Back to Search
Start Over
A polypyrrole-coated eightfold-helical Wells–Dawson POM-based Cu-FKZ framework for enhanced colorimetric sensing.
- Source :
-
Analyst . 6/7/2020, Vol. 145 Issue 11, p4021-4030. 10p. - Publication Year :
- 2020
-
Abstract
- 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, [Cu9(FKZ)12(H2O)8][H3P2W18O62]2·4H2O (CuFKZP2W18) (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 CuFKZP2W18/PPy(n) nanocomposites (n = 7%, 15%, 30%) via a facile in situ oxidation polymerization process. All the results indicate that CuFKZP2W18/PPy(15%) as a colorimetric biosensor exhibits lower limits of detection (0.07 μM towards H2O2 and 0.627 μM towards ascorbic acid), smaller Km values (0.106 mM for H2O2 and 0.042 mM for o-phenylenediamine) and higher sensitivity (0.0227 1 μM−1 towards H2O2 and 0.0025 1 μM−1 to ascorbic acid) than most reported enzyme mimetics to the best of our knowledge. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POLYPYRROLE
*VITAMIN C
*METAL-organic frameworks
*DETECTION limit
*POLYMERIZATION
Subjects
Details
- Language :
- English
- ISSN :
- 00032654
- Volume :
- 145
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Analyst
- Publication Type :
- Academic Journal
- Accession number :
- 143550823
- Full Text :
- https://doi.org/10.1039/d0an00402b