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

Two coordination polymers, {[Mn(1,10-phen)(2)(3,4-H(2)bptc)] center dot (H2O)}(2n) (1) and {[Co-2(1,10-phen)( 3,4-bptc)(H2O)(2)] center dot H2O}(n) (2) (3,4-H(4)bptc = 3,3',4,4'-biphenyltetracarboxylic acid, 1,10-phen 1,10-phenanthroline), have been prepared and structurally characterized. In both compounds, 3,4-H(2)bptc(2-) and 3,4-bptc(4-) 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 bpta(4-) 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.