Three novel 3D pillared-layer molybdenum-oxide-based inorganic–organic hybrids constructed by tetranuclear Zn4/Co4/Mo4 metal clusters

•Pillared-layer molybdenum-oxide-based inorganic–organic hybrid compounds.•8-Connected net with tetranuclear metal clusters as building blocks.•Nonoxygen-bound ligand coordinate directly to Mo and metal ion simultaneously.•The first 3D bimetallic pillar-layer hybrid contain A- and B-type Mo4O132− subunits.

Three novel pillared-layer molybdenum-oxide-based inorganic–organic hybrids, namely, [Zn2(tyty)(μ3-OH)(MoO4)(H2O)] (1), [Co2(tyty)(μ3-OH)(MoO4)(H2O)] (2) and [Co(pytpy)2(Mo4O13)] (3) (Htyty = 1-(tetrazo-5-yl)-4-(triazo-1-yl)benzene, pytpy = 4′-(4-pyridyl)-4,2′:6′,4″-terpyridine), have been synthesized and characterized by elemental analyses, IR spectra, TG analyses and single-crystal X-ray diffraction. Compounds 1 and 2 are isostructural and display 3D pillared-layer frameworks based on bimetal-oxide layers pillared by the tyty ligands. Compound 3 shows a 3D pillared-layer framework constructed by pytpy coordinating directly to a molybdenum atom and Co atom simultaneously. Furthermore, the photoluminescence property of compound 1 and the magnetic properties of compounds 2 and 3 are discussed.

Graphical abstractThree pillared-layer molybdenum-oxide-based inorganic–organic hybrids have been prepared by self-assemblies of rigid/triangular N-containing ligands and bimetallic salts.Figure optionsDownload full-size imageDownload as PowerPoint slide