College of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong, Shanxi, 030619, P. R. China.
School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 341000, P. R. China.
Chem Asian J. 2019 Dec 2;14(23):4420-4428. doi: 10.1002/asia.201901489. Epub 2019 Nov 28.
Three metal-organic frameworks {[Cd(L)(glu)]⋅3 H O} (1), {[Cd (L) (adi) ]⋅5 H O} (2) and {[Cd(L)(sub)]⋅3 H O⋅DMA } (3) (L=pyridine-3,5-bis(5-azabenzimidazole), H glu=glutaric acid, H adi=adipic acid and H sub=suberic acid) were obtained under solvothermal conditions. Complex 1 shows a 2D (4,4) network constructing of Cd -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 Cr O and MnO 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 Cr O anion with detection limits of 1.126 ppm for 2 and 0.831 ppm for 3 by a fluorescence quenching effect.
三种金属-有机骨架{[Cd(L)( glu)]⋅3H 2 O}（1）、{[Cd(L)( adi)]⋅5H 2 O}（2）和{[Cd(L)( sub)]⋅3H 2 O⋅DMA}（3）（L=吡啶-3,5-双（5-氮杂苯并咪唑），H glu=戊二酸，H adi=己二酸，H sub=壬二酸）是在溶剂热条件下得到的。配合物 1 表现出由 Cd-glu 和 Cd-L 链构成的二维（4,4）网络。配合物 2 呈现出具有 pcu 拓扑的 2 重互穿的 3D 骨架。配合物 3 是具有 cds 拓扑的 3D 骨架。通过改变脂肪族二羧酸配体的长度，得到了三种具有不同结构的配合物，这些配合物基于一个富氮配体。此外，荧光测量表明，配合物 1 是一种很好的多功能化学传感器，可以通过荧光猝灭效应检测 CrO 4 2-和 MnO 4 2-阴离子，以及通过荧光增强效应检测乙二胺，检测限分别为 1.196ppm、0.551ppm 和 64.572ppm。配合物 2 和 3 都可以通过荧光猝灭效应选择性地检测 CrO 4 2-阴离子，检测限分别为 1.126ppm（2）和 0.831ppm（3）。
