Copper clusters as novel fluorescent probes for the detection and photocatalytic elimination of lead ions

A new homogeneous assay for a fast, selective and sensitive detection and elimination of lead ions has been developed using copper clusters as novel fluorescent probes in aqueous solutions. At the same time, their elimination is achieved using the efficient photocatalytic activity of such clusters....

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2014-12, Vol.16 (48), p.26427-26430
Main Authors: Vilar-Vidal, N, Rivas, J, López-Quintela, M A
Format: Article
Language:English
Subjects:
Aqueous solutions
Cations
Clusters
Copper
Luminescence
Metal clusters
Photocatalysis
Physical chemistry
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Summary:A new homogeneous assay for a fast, selective and sensitive detection and elimination of lead ions has been developed using copper clusters as novel fluorescent probes in aqueous solutions. At the same time, their elimination is achieved using the efficient photocatalytic activity of such clusters. Both effects are explained in terms of an efficient electron transfer due to the LUMO energy of the cluster overlapping with the ion redox potential. The mechanism, which allows the explanation of previously reported results for different types of metal clusters, is further confirmed using smaller and larger Cu clusters displaying non-selective and non-quenching luminescence in the presence of different cations.
ISSN:1463-9076
1463-9084
DOI:10.1039/c4cp02148g