Synthesis, Structures, and Properties of a Series of New Coordination Polymers Built from 2-Ethyl-1H-imidazole-4,5-dicarboxylate Ligand

摘要

A series of new coordination polymers, namely, [Sr(H2EIDC)(2)(H2O)(2)](n) (1),{[Pb(H2EIDC)(2)(H2O)](H2O)(3)}(n) (2), [Ag(H2EIDC)](n) (3), and [Ba(H2EIDC)(2)(H2O)](n) (4) (H2EIDC = 2-ethyl-1H-imidazole-4,5-dicarboxylate), were synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, X-ray diffraction and thermogravimetric analyses. Complex 1 is a 2D infinite gridlike (4,4) topological layer structure. Complex 2 is a 2D corrugated layer constructed by Pb-II atoms and H2EIDC-anions. Complex 3 is a 2D corrugated sheet consisting of 1D chains linked by short Ag center dot center dot center dot Ag interactions, and the three complexes are extended into 3D supramolecular structures by weak intermolecular forces such as hydrogen bonds and pi-pi stacking interactions. Complex 4 exhibits a 3D framework with 1D channels. Furthermore, the luminescent properties of complexes 1, 2, and 3 are also investigated.

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