Copper-Doped CdSe/ZnS Quantum Dots: Controllable Photoactivated Copper(I) Cation Storage and Release Vectors for Catalysis

The first photoactivated doped quantum dot vector for metal‐ion release has been developed. A facile method for doping copper(I) cations within ZnS quantum dot shells was achieved through the use of metal‐dithiocarbamates, with Cu+ ions elucidated by X‐ray photoelectron spectroscopy. Photoexcitation...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2014-02, Vol.53 (6), p.1598-1601
Main Authors: Bear, Joseph C., Hollingsworth, Nathan, McNaughter, Paul D., Mayes, Andrew G., Ward, Michael B., Nann, Thomas, Hogarth, Graeme, Parkin, Ivan P.
Format: Article
Language:English
Subjects:
Cadmium selenides
Catalysis
Cations
click chemistry
Communications
copper catalysis
Core–Shell Materials
Doping
Electrons
Fluorescence
heterogeneous catalysis
Mathematical analysis
Quantum dots
Vectors (mathematics)
Zinc sulfides
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Summary:The first photoactivated doped quantum dot vector for metal‐ion release has been developed. A facile method for doping copper(I) cations within ZnS quantum dot shells was achieved through the use of metal‐dithiocarbamates, with Cu+ ions elucidated by X‐ray photoelectron spectroscopy. Photoexcitation of the quantum dots has been shown to release Cu+ ions, which was employed as an effective catalyst for the Huisgen [3+2] cycloaddition reaction. The relationship between the extent of doping, catalytic activity, and the fluorescence quenching was also explored. Copper catalysis: Core–shell nanoparticles made of CdSeZnS quantum dots (QDs) with a copper‐doped shell have been prepared. Doping copper ions in the ZnS QD shell provides an alternate decay pathway for photoexcited CdSe affording a vector for the release of metal ions for catalysis.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201308778