Synthesis and photo-/electro-catalytic properties of a 3-D supramolecular framework based on [HxAs2Mo6O26](6−x)− and {Cu-diz} complexes

Abstract

Herein, an arsenomolybdate, {Cu(diz)4(H2O)2}[{Cu(diz)2(H2O)2}2{As2Mo6O26}]·2H2O (diz = 1,2-diazole) (1), has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, IR, TG, XPS, PXRD, and UV–Vis-NIR. The {Cu-diz} complexes link the [As2Mo6O26]6− polyoxoanions, forming a 1-D infinite chain. The 2-D layer is constructed from 1-D chains through hydrogen bonds. Adjacent layers and free {Cu(diz)4(H2O)2} complexes are fused through hydrogen bonding to form a 3-D topological framework with symbol of {414·610·84}{4}2. Compound 1 exhibits luminescence at room temperature, excellent degradation activity for four different organic dyes (RhB, MB, MO, and AP) under UV irradiation. The photocatalytic mechanism of 1 is discussed in detail. Furthermore, the electrocatalytic activity of 1 toward hydrogen peroxide has also been studied.