One-Dimensional Zinc and Cadmium Coordination Polymers Constructed by Dicyanamide Anions: Synthesis, Crystal Structure, and Fluorescent Property

Abstract

Two new one-dimensional coordination polymers, [Zn(L)₂ (C₂N₃)₂] _n and [Cd(L)₂(C₂N₃)₂] _n (L = 4-Cyanobenzylidene nicotinohydrazide, C₂N₃ = dicyanamide anions), have been synthesized and structurally characterized. These two compounds are isomorphs. Each metal center is coordinated to six nitrogen atoms from two L molecules and four dicyanamide anions, defining distorted octahedral coordination geometry. Dicyanamide anions acting as linear bridging ligands connect metal centers to form 1D chains along the crystallographic a axis. Furthermore, an interesting (3,4)-connected (8³)₂(8⁵.10)-tfc topology of supramolecular 3D networks through hydrogen bonds based on 1D chains is constructed. Luminescent property of the Zn(II) coordination polymer has also been studied.

Keywords:

• cadmium
• fluorescent property
• hydrogen bond
• one-dimensional coordination polymers
• zinc

Acknowledgments

We are grateful to the financial support by the Science and Technology Foundation of Henan Province, China.