A magnetic molecular imprinting-based fluorescence probe for sensitive and selective detection of 2,4-D herbicide.
Baiquan ChuZeping YuLei MengNa XuPublished in: Luminescence : the journal of biological and chemical luminescence (2023)
A new magnetic molecular imprinting-based turn-on fluorescence probe (Fe 3 O 4 NPs@SiO 2 @NBD@MIPs) has been synthesized via a facile sol-gel polymerization for the detection of 2,4-dichlorophenoxyacetic acid (2,4-D). Based on the photoinduced electron transfer (PET) of nitrobenzoxadiazole (NBD), 2,4-D can be recognized by enhancement of NBD fluorescence. With the presence of Fe 3 O 4 in the core of the probe, this sensor can also be reused many times using magnetic aggregation methods. After the addition of various concentrations of 2,4-D, the fluorescence peak at 530 nm (excitation of 468 nm) increased linearly ranging from 0.1 to 3 μM with a detection limit of 0.023 μM. This sensing system is believed to be available for detecting 2,4-D in real samples, with high recovery rates ranging from 94% to 108% for three spike levels of 2,4-D with precisions below 5%.
Keyphrases
- single molecule
- living cells
- energy transfer
- quantum dots
- electron transfer
- loop mediated isothermal amplification
- molecularly imprinted
- real time pcr
- label free
- computed tomography
- photodynamic therapy
- sensitive detection
- fluorescent probe
- positron emission tomography
- gold nanoparticles
- simultaneous determination