Syntheses, structures and magnetic properties of isonicotinate-bridged heterometallic Ln(III)–Cu(II) coordination polymers

Abstract

The heterometallic Ln(III)–Cu(II) coordination polymers [CuLn₂(IN)₈(H₂O)₄] _n (IN = isonicotinate, Ln = Gd (1), Dy (2), Er(3)) have been synthesized by hydrothermal reactions and characterized by elemental analysis, IR and single crystal X-ray diffraction. The compounds are isomorphous and crystallize in monoclinic space group P2₁/c, adopting a one-dimensional chain structure with alternately arranged [Ln₂(IN)₆(H₂O)₄] and [Cu(IN)₂] building blocks bridged by isonicotinates. Temperature-dependent magnetic susceptibility for complex 1 was studied, and a very weak ferromagnetic interaction between metal ions was observed.

Keywords:

• Copper
• Lanthanide
• Isonicotinic acid
• Heterometallic complex

Acknowledgement

This work is supported by the National Natural Science Foundation of China (No. 20461001) and the Education Department of Guangxi Province.