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  • Title: Determination of emodin by hexadecyl trimethyl ammonium bromide sensitized fluorescence quenching method of the derivatives of calix[4]arene.
    Author: Ma L, Zhu X.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2012 Sep; 95():246-51. PubMed ID: 22634417.
    Abstract:
    The fluorescence quenching effect of emodin (EMO) on the derivatives of p-tert-butyl-calix[4]arene with o-phenanthroline (TBCP) in 1.0% hexadecyl trimethyl ammonium bromide (CTAB) medium was investigated. The fluorescence of TBCP was quenched by EMO due to the formation of the weak fluorescent inclusion complex (EOM-TBCP), and the fluorescence quenching (ΔF=F(TBCP)-F(EMO-TBCP)) was sensitized in CTAB. Under the optimal conditions, the linear range of calibration curve for the determination of EMO was 1.17-23.40 μg/mL. The detection limit estimated and RSD was 0.34 μg/mL, 3.63% (n=3, c=4.74 μg/mL). The quantum yield Y(u) of TBCP was approximately 2.0 times higher in the presence of CTAB than that in the absence of CTAB. The method has been applied for the determination of EMO in samples with satisfactory results.
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