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
摘要:
Three new complexes with the formulas [Cd(bmi)(2)I-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 mu(2)-bridging mode with N atoms from imidazole and benzotriazol rings simultaneously. Additionally, their fluorescent properties also have been determined. (C) 2010 Elsevier B.V. All rights reserved.