Syntheses, structures and properties of Zn(II) and Cu(II) complexes based on N2-2-methylenepyridinyl 1,2,3-triazole ligand

•Four Zn(II) and Cu(II) 1,2,3-triazole complexes have been synthesized.•The anions lead to different molecular self-assembly for three Cu(II) complexes.•The properties of the complexes have been investigated.

Four new Zn(II) and Cu(II) coordinated polymers ([ZnL2N3]ClO4 (1), [Cu2L2(CH3CN)]Cl4 (2) [CuL](NO3)2 (3), [Cu(H2O)L](SO4) (4) L = 2-((4-phenyl-2H-1,2,3-triazol-2-yl)methyl) pyridine (ptmp)) have been reported. All the compounds have been characterized by IR spectrum, elemental analyses and X-ray crystallography diffraction. Single-crystal X-ray diffraction analyses show that one-dimensional polymers are formed in these four complexes. Chain-like structures are formed in complex 1, 2 and 3, which are connected by azide, chloride and nitrate anions, respectively. In complex 4, one-dimensional left-handed polymer is formed by a μ2-SO4 bridge. The fluorescent and electrochemical properties of these four complexes were investigated. It was found that these three Cu(II) complexes displayed a quenching of fluorescence, while Zn(II) complex exhibited a clear enhanced fluorescence.

Graphical abstractFour metal coordination compounds based on N2-2-methylenepyridinyl 1,2,3-triazole ligand have been synthesized and characterized. These anions play a pivotal role in the assembly of these supramolecular structures. The fluorescent and electrochemical properties of the complexes have been also investigated.Figure optionsDownload full-size imageDownload as PowerPoint slide