Structural and catalytic performance of a polyoxometalate-based hybrid compound

Abstract

By introducing long rigid ligands into polyoxometalate (POM) systems, a new POM-based hybrid compound with CDS topology, {[Cu(bpe)] 2 (H 2 SiMo 12 O 40 )}·(bpe)·2H 2 O (1) (bpe = bis(4-pyridyl)ethylene), has been hydrothermally synthesized and characterized by physical methods. Single crystal X-ray diffraction analysis shows that the ladder-like 1D structure of 1 is formed from Keggin clusters modified by the wavy ([Cu(bpe)] n ) chains. Compound 1 contains two types of tunnels along the a axis and the [1-10] axis, which are occupied by isolated bpe molecules. Compound 1 bulk-modified carbon-paste electrode (1-CPE) displays good electrocatalytic activity toward the reduction of nitrite and bromate, and photocatalytic activities indicate that 1 presents good degradation activity and may be a photocatalyst to decompose some organic dyes.