A Stable Polyoxometalate-Pillared Metal-Organic Framework for Proton-Conducting and Colorimetric Biosensing

Chemistry. 2015 Aug 10;21(33):11894-8. doi: 10.1002/chem.201501515. Epub 2015 Jul 14.

Abstract

A stable metal-organic framework pillared by Keggin-type polyoxometalate, Cu6 (Trz)10 (H2O)4 [H2 SiW12 O40 ]⋅8 H2O (Trz=1,2,4-triazole) (1), has been prepared under hydrothermal condition. The 2D layer structure with a 22-member ring was formed by Cu(2+) ions, which are connected with each other via the Trz ligands on the ab plane. Thus, the 2D layers are further interconnected through Keggin polyoxoanions to generate a 3D porous network with a small 1D channel. Moreover, the presence of polyoxoanions make it exhibit selective adsorption of water and proton-conducting properties. Additionally it showed efficient intrinsic peroxidase-like activity, providing a simple and sensitive colorimetric assay to detect H2O2 .

Keywords: colorimetric biosensing; metal-organic framework; polyoxometalates; proton conductivity; stability.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biosensing Techniques / methods*
  • Colorimetry / methods*
  • Coordination Complexes / chemistry*
  • Crystallography, X-Ray
  • Ions / chemistry*
  • Models, Molecular
  • Tungsten Compounds / chemistry*

Substances

  • Coordination Complexes
  • Ions
  • Tungsten Compounds
  • polyoxometalate I