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- W4205121090 abstract "A simple and green method for the synthesis of fluorescent carbon nanospheres (CNs) was proposed using chrysanthemum as a natural precursor and ethylenediamine as the co-reagent. The prepared CNs show strong blue fluorescence in water with quantum yield of 13.7 %, and distinguished fluorescent stability against photobleaching and ion strength. Meanwhile, the fluorescence signal of CNs is reversible and sensitive to temperature in the range of 20-80 °C, which makes CNs useful as a temperature sensor. More importantly, the CNs can serve as excellent fluorescent sensors for detecting MnO4- and Hg2+ with the detection limit of 0.72 and 0.26 μM, respectively. MnO4- quenches the fluorescence of CNs through inner filter effect and static quenching mechanism, while Hg2+ forms a stable complex with the amino group on the surface of CNs, resulting in the fluorescence quenching of CNs. However, the stronger affinity between Hg2+ and captopril (Cap) results in the fluorescence quenched by Hg2+ recovery after the addition of Cap. Thus, the CNs-Hg2+ system is employed as a novel sensitive and selective fluorescence turn-on sensor for Cap in the range of 0-75 μM. Inspired by the sensing results, the developed sensors were successfully used for the determination of MnO4-, Hg2+ in river water samples and Cap in the pharmaceutical and urine samples." @default.
- W4205121090 created "2022-01-25" @default.
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- W4205121090 date "2022-04-01" @default.
- W4205121090 modified "2023-10-14" @default.
- W4205121090 title "Green synthesis of fluorescent carbon nanospheres from chrysanthemum as a multifunctional sensor for permanganate, Hg(II), and captopril" @default.
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- W4205121090 doi "https://doi.org/10.1016/j.saa.2022.120886" @default.
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