Quantum dots (QDs) based fluorescence probe for the sensitive determination of kaempferol

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2014 English Publisher:Elsevier BVJournal:Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, volume 133, pages 66-72 (issn: 1386-1425,

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Authors: Xuanping, Tan; Shaopu, Liu; Yizhong, Shen; Youqiu, He; Jidong, Yang;

doi: 10.1016/j.saa.2014.05.032

pmid: 24929317

Quantum dots (QDs) based fluorescence probe for the sensitive determination of kaempferol

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Abstract

In this work, using the quenching of fluorescence of thioglycollic acid (TGA)-capped CdTe quantum dots (QDs), a novel method for the determination of kaempferol (KAE) has been developed. Under optimum conditions, a linear calibration plot of the quenched fluorescence intensity at 552nm against the concentration of KAE was observed in the range of 4-44μgmL(-1) with a detection limit (3σ/K) of 0.79μgmL(-1). In addition, the detailed reaction mechanism has also been proposed on the basis of electron transfer supported by ultraviolet-visible (UV-vis) absorption and fluorescence (FL) spectroscopy. The method has been applied for the determination of KAE in pharmaceutical preparations with satisfactory results. The proposed method manifested several advantages such as high sensitivity, short analysis time, low cost and ease of operation.

Related Organizations

Southeast University
China (People's Republic of)
Chongqing Three Gorges University
China (People's Republic of)

Keywords

Spectrometry, Fluorescence, Pharmaceutical Preparations, Limit of Detection, Thioglycolates, Quantum Dots, Cadmium Compounds, Spectrophotometry, Ultraviolet, Kaempferols, Tellurium, Fluorescent Dyes

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