Solvothermal synthesis, structures and properties of two new octamolybdate-based compounds with tetrazole- and pyridyl-containing asymmetric amide ligands

•Two new octamolybdate-based compounds were solvothermally synthesized.•2 features a 0D H4{[Mo8O26](PIA)2]} cluster containing MoN bonds.•2 is a two-fold interpenetrating 3D metal-organic framework templated by [Mo8O26]4 − anions.•The 3D framework of 2 represents an interesting 4-connected lvt topological net.•2 shows excellent electrocatalytic, photocatalytic activities and luminescent properties.

The solvothermal reactions of tetrazole- and pyridyl-containing asymmetric amide ligands [N-(pyridin-3-yl)isonicotinamide (PIA) and 3-(1H-tetrazole-1-acetic acid amido)pyridine (TAAP)] with Zn(NO3)2 in the presence of [Mo7O24]6 − anions lead to the formation of two new compounds, namely H4[(Mo8O26)(PIA)2]·H2O (1) and H4[Zn2(TAAP)4(H2O)4](Mo8O26)2·16H2O (2), which have been characterized by single-crystal X-ray diffraction, IR spectra, elemental analysis, TGA and PXRD analysis. Compound 1 is a 3D supramolecular structure derived from the 0D [(Mo8O26)(PIA)] cluster containing MoN bond. Compound 2 features a two-fold interpenetrating 3D network with [Mo8O26]4 − anions as templates and possess 4-connected lvt net. Furthermore, the electrochemical, photocatalysis and luminescent properties of compound 2 have been investigated.

Graphical abstractTwo octamolybdate-based compounds with different structures have been solvothermally synthesized by only using two different N-donor amide ligands. Compound 1 features a 0D H4{[Mo8O26](PIA)2]} cluster containing MoN bonds, which further interlinked by hydrogen bonding interaction to yield a 3D supramolecular structure. Compound 2 is a two-fold interpenetrating 3D network with [Mo8O26]4 − anions as templates and possess 4-connected lvt net.Figure optionsDownload full-size imageDownload as PowerPoint slide