Syntheses, Crystal Structures, and Fluorescent Properties of Two Cd(II) Coordination Polymers Based on 2-(1H-imidazole-1-ylmethyl)-1H-benzimidazole

Abstract

In the presence of KBr and Na₂S₂O₃, two new coordination polymers, {[Cd₂(μ₂-Br)₂Br₂(H₂O)₂(imb)₂]·2H₂O}_n (1) and {[Cd(S₂O₃)(imb)]·2DMF}_n (2), have been prepared through the reactions of Cd(NO₃)₂ with 2-(1H-imidazole-1-ylmethyl)-1H-benzimidazole (imb). A structural study reveals that 1 displays 1-D chain structure constructed by bromine anions and imb ligands bridging Cd(II) ions. While 2 exhibits a 2-D network structure in which the thiosulfate groups coordinate to Cd(II) ions with O and S atoms simultaneously. Additionally, their IR and fluorescent properties are investigated.

Keywords:

• Cd(II)-coordination polymer
• crystal structure
• fluorescent property

Acknowledgments

The authors gratefully acknowledge the financial support by the Education Department of Henan Province (2009A150029).