Journal
MICROCHIMICA ACTA
Volume 183, Issue 12, Pages 3101-3109Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-016-1962-9
Keywords
Supramolecular imprint; Nanocomposite Catalytic amplification; 2-aminophenol; Electropolymerization; Scanning electronmicroscopy; XPS; Cyclic voltammetry; Vegetables
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Funding
- Fundamental Scientific Research Funds of the Chinese Academy of Tropical Agricultural Sciences [1630042015011, 1630042015009]
- Natural Science Foundation of Hainan Province of China [20152024]
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The authors describe an electrochemical sensor for the neonicotinoid insecticide imidacloprid (IMI) based on Pt-In catalytic nanocomposite film and Bromophenol blue amplification. The Pt-In nanocomposite film was deposited on the surface of a modified glassy carbon electrode. The composite molecularly imprinted polymer (MIP) was prepared by electro-polymerization using bromophenol blue doped o-aminophenol as functional monomer and 4-tert-butylcalix[6]arene-IMI supramolecular inclusion complex as template molecule. The experimental results showed that the current intensity of IMI was clearly amplified in the potential range from -0.3 to -1.8 V, because of the double amplification, based on the Pt-In film and Bromophenol blue catalysis. Moreover, the double recognition ability of the sensor, which relied on the MIP and the vacuum structure of 4-tert-butylcalix[6]arene, effectively increased the specific recognition performance. The feasibility of its practical applications has been demonstrated by the analysis of vegetable samples.
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