Synthesis and characterization of two Cd (II) complexes constructed with tricarboxylic acids and as a fluorescent probe of iron ions

摘要

Tricarboxylic acid 3,5-bis(-carboxy-phenoxy) benzoic acid (H(3)BCPBA) 1,5-bis(imidazol-1-yl) benzene(bib) ligands and cadmium nitrate were used to synthesize two new metal-organic frameworks with different structure under the hydrothermal and solvent thermal conditions, namely [Cd(HBCPBA)(bip)](n) (1) and [Cd-2(HBCPBA)(2)(bip)(0.5)](n) (2). We determined the structure of two metal-organic frameworks by XRD, and characterized their structures by TG and powder X-ray diffraction (PXRD). Also we tested the fluorescence properties of the two coordination polymers at room temperature. The results showed the Complex 1 crystallizes in the Hexagonal space group P6(5), with tentacle structure. Complex 2 crystallizes in the Monoclinic space group P2(1)/c, with a layer of three interdigitated structure. Fluorescence test results show that these two complexes can be used as fluorescent probes to selectively detect and identify Fe3+ ions in water.