Construction, PPy loading and photocatalytic performance of a polyoxometalate-templated metallacycle compound

Abstract

A polyoxometalate-templated metallacycle compound, [Ag₆trz₆][H₃PMo₁₂O₄₀]₂·6H₂O (trz = 1,2,3-triazole), has been isolated and structurally characterized. The compound represents the first example of a trigonal antiprism based metal-organic framework (MOFs) with complicated Zr₆Br₁₂ type topology, in which the trigonal antiprisms as building blocks are constructed by the Ag₆trz₆ space polygons and the bifunctional POMs (both as template and building block). In addition, to improve the photocatalytic activity of polyoxometalate-templated metallacycle compound, polypyrrole was loaded on its surface through a chemical oxidation polymerization process in situ. Finally, the photocatalytic activity of [Ag₆trz₆][H₃PMo₁₂O₄₀]₂ and PPy@[Ag₆trz₆][H₃PMo₁₂O₄₀]₂ under visible light was explored, and the results demonstrate that the PPy loading on the surface of POMs-based hybrid compound is feasible to improve their photocatalytic performance.

Keywords:

• Polyoxometalates
• metallacycle
• polypyrrole
• photocatalyst