Self-assembly of three Cd(II) complexes: From 0-D to 1-D and 2-D structures based on 1-((benzotriazol-1-yl)methyl)-1- H-1,3-imidazole ligand and different anions

Abstract

Three new complexes with the formulas [Cd(bmi) 2I 2] ( 1), [Cd(bmi) 2(Cl) 2] n ( 2) and [Cd(bmi) 2(SCN) 2] n ( 3) have been obtained through the self-assembly of an unsymmetrical ligand 1-((benzotriazol-1-yl)methyl)-1- H-1,3-imidazole (bmi) with Cd(II) salts at room temperature. Single crystal X-ray diffraction determination shows that complex 1 possesses mononuclear structure, complex 2 displays 1-D chain structure constructed by chloride bridging Cd(II) ions, and complex 3 exhibits 2-D grid network structure. In complexes 1 and 2, the unsymmetrical bmi ligands coordinate to metal ions as monodentate mode with the N atom from imidazole ring in preference to the N atom from benzotriazol ring. While in complex 3, bmi ligands coordinate to metal ions as μ 2-bridging mode with N atoms from imidazole and benzotriazol rings simultaneously. Additionally, their fluorescent properties also have been determined.