Two- and Three-DimensionalDivalent Metal Coordination Polymers Constructed from a New TricarboxylateLinker and Dipyridyl Ligands.

Solvothermal reactions of an unsymmetrical tricarboxylicacid ligand, biphenyl-3,3′,5-tricarboxylic acid (H3L), with cobalt, nickel, and manganese salts in the presence of 1,2-bi(4-pyridyl)ethane(bpa), 1,2-bi(4-pyridyl)ethene (bpe), and 1,3-bi(4-pyridyl)propane(bpp) ligands produced four new coordination polymers, namely, {[Co2(HL)2(bpa)2(H2O)]}n(1), {[Co(HL)(bpe)]·H2O}n(2), {[Ni(HL)(bpa)]·H2O}n(3), and {[Mn3L2(H-bpp)(OH)(H2O)2]·2H2O}n(4). Complexes 1–4were structurally characterized byelemental analysis, infrared (IR) spectra, and X-ray single-crystaldiffraction. Complex 1exhibits a three-dimensional (3D)4-fold interpenetrating diamondoid framework. Complex 2is a two-dimensional (2D) layered structure with a (3,5)-connected(42.6)(42.67.8) topology and furtherstacks via hydrogen-bonding interactions to generate a 3D supramoleculararchitecture. Complex 3shows a 3D framework assembledby mutual interpenetration of neighboring 2D layers. Complex 4possesses a 3D framework composed of the trinuclear [Mn3(μ3-OH)]5牛겵 nodes witha (42.6)(42.6)(44.62.73.85.9) topology. In addition, there exist differenttypes of helical chains in complexes 1–3. Thermogravimetric properties of 1–4and magnetic properties of 4were also investigated.This study reveals that the H3L ligand can be used as aversatile building block for the construction of metal–organicframeworks. [ABSTRACT FROM AUTHOR]