Analytical Chemistry Research Lab., Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran.
Luminescence. 2013 Jul-Aug;28(4):503-9. doi: 10.1002/bio.2484. Epub 2013 Feb 28.
D-penicillamine-capped cadmium telluride quantum dots (DPA-capped CdTe QDs) were synthesized as the new fluorescent semiconductor nanocrystal in aqueous solution. Fourier transmission infrared spectroscopy, X-ray diffraction, transmission electron microscopy, ultraviolet-visible and photoluminescence spectroscopy were used for characterization of the QDs. Based on the quenching effect of Cu(2+) ions on the fluorescence intensity of DPA-capped CdTe QDs, a new fluorometric sensor for copper(II) detection was developed that showed good linearity over the concentration range 5 × 10(-9)-3 × 10(-6) M with the detection limit 0.4 × 10(-9) M. Owing to the strong affinity of the DPA to copper(II), the sensor showed appropriate selectivity for copper(II) compared with conventional QDs. The DPA-capped CdTe QDs was successfully applied for determination of Cu(2+) concentration in river, well and tap waters with satisfactory results.
巯基丙酸（DPA）修饰的碲化镉量子点（DPA-capped CdTe QDs）在水溶液中被合成作为新的荧光半导体纳米晶体。傅里叶变换红外光谱、X 射线衍射、透射电子显微镜、紫外-可见和荧光光谱用于 QDs 的表征。基于 Cu(2+)离子对 DPA-capped CdTe QDs 荧光强度的猝灭效应，开发了一种用于铜（II）检测的新荧光传感器，该传感器在 5×10(-9)-3×10(-6) M 的浓度范围内表现出良好的线性，检测限为 0.4×10(-9) M。由于 DPA 与铜（II）的强亲和力，与传统 QDs 相比，该传感器对铜（II）具有适当的选择性。巯基丙酸（DPA）修饰的碲化镉量子点成功地应用于河流、井水和自来水中 Cu(2+)浓度的测定，结果令人满意。
