Syntheses and Crystal Structures of Three Cu(II) Complexes Based on 2,2′-(ethane-1,2-diyl)bis(1H-imidazole-4, 5-dicarboxylic Acid)

Abstract

Three new complexes, [Cu(H₄ebidc)(H₂O)₂] (1), [CuCl(H₅edidc)]·1/2(bbe)·CH₃OH (2) and [CuBr(H₅edidc)]·1/2 (bbe)·CH₃OH (3) (H₆ebidc = 2,2′-(ethane-1,2-diyl)bis(1H-imidazole-4,5-dicarboxylic acid) bbe = 1,2-bis(2-benzimidazolyl) ethane), have been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. The results show that all of the complexes possess mononuclear structure and each tetradentate ligand coordinates to Cu(II) ion in chelating fashion. Their 3D structures are packed through the hydrogen bonds in the solid state. Moreover, their fluorescent properties have been investigated at room temperature.

Keywords:

• 2
• 2′-(ethane-1
• 2-diyl)bis(1H-imidazole-4
• 5-dicarboxy- lic acid)
• Cu(II) complex
• crystal structure

Acknowledgments

The authors gratefully acknowledge the financial support by the National Natural Science Foundation of China (Nos. J0830412).