In this article,
we designed a fluorometric sensor based on nitrogen-passivated
carbon dots infused with a molecularly imprinted polymer (N-CDs@MIP)
via a reverse microemulsion technique using 3-aminopropyltriethoxysilane
as a functional monomer, tetraethoxysilane as a cross-linker, and
2,4,6-trinitrophenol (TNP) as a template. The synthesized probe was
used for selective and sensitive detection of trace amounts of TNP.
The infusion of N-CDs (QY-21.6 percent) with a molecularly imprinted
polymer can increase the fluorescent sensor sensitivity to detect
TNP. Removal of template molecules leads to the formation of a molecularly
imprinted layer, and N-CDs@MIP fluorescence response was quenched
by TNP. The developed fluorescence probe shows a fine linear range
from 0.5 to 2.5 nM with a detection limit of 0.15 nM. The synthesized
fluorescent probe was used to analyze TNP in regular tap and lake
water samples.
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