An ew 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 synthesizeda nd characterizedb ys ingle-crystal X-ray diffraction, PXRD, TGA, IR and elementala nalysis. JXUST-1 exhibits at hree-dimensional 6-connected pcu topologyw ith aS chläfli symbol {4 12 .6 3 }c onstructed by [Cd 2 (CO 2 ) 3 ]s econdary build-ing units. Fluorescence studies show that this MOF can sensitively and selectively recognize Al 3 + via af luorescencee nhancement effect, and the detection limit is 0.048 ppm. Furthermore, JXUST-1 displays relativelyg ood thermal and chemicals tabilities as well as reusability.A ll these results suggest JXUST-1 to be ah ighly selectivea nd recyclable luminescent sensing material for the detection of Al 3 + .[a] S.

Three metal‐organic frameworks {[Cd(L)(glu)]⋅3 H2O}∞ (1), {[Cd2(L)2(adi)2]⋅5 H2O}∞ (2) and {[Cd(L)(sub)]⋅3 H2O⋅DMA }∞ (3) (L=pyridine‐3,5‐bis(5‐azabenzimidazole), H2glu=glutaric acid, H2adi=adipic acid and H2sub=suberic acid) were obtained under solvothermal conditions. Complex 1 shows a 2D (4,4) network constructing of Cd2‐glu and Cd‐L chains. Complex 2 presents a 2‐fold interpenetrating 3D framework with pcu topology. Complex 3 is a 3D framework with cds topology. Three complexes with versatile structures were obtained by changing aliphatic dicarboxylate ligands with different lengths based on a N‐rich ligand. Moreover, the fluorescence measurements indicate that complex 1 is a good multifunctional chemosensor for the detection of Cr2O72− and MnO4− anions by fluorescence quenching effect, and ethylenediamine by fluorescence enhancement effect, with detection limits of 1.196 ppm, 0.551 ppm and 64.572 ppm, respectively. Both complexes 2 and 3 can selectively sense Cr2O72− anion with detection limits of 1.126 ppm for 2 and 0.831 ppm for 3 by a fluorescence quenching effect.