 } constructed by [Cd 2 (CO 2 ) 3 ] secondary building units. Fluorescence studies show that this MOF can sensitively and selectively recognize Al 3+ via a fluorescence enhancement effect, and the detection limit is 0.048 ppm. Furthermore, JXUST-1 displays relatively good thermal and chemical stabilities as well as reusability. All these results suggest JXUST-1 to be a highly selective and recyclable luminescent sensing material for the detection of Al 3+ .