Synthesis, structure, and magnetism of a new 2-D copper(II) complex based on two different dicarboxylates

Abstract

A new 2-D copper(II) complex, [Cu₂L¹L²(H₂O)₂] · 3H₂O (1) (H₂L¹ = 2,4-dibenzoylisophthalic acid and H₂L² = 2,5-dibenzoylterephthalic acid), has been synthesized by the reaction of copper(II) nitrate and two different dicarboxylates under hydrothermal conditions. This complex is characterized structurally by elemental analysis, IR spectra, thermogravimetric analysis, and X-ray diffraction. Complex 1 has a 2-D layer structure with (4⁴ · 6²) topology. The adjacent 2-D layers are further extended via O–H ··· O hydrogen bonds into a 3-D supramolecular structure; 1 shows antiferromagnetic interactions.

Keywords:

• Copper(II)
• Complex
• Dicarboxylate acid
• Supramolecular
• Antiferromagnetic

Acknowledgments

We gratefully acknowledge financial support by the NSF of China (nos. 21071027, 20771023), the China High-Tech Development 863 Program (no. 2007AA03Z218), and analysis and testing foundation of Northeast Normal University.