Syntheses, structures, and properties of copper and cadmium complexes with quinoline-based benzimidazole

Article abstract of DOI:10.1080/00958972.2010.548862

A new tridentate ligand 2-((quinolin-8-yloxy)methyl)benzimidazole (L) and three coordination compounds, [CuLCl₂] (1), [CuL(H ₂O)(SO₄)· 2H₂O]_n (2), and {[Cd₂L₂Cl₄][CdLCl₂(H ₂O)]₂}·H₂O (3), have been synthesized and characterized. Single crystal structure analyses reveal extensive intermolecular hydrogen bonding, resulting in generation of 1-D-3-D supramolecular networks. Compounds 1 and 2 constitute the first examples of Cu complexes containing both 8-hydroxyquinoline and benzimidazole, while 3 represents the first Cd complex bearing this ligand. Complexes 1-3 show similar quasi-reversible electrochemical behaviors. Complex 2 exhibits a predominantly ferromagnetic interaction between copper centers, and 3 has good fluorescence and can be used as an optical material.