Self-assembly, bifunctional electrocatalytic behavior, and photocatalytic property of host–guest metal-oxide-based coordination polymers

Abstract

A copper complex modified Mo-oxide hybrid network stabilized by Keggin polyoxoanion, [{Cu(bpy)₂}{Mo₁₂O₃₄(bpy)₁₂}][PMo₁₂O₄₀]₂ (bpy = 2,2ʹ is-bipyridine) (1) has been synthesized via self-assembly of simple starting materials. In 1, six [MoO₄(bpy)] complexes connect in two different corner-sharing modes to form triangles and linear trimer units, which interconnect alternately to form zigzag chains. {Cu(bpy)₂} segments connect the chains into 2-D layers, which are further joined into 3-D supramolecular networks with 1-D channels. The {PMo₁₂PO₄₀} as guest molecules are incorporated into the channels. Compound 1 exhibits bifunctional electrocatalytic behavior for oxidation of ascorbic acid and reduction of H₂O₂, as well as high-efficient degradation ability for typical dye methylene blue under UV light.

Keywords:

• Polyoxometalate
• coordination polymers
• electrocatalysis
• photocatalysis

Disclosure statement

No potential conflict of interest was reported by the authors.

Funding

This work was supported by the National Natural Science Foundation of China [grant number 21371042], [grant number 21271056]; the Ministry of Education and Specialised Research Fund for the Doctoral Program of Higher Education [grant number 20122329110001]; the Natural Science Foundation of Heilongjiang Province [grant number ZD2015001]; Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University) and Program for Scientific and Technological Innovation Team Construction in Universities of Heilongjiang Province [grant number 2011TD010].