Preparations and characterizations of two MOFs constructed with hydroxylphenyl imidazole dicarboxylate

Using the hydrothermal reactions of Mn(II) and Ba(II) salts with 2-(3-hydroxylphenyl)-1H-imidazole-4,5-dicarboxylic acid (m-OHPhH₃IDC), two novel metal-organic frameworks, namely, {Mn(m-OHPhHIDC)(H₂O)]·2H₂O}_n (1) and {Ba(m-OHPhH₂IDC)₂(H₂O)₃] ·2H₂O}_n (2) have been synthesized and structurally characterized by single-crystal X-ray crystallography, elemental analyses, and IR spectroscopy. Complex 1 features a novel non-interpenetrated three-dimensional (3,4)-connected network with one-dimensional open channels. Complex 2 exhibits a two-dimensional layered structure with rhombic grids. The role of the central metals in the formation of final architectures has been discussed. Furthermore, luminescent and thermal properties of the two complexes have been studied.