Abstract
Two complexes formulated as {[Cd(btec)0.5(tmb)H2O]·4H2O}n (1) and {[Cd(H2btec)(tmb)(H2O)]·2H2O}n (2) (H4btec = 1,2,4,5-benzenetetracarboxylic acid, tmb = 2-((1H-1,2,4-triazol-1-yl)methyl)-1H-benzimidazole) have been synthesized and characterized by elemental analysis, IR, and single crystal X-ray diffraction. Single crystal X-ray diffraction shows that 1 has a 2-D layer structure in which tmb bridges and all of the carboxylates from 1,2,4,5-benzenetetracarboxylate chelate. In 2 Cd(II) ions are bridged by monodentate carboxylates leading to a 2-D layer structure with all tmb ligands coordinated monodentate to Cd(II), hanging at two sides of the layers. Complexes 1 and 2 are further extended to 3-D supramolecular structures by hydrogen bonding interactions. Luminescent properties have been investigated in the solid state at room temperature.
Acknowledgment
We gratefully acknowledge the financial support by the National Natural Science Foundation of China (No. J0830412).