Two unusual 3D honeycomb networks based on Wells-Dawson arsenomolybdates with d transition-metal-pyrazole connectors.

Herein, two Wells -Dawson-type arsenomolybdates, formulated as [Cu(pyr)][AsMoO] (1) and [Ag(pyr)][AsMoO] (2) (pyr = pyrazole), were hydrothermally synthesized and structurally characterized via single-crystal X-ray diffraction, elemental analysis, IR and UV-vis-NIR spectroscopies, XPS, XRD, and TG analysis. The structural analysis indicated that compounds 1 and 2 were isomorphic. They are the first reported 3D honeycomb structures of Wells-Dawson-type arsenomolybdates.