A helix-based cobalt(II) coordination polymer with mixed ligands of homophthalic acid and 2,5-Bis(4′-pyridyl)-1,3,4-oxadiazole: synthesis, structure and magnetic property

Abstract

A novel Cobalt(II) coordination polymer formulated as [Co(hmph)(4-bpo)(H₂O)]_n (1) was obtained through hydrothermal method, and then characterized by single-crystal X-ray diffraction, elemental analysis and powder X-ray diffraction (H₂hmph = homophthalic acid, 4-bpo = 2,5-bis(4′-pyridyl)-1,3,4-oxadiazole). Complex 1 displays a three-dimensional architecture based on interweaving helix chains, which can be defined as a 4-connected uoc network with the Schläfli symbol of (4².8⁴). TGA experiment reveals that complex 1 can maintain its integrity until 214 °C. Furthermore, the magnetic data indicate there is weak antiferromagnetic interaction between the neighbor Co(II) atoms in the metal-carboxylate chain.

Keywords:

• Helix-based coordination polymer
• homophthalic acid
• 2,5-bis(4′-pyridyl)-1,3,4-oxadiazole

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Natural Science Foundation of China. (Grant No. 21571093).