A new two-dimensional Cd^IIcoordination polymer based on 2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole and benzene-1,2-dicarboxylate: synthesis, crystal structure and characterization

Abstract

In the construction of coordination polymers, many factors can influence the formation of the final architectures, such as the nature of the metal centres, the organic ligands and the counter-anions. In the coordination polymer poly[aqua(μ-benzene-1,2-dicarboxylato-κO,O:O,O)[μ-2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole-κN:N]cadmium(II)], [Cd(CHN)(CHO)(HO)] or [Cd(immb)(1,2-bdic)(HO)], each Cd ion is seven-coordinated by two N atoms from two symmetry-related 2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole (immb) ligands, by four O atoms from two symmetry-related benzene-1,2-dicarboxylate (1,2-bdic) ligands and by one water molecule, leading to a CdNO distorted pentagonal bipyramidal coordination environment. The immb and 1,2-bdic ligands bridge Cd ions and form a two-dimensional network structure. O-H...O and N-H...O hydrogen bonds stabilize the structure. In addition, the IR spectroscopic properties, PXRD patterns, thermogravimetric behaviour and fluorescence properties of the title polymer have been investigated.

Three-Dimensional Zn(II) Complex Based on 2-[(1H-Imidazol-1-yl)Methyl]-6-Methyl-1H- Benzimidazole and Aliphatic Carboxylate

“…[7][8][9][10] Among the reported immb-based complexes, one complex has been obtained using one type of immb ligand, 7 and five complexes have been obtained using immb and aromatic polycarboxylates. [7][8][9][10] Among the six immb-based complexes, there is no complex based on immb and aliphatic carboxylates. As an extension of previous work, we have used immb and succinic acid (H 2 suc) as mixed ligands to react with Zn(NO 3 ) 2 •6H 2 O and successfully obtained the new complex{[Zn(immb)(suc)]•H 2 O} n (1).…”