Syntheses, Crystal Structure, and Luminescence Properties of Three Metal–Organic Compounds Bearing Diverse Dimensionalities Based on Mixed N- and O-Donor Organic Ligands

Abstract

Three new MOFs, namely [Ni(pip)(H2O)2] (1), [Ba(pip)(H2O)] (2), [Zn(pip)] (3), based on 6-(3-pyridyl)isophthalic acid (H2pip) were obtained and characterized by single-crystal X-ray diffraction, elemental analyses, PXRD, IR and TGA. By adjusting the reaction solvent, temperature and selecting different metal centers, compounds 1 and 2 possess 1D and 2D network, respectively, compound 3 show a 3D network containing a paddlewheel secondary building unit [SBU, Zn2(COO)4] with the Schlafli symbol (4·62)2(42·610·83). The structural differences among compounds 1–3 exhibit the backbone of such mixed N- and O-donor atoms organic ligands can be used to construct diverse dimensional MOFs by adjusting the reaction environment. Furthermore, the luminescence properties of compounds 2 and 3 were investigated, and both of them exhibit intense fluorescent emissions in the solid state at room temperature.