4.7 Article

New Fluorescent Probes for the Sensitive Determination of Glyphosate in Food and Environmental Samples

期刊

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 69, 期 43, 页码 12661-12673

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.1c05246

关键词

fluorescent probe; glyphosate residue; Fe3+; Cu2+; coordination competition

资金

  1. Natural Science Foundation of China [51903032]
  2. Natural Science Foundation of Heilongjiang Province [LH2019B002]
  3. Postdoctoral Science Foundation of Heilongjiang Province [LBHZ19045]
  4. Young Talents Project of Northeast Agricultural University [18QC64]

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In this study, a dual-functional probe BHMH was synthesized and characterized for the simultaneous detection of Cu2+ and Fe3+, showing good sensitivity and selectivity for glyphosate. The probe quantitatively detected glyphosate in different samples and exhibited excellent imaging capabilities for living cells, especially for glyphosate for the first time.
In this paper, a dual-functional probe, 2-(benzothiazol)-4-(3-hydroxy-4-methylphenyl) imino phenol (BHMH), was synthesized and characterized for the simultaneous detection of Cu-2(+) and Fe3+ in dimethyl sulfoxide/4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (DMSO/HEPES) (1:4, v/v, pH = 6.0). The limits of detections (LODs) for Cu-2(+) and Fe3+ were 9.05 and 48 nM, respectively. Based on the competitive coordination, the complex BHMH-Cu2+/Fe3+ exhibited good sensitivity and selectivity for glyphosate. The LODs of BHMH-Cu2+ and BHMH-Fe3+ for glyphosate were 0.41 and 0.63 mu M, respectively. The probe quantitatively detected glyphosate in tap water, Songhua River water, local water and soil, and food samples. The colorimetric on-site glyphosate sensing through the probe BHMH-Cu2+ was also studied based on smartphones. BHMH and BHMH-Cu-2(+)/Fe3+ exhibited outstanding imaging capabilities for Cu-2(+), Fe3+, and glyphosate in living cells with low cytotoxicity, especially the first time for glyphosate.

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