Syntheses, Crystal Structures, and Photoluminescent Properties of Zn(II) and Ag(I) Coordination Polymers Based on 1H-1,2,4-triazole-1-methylene-1H-benzimidazole

Abstract

The title ligand, 1H-1,2,4-triazole-1-methylene-1H-benzimida- zole (L), and its two new derivatives, [ZnL₂Cl₂]_n (1) and [AgL(NO₃)]_n (2), were synthesized and characterized by X-ray single diffraction, IR and elemental analysis. Owing to the greater distribution of the electron density associated with the benzimidazoyl and triazoyl units of L, the supramolecular frameworks of L, 1, and 2 are dominated by hydrogen bonding or π…π interactions in the solid state. In additional, the photoluminescent properties of L, 1, and 2 were also described.

Keywords:

• hydrogen bonding
• photoluminescence
• π…π interactions
• Zn(II) and Ag(I) complexes

Acknowledgments

The authors are thankful for support of this study by the National Natural Science Foundation of China (No. 20871099) and Gansu provincial Natural Science Foundation of China (No. 0710RJZA113).