Selective recognition of dysprosium(III) ions by enhanced chemiluminescence CdSe quantum dots

• The intensity of the chemiluminescence reaction of CdSe quantum dots enhances with addition Dy3+ ion.
• The chemiluminescence reaction of CdSe quantum dots shows high selectivity and sensitivity to Dy3+ ion.
• The sensor has detection limit of 6.0 × 10−8 M for Dy3+ ions with linear range 8.3 × 10−7 M–5.0 × 10−6 M.

The intensity of emitted light from CdSe quantum dots (QDs)–H2O2 is described as a novel chemiluminescence (CL) reaction for determination of dysprosium. This reaction is based on the catalytic effect of Dy3+ ions, causing a significant increase in the light emission, as a result of the reaction of quantum dots (QDs) with hydrogen peroxide. In the optimum conditions, this method was satisfactorily described by linear calibration curve in the range of 8.3 × 10−7–5.0 × 10−6 M, the detection limit of 6.0 × 10−8 M, and the relative standard deviation for five determinations of 2.5 × 10−6 M Dy3+ 3.2%. The main experimental advantage of the proposed method is its selective to Dy3+ ions compared with common coexisting cations, therefore, it was successfully applied for the determination of dysprosium ions in water samples.

The intensity of emitted light from CdSe quantum dots–H2O2 is described as a novel chemiluminescence (CL) reaction for determination of dysprosium. This reaction is based on the catalytic effect of Dy3+ions, causing a significant increase in the light emission, as a result of the reaction of quantum dots (QDs) with hydrogen peroxide.Figure optionsDownload as PowerPoint slide