Fluorescence Spectrometry and UV-Vis Absorption Spectra Analysis of Interaction of Core-shell CdTe/CdS QDs with Palmatine Chloride and Its Applications

doi:10.3969/j.issn.0251-0790.2012.07.012

Abstract

Abstract: Core-shell CdTe/CdS quantum dots(QDs) were synthesized using mercaptoacetic acid as stabilizer. A novel method for the determination of palmatine chloride(PC) was developed based on the quenching of the fluorescence of CdTe/CdS QDs at an excitation wavelength of 340 nm. Fluorescence spectrometry and ultraviolet-visible(UV-Vis) absorption spectra were utilized to study the interaction between CdTe/CdS QDs and PC. With the optimum reaction conditions of pH=7.4 Tris-HCl buffer solution, the quenched fluorescence intensity of CdTe/CdS QDs was linearly proportional to the concentration of PC with a correlation coefficient of r=0.997, and the detection limits were in the range of 25-1×10⁴ ng/mL and the detection limit(3σ) for PC was 7.7 ng/mL. This new method can quickly, simply, conveniently and quantitatively detemine PC.

Key words: CdTe/CdS quantum dots, Fluorescence quenching method, UV-Vis spectra, Palmatine chloride

CLC Number:

O657

TrendMD:

YIN Peng-Fei, GONG Hui-Ping, LI Ping-Ping, LIU Zheng-Qing, HE You-Qiu. Fluorescence Spectrometry and UV-Vis Absorption Spectra Analysis of Interaction of Core-shell CdTe/CdS QDs with Palmatine Chloride and Its Applications[J]. Chem. J. Chinese Universities, 2012, 33(07): 1432.

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Fluorescence Spectrometry and UV-Vis Absorption Spectra Analysis of Interaction of Core-shell CdTe/CdS QDs with Palmatine Chloride and Its Applications

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