Syntheses, structures, and magnetism of two coordination compounds with 3,3′,4,4′-biphenyltetracarboxylic acid and 1,10-phenanthroline

Abstract

Two coordination polymers, {[Mn(1,10-phen)₂(3,4-H₂bptc)] · (H₂O)}_{2 n} (1) and {[Co₂(1,10-phen)(3,4-bptc)(H₂O)₂] · H₂O} _n (2) (3,4-H₄bptc = 3,3′,4,4′-biphenyltetracarboxylic acid, 1,10-phen = 1,10-phenanthroline), have been prepared and structurally characterized. In both compounds, 3,4-H₂bptc^2– and 3,4-bptc⁴⁻ exhibit different coordination modes and lead to various architectures. Compound 1 displays 1-D zigzag chains constructed with hydrogen bonds. Compound 2 exhibits a 2-D layer constructed from bpta⁴⁻ between the dinuclear Co(II) units. The thermal stabilities and magnetic properties are also reported. In addition, 1 was explored as a luminescent material. The carboxylic oxygen atoms act as H-bond acceptors and donors forming a 1-D ladder-like arrangement.

Keywords:

• Coordination polymer
• 3,3′,4,4′-Biphenyltetracarboxylic acid
• Magnetic property

Acknowledgments

We are grateful to the National Science Foundation of China (Nos 20873100 and 21173168) and the Natural Science Foundation of Shaanxi Province (No. FF10091) for the financial support.