Analytical Methods, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Trifluralin, a widely used dinitroaniline herbicide, poses significant toxic risks, necessitating the development of rapid detection methods for food safety. In this study, we prepared ultrathin two-dimensional triphenylamine porous organic nanosheets (TPA-PONs) through facile liquid-phase exfoliation process. The TPA-PONs, characterized by their exceptional fluorescence properties and nanoscale thickness (1.65 ± 0.3 nm), demonstrated remarkable quenching response upon exposure to trifluralin. Spectroscopic analysis combined with DFT calculations revealed that mechanism is driven electron energy transfer. TPA-PONs-based sensor exhibited linear trifluralin concentrations ranging from 0.01 10.0 μmol L-1 limit as low 3.50 nmol L-1. Additionally, was applied detect residues in vegetables, achieving recoveries 89.08-102.84%. To facilitate on-site detection, novel colorimetric film has been developed, enabling visual using smartphone. This dual-mode sensing platform holds potential enhancing safety monitoring.
Language: Английский