Organic–inorganic hybrid supramolecular assembly through the highest connectivity of a Wells–Dawson molybdoarsenate

• {As2Mo18} cluster attracts 14 bimyb ligands at its periphery via weak interaction.
• The ligands are further embraced by 22 Dawson anions to form 3D supramolecular nets.
• Compound 1 represents the highest connectivity of Dawson molybdoarsenate.
• Compound 1 shows bifunctional electrocatalytic behavior.
• Compound 1 exhibits highly-efficient degradation ability for MB under UV light.

An unusual supramolecular hybrid material based on the Dawson molybdoarsenate, (H2bimyb)3(As2Mo18O62) (1) (bimyb = 1,4-Bis(imidazol-l-ylmethyl) benze) has been hydrothermally synthesized and characterized by elemental analysis, IR, TG, UV, XRD, and single-crystal X-ray diffraction. In compound 1, the {As2Mo18O62} cluster uses its surface oxygen atoms to attract 14 bimyb ligands, which are further surrounded by 22 Dawson polyanions via strong supramolecular interactions to form close-packed 3D supramolecular networks with a (1491)(510)(46) topology structure. Compound 1 represents the highest connectivity of Dawson molybdoarsenate. In addition, compound 1 exhibits bifunctional electrocatalytic behaviors for oxidation of ascorbic acid (AA) and reduction of hydrogen peroxide (H2O2), as well as high-efficient degradation ability for typical dye MB under UV light.

Organic ligand bimyb is firstly introduced into the {As2Mo18} hybrid system to yield a close-packed 3D supramolecular network. Compound 1 represents the highest connectivity of Dawson molybdoarsenate, which exhibits bifunctional electrocatalytic behavior for oxidation of AA and reduction of H2O2, as well as high-efficient degradation ability for MB under UV light.Figure optionsDownload as PowerPoint slide