Dinuclear Zn(II) and Hg(II) complexes of an angular dipyridyl ligand: syntheses, crystal structures, and properties

作者：Zhu, Shu; Sun, Xi-Meng; Li, Yun-Zhong; Wu, Ben-Lai^*; Zhang, Hong-Yun

来源：Journal of Coordination Chemistry, 2010, 63(24): 4236-4244.

DOI：10.1080/00958972.2010.531714

• Angular dipyridyl ligand
• Crystal structure
• Dinuclear complex
• Fluorescence property

The angular polytopic dipyridyl ligand 2,6-bis(quinoline-2-carboxamido)pyridine (H2L) was prepared. Assemblies of H2L with ZnAc2 and HgAc2 resulted in two new dinuclear complexes [Zn2(L)(Ac)2] center dot 1.5H2O center dot 0.5CH3OH (1) and [Hg2(L)(Ac)2] center dot 5H2O center dot CH3OH (2) where the doubly deprotonated L2- bi-chelate as -kN,N' : kN'',N''', bridging the two metal centers (Ac = acetate). In 1, the two Zn(II) ions are also doubly bridged by two Ac ions in a -kO : kO' coordination, and thus each metal center adopts a distorted tetrahedral geometry. In 2, each Ac ion is only terminal to Hg(II), in a rare distorted triangular or T-shaped coordination geometry. Free H2L, 1, and 2 emit interesting bluish-green fluorescence with strong intensities. Thermogravimetric analysis of 1 shows that the dinuclear structure of 1 is stable to 382 degrees C.

• 出版日期2010
• 单位郑州大学