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A novel sandwich polyoxometalate (POM) Na[WCo(HO)(CoWO)] and poly(vinylimidazolium) cation [PVIM] in combination with nitrogen-doped carbon nanotubes (NCNTs) was developed for a highly selective and ultrasensitive detection of dopamine. Conductively efficient heterogenization of CoPOM catalyst by PVIM over NCNTs provides the synergy between PVIM-POM catalyst and NCNTs as a conductive support which enhances the electron transport at the electrode/electrolyte interface and eliminates the interference of ascorbic acid (AA) at physiological pH (7.4). The novel PVIM-CoPOM/NCNT composite demonstrates a superior selectivity and sensitivity with a lowest detection limit of 500 pM (0.0005 μM) and a wide linear detection range of 0.0005-600 μM even in the presence of higher concentration of AA (500 μM).
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6045466 | PMC |
| http://dx.doi.org/10.1021/acsomega.7b02049 | DOI Listing |
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