Nickel(II) and manganese(II) metal–organic networks driven by 2,2′-bipyridine-5,5′-dicarboxylate blocks: synthesis, structural features, and magnetic properties

Abstract

Two compounds, namely a 2D coordination polymer {[Ni(µ 3-bpdc)(H2O)]·H2O} n (1) and a 3D metal–organic framework (MOF) [Mn(µ 4-bpdc)(phen)] n (2), were generated by a hydrothermal self-assembly from the corresponding metal(II) chlorides, 2,2′-bipyridine-5,5′-dicarboxylic acid (H2bpdc) as a main building block, and an optional ancillary 1,10-phenanthroline (phen) ligand. The obtained products were characterized by IR spectroscopy, elemental, thermogravimetric, powder and single-crystal X-ray diffraction analyses. Compound 1 possesses a 2D double-layered network with the plane SP KIa topology defined by the point symbol of (82.10), which is further extended into a 3D supramolecular architecture via hydrogen bonds. MOF 2 features a 3D net with the pts topology and point symbol of (42.84). The magnetic properties for both compounds were also investigated, indicating antiferromagnetic interactions between the adjacent metal ions. Two 2D and 3D metal–organic networks driven by a multifunctional building block were self-assembled and fully characterized; their structural, topological, and magnetic features were investigated.