title: D-penicillamine capped cadmium telluride quantum dots as a novel fluorometric sensor of copper(II).
abstract: 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.
authors: Analytical Chemistry Research Lab., Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran.
authors: Rahim
authors: R
authors: Mohammad-Rezaei
authors: Habib
authors: H
authors: Razmi
authors: Hossein
authors: H
authors: Abdolmohammad-Zadeh
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D003300:Copper / Q000032:analysis*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010396:Penicillamine / Q000737:chemistry*; D045663:Quantum Dots; D045483:Rivers / Q000737:chemistry; D012666:Semiconductors; D013691:Tellurium / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D005456:Fluorescent Dyes; D003300:Copper; D010396:Penicillamine; D013691:Tellurium; C028337:cadmium telluride
keywords: copper(II) detection; d-penicillamine; fluorescence quenching; quantum dots