Hydrothermal syntheses, crystal structures and fluorescent properties of five transition metal-organic hybrids incorporating an unsymmetrical benzotriazole carboxylate ligand

作者：Zhang, Zhong^*; Hu, Kun; Shi, Yun-jia; Qin, Jin-man; Chen, Zi-lu; Liang, Fu-pei

来源：Transition Metal Chemistry, 2013, 38(3): 327-334.

DOI：10.1007/s11243-013-9697-5

• Hydrothermal synthesis
• Structural investigation
• Fluorescence
• Metal-organic hybrid
• 1H-1,2,3-Benzotriazole-1-propionic acid

The hydrothermal reactions of nitrate or chloride salts of Co(II), Zn(II), Cd(II), Hg(II) and Ag(I) with an unsymmetrical benzotriazole derivative 1H-1,2,3-benzotriazole-1-propionic acid (Hbtap) afforded five new metal-organic coordination polymers with formula of [M(btap)(2)(H2O)(2)] (n) (M = Co 1, Zn 2, Cd 3), [Hg(btap)Cl] (n) (4) and {[Ag(btap)]center dot H2O} (n) (5), which were characterized by X-ray diffraction and spectroscopic methods. The anionic btap(-) ligands in these complexes assume the same anti conformation, but show different coordination behaviors toward transition metal ions. Complexes 1, 2 and 3 are isostructural and reveal infinite one-dimensional (1D) looped-chain structures constructed by hexacoordinated metal centers and 2-connected btap(-) bridges. Complex 4 features 1D zigzag polymeric arrays, which are interlinked with each other resulting in a chiral three-dimensional (3D) 4-connected framework. In complex 5, the 3-connected ligands join Ag(I) atoms into a 1D ribbon motif. The photoluminescence spectra of three d(10) metal complexes 2, 3 and 4 were measured at room temperature. The emission peaks of these complexes resemble that of the free ligand and can be ascribed to the intraligand pi-pi* transitions.

• 出版日期2013-4
• 单位广西师范大学