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A polypyrrole-coated eightfold-helical Wells–Dawson POM-based Cu-FKZ framework for enhanced colorimetric sensing by Qian Li; Mingqi Xu; Xiao Li; Shuxian Li; Liran Hou; Yuhao Chen; Jingquan Sha is a Chemistry article available to read on EtoBox.

What is A polypyrrole-coated eightfold-helical Wells–Dawson POM-based Cu-FKZ framework for enhanced colorimetric sensing about?

To explore a novel colorimetric biosensor with high sensibility and selectivity, a new Wells-Dawson-type polyoxometalate (POM)-based metal-organic framework (MOF) with an eightfold helix, [Cu(FKZ)(HO)][HPWO]·4HO (CuFKZPW) (HFKZ = 1-(2,4-difluorophenyl)-1,1-bis[(1H-1,2,4-triazol-1-yl)methyl] ethanol), was successfully synthesized; then, polypyrrole (PPy) was introduced to fabricate CuFKZPW/PPy(n) nanocomposites (n = 7%, 15%, 30%) via a facile in situ oxidation polymerization process. All the results indicate that CuFKZPW/PPy(15%) as a colorimetric biosensor exhibits lower limits of detection (0.07 μM towards HO and 0.627 μM towards ascorbic acid), smaller K values (0.106 mM for HO and 0.042 mM for o-phenylenediamine) and higher sensitivity (0.0227 1 μM towards HO and 0.0025 1 μM to ascorbic acid) than most reported enzyme mimetics to the best of our knowledge.

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Author

Qian Li; Mingqi Xu; Xiao Li; Shuxian Li; Liran Hou; Yuhao Chen; Jingquan Sha

Publisher

Royal Society of Chemistry; The Royal Society of Chemistry; Royal Society of Chemistry (RSC) (ISSN 0003-2654)

Published

2020

Language

EN

Field

Chemistry (Physical Sciences)