Synthesis, Crystal Structure, and Characterization of a New Zinc Complex with Flexible Ligand (4-Amino-1,2,4-triazole-3,5-diyldithio)diacetic Acid and 4,4′-Bipyridine

Abstract

A new zinc coordination polymer, [Zn(atda)(4,4′-bipy)]_n (H₂atda = (4-amino-1,2,4-triazole-3,5-diyldithio)diacetic acid, 4,4′-bipy = 4,4′-bipyridine), was synthesized by rheological phase reaction method and characterized by elemental analysis, IR, UV and single-crystal X-ray diffraction. The results reveal that it possesses three-dimensional (3D) solid-state structure. The Zn(II) inos are interlinked by bridging of atda² ligands and 1D [Zn(atda)]_n double chains are constructed, which are further connected together by the coordination of 4,4′-bipy molecules and 2D double layered structure are generated. Hydrogen-bonding interaction exists between the layers, resulting in the formation of 3D supramolecular structure. In addition, thermal stability and fluorescent property were studied.

Keywords:

• crystal structure
• flexible carboxylate ligand
• photoluminescence
• Zn(II) complex

Acknowledgments

This work was supported by the National Natural Science Foundation of China (Nos. 20871106, 90610001 and 20471053), the Base and Cutting-edge Technology Research Project of Henan Province (092300410033), the Foundation for Young Backbone Teacher of Henan Colleges and Universities in 2008 (No.198), and the Natural Science Research Assistance Program from the Education Department of Henan Province (2009A150007, 2009A430024).