Coordination polymers of Cu^II and Ni^II with 3-pyridin-3-yl-benzoate: crystal structures and magnetic properties

Abstract

Coordination polymers of Cu^II and Ni^II with 3-pyridin-3-yl-benzoic acid (3,3-Hpybz), {[Cu(3,3-pybz)₂(CH₃OH)]·(DMF)} _n (1) and {[Ni(3,3-pybz)₂(H₂O)] · (H₂O)} _n (2), were synthesized and characterized by single-crystal X-ray diffraction, thermogravimetric analyses, elemental analysis, and IR spectroscopy. In 1, Cu^II ions are linked by paired 3,3-pybz ligands to generate an infinite 1-D double-strand chain. However, Ni^II ions in 2 are linked by the 3,3-pybz to form a 2-D corrugated network with a simple (4,4) topology; these 2-D layers are further enlarged to form the final 3-D supramolecular edifice via strong aromatic π–π stacking interactions and O–H ··· O hydrogen bonds. Magnetic properties of 1 and 2 have also been investigated.

Keywords:

• Coordination polymer
• Magnetic properties
• Cobalt(II)
• Nickel(II)

Acknowledgments

This work was supported by the Nature Scientific Research Foundation of Shaanxi Provincial Education Office of China (No. 2010JK905).