D‐penicillamine capped cadmium telluride quantum dots as a novel fluorometric sensor of copper(II). (28th February 2013)

• Record Type: Journal Article
• Authors: Mohammad‐Rezaei, Rahim; Razmi, Habib; Abdolmohammad‐Zadeh, Hossein
• Is Part Of: Luminescence. Volume 28:Number 4(2013:Jul./Aug.)
• Page Start: 503
• Page End: 509
• Publication Date: 2013-02-28
• Subjects: quantum dots -- d‐penicillamine -- fluorescence quenching -- copper(II) detection; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.2484
• Languages: English
• ISSNs: 1522-7235

Abstract

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. Copyright © 2013 John Wiley & Sons, Ltd.