Hydrothermal syntheses, crystal structures and luminescence properties of Cd(II) coordination polymers based on 2-(pyridine-2-yl)-l H-imidazole-4,5-dicarboxylic acid

摘要

Two new supramolecular compounds, [Cd(H2PIDC)2(H2O)]-H2O (1) and {[Cd(H2PIDC)2(H2O)]-2H2O}_n (2) (H3PIDC = 2-(pyridine-2-yl)-lH-imidazole-4,5-dicarboxylicacid), have been synthesized under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction. Compound 1 contains discrete mononuclear structure, and compound 2 consists of one-dimensional left-and right-helix chains. Both are constructed into high-dimensional supramolecular frameworks by strong non-covalent hydrogen bonding and ji-rr stacking interactions. In addition, they were characterized by IR and elemental analysis, and their fluorescence properties in the solid state at room temperature have also been investigated.