Two novel 3D microporous heterometallic 3d–4f coordination frameworks with unique (7, 8)-connected topology: Synthesis, crystal structure and magnetic properties

Two new 3D 3d–4f heterometallic microporous metal-organic frameworks, named, [Ln2Ni(Himdc)2(aip)2(H2O)4]·6H2O [Ln = Nd (1), La (2); H3imdc = imidazole-4,5-dicarboxy acid; aip = 5-aminoisophthalic acid], have been successfully synthesized through the reaction of Ln2O3, NiSO4·6H2O, H3imdc, aip and H2O. Compounds 1 and 2 are isomorphic, displaying rare interesting 3D heterometallic networks with (7, 8)-connected topology based on the linkages of 2D layers and 1D zigzag chains. In addition, the magnetic properties of the two compounds have been investigated.

Graphical abstractThe 2D layer structure based on 1D zigzag chains and Ni(II) centers, and further linked by the aip ligands to form interesting 3D microporous frameworks.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Two novel 3D heterometallic microporous complexes have been synthesized. ► The 3D heterometallic network with (7, 8)-connected topology. ► Both complexes exhibit antiferromagnetic behavior.