Sensitive detection of picric acid in an aqueous solution using fluorescent nonconjugated polymer dots as fluorescent probes. (11th June 2021)

• Record Type: Journal Article
• Authors: Liu, Jinshui; Fu, Ting; Liu, Chenfu; Wu, Fangfei; Wang, Huaxin
• Is Part Of: Nanotechnology. Volume 32:Number 35(2021)
• Publication Date: 2021-06-11
• Subjects: fluorescent polymer dots -- picric acid -- polyethylenimine -- 1 -- 4-phthalaldehyde; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac04d1
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Nonconjugated polymer dots (NPDs) were successfully used as fluorescent probes to selectively and sensitively detect picric acid (PA). The NPDs were prepared from polyethylenimine and 1, 4-phthalaldehyde under mild conditions and had excitation and emission maxima of 351 and 474 nm, respectively. Fluorescence of the NPDs was efficiently quenched by PA through the inner filter effect because of the overlapping PA absorption band and NPD excitation spectrum. The NPDs allowed PA to be determined with a high degree of sensitivity. The linear range was 0–140 μ M and the detection limit was 0.5 μ M. The work involved developing a novel method for synthesizing NPDs and a promising platform for determining PA in environmental media.