A Three-Dimensional Heterometallic Cu^II–Gd^III Coordination Polymer: Hydrothermal Synthesis, Crystal Structure, Thermal and Magnetic Properties

Abstract

A new 3d-4f coordination polymer, {[Gd₂Cu(PDC)₂(SO₄)₂ (H₂O)₆]·2H₂O}_n (I), has been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. The X-ray diffraction analysis reveals that I crystallizes in triclinic system, space group P – 1. Unit cell parameters for I are a = 6.354(2), b = 10.027(2), c = 10.244(3) Å, α = 95.054(2)°, β = 95.098(1)°, γ = 99.818(1)°, V = 637.0(4) Å3, Z = 1. The compound is a three-dimensional network structure in which infinite lanthanide-carboxylate chains are linked by [Cu(SO4)2]2⁻ metalloligands to form a mixed-metal coordination network. The magnetic measurements reveal antiferromagnetic behaviors of the compound.

Keywords:

• 3d-4f hybrid polymer
• hydrothermal synthesis
• magnetic property
• pyridine-3
• 5-dicarboxylate

Acknowledgments

The authors acknowledge the Natural Science Foundation of China (No. 21172105) and the Foundation of the Education Department of Henan Province (No. 2011A150021) for the financial support.