Journal
DYES AND PIGMENTS
Volume 193, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109568
Keywords
Cr2O72-; Fluorescent sensor; Conjugated polymer; Ultra-sensitive detection; Farmland
Funding
- National Natural Science Foundation of China [52073128, 51762020]
- Jiangxi Province Technology Innovation Guidance Project [20203AEI003]
- Scientific Research Foundation for Doctors in Jiangxi Science and Technology Normal University [2017BSQD006]
- Projects for Postgraduate Innovation in Jiangxi [YC2020X29]
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The study developed an efficient Cr2O72- sensor P(Fmoc-Osu) which was successfully applied in farmland and demonstrated the ability to rapidly and accurately detect trace amounts of Cr2O72-.
Hexavalent chromium (Cr(VI)) pollution is related to human health, and the detection of its concentration has a decisive effect on pollution treatment. In this work, we designed a Cr2O72- sensor P(Fmoc-Osu) and applied it in farmland. In the boron trifluoride diethyl etherate solution, the monomer Fmoc-Osu was electropolymerized and obtained its conjugated polymer P(Fmoc-Osu). The introduction of succinimide and carbonic ester group in side chain enabled it to show high selectivity to Cr2O72- in comparison to anions and twenty amino acids. Furthermore, by taking advantage of the signal amplification effect of a conjugated polymer, P(Fmoc-Osu) could analyze Cr2O72- in trace amounts and the limit of detection was 8.3 fM. For agricultural application, we employed it in farmland water, soil, Chinese cabbage, carrot and the results showed a satisfactory result. All these results showed that P(Fmoc-Osu) is an efficient tool to detect Cr2O72- in practical application.
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