Ag(I) coordination polymer with pyrazine sulfonic acid: synthesis, crystal structure, and fluorescence property

Abstract

A one-dimensional rigid, linear Ag(I) coordination polymer with pyrazine sulfonic acid, [Ag₂L₂ · H₂O] _n (L = pyrazine sulfonic acid) has been synthesized and characterized by elemental analyses, infrared spectroscopy, thermogravimetric analysis, and X-ray crystallography. The structure determination shows Ag(I) centers linked by bridging pyrazine ligands to give a double-chain structure sustained by weak Ag-O and Ag-N interactions. The sulfonate and pyrazine are all involved in hydrogen bonding interaction. The interactions combine with weak π-π stacking to play deciding roles defining the supramolecular structures. A powder X-ray diffraction study implies good phase purity. Solid-state fluorescence quenching and thermal stability are also discussed.

Keywords:

• Ag(I) coordination polymer
• Pyrazine sulfonic acid
• Crystal structure
• Fluorescence analysis

Acknowledgments

The authors acknowledge the financial support from Guangxi Natural Science Foundation of China (Grant Nos. 0991293 and 2010GXNSFD013017), Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Guangxi Normal University), Ministry of Education of China (No. CMEMR2011-13), and the Scientific research and technological development project of GuiLin (No. 20110330).