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

被引:21
作者
Vilar-Vidal, N. [1 ,2 ]
Rivas, J. [1 ,2 ]
Lopez-Quintela, M. A. [1 ]
机构
[1] Univ Santiago de Compostela, Res Technol Inst, Nanomag Lab, E-15782 Santiago De Compostela, Spain
[2] INL Int Iberian Nanotechnol Lab, P-4715310 Braga, Portugal
关键词
SILVER NANOCLUSTERS; GOLD NANOPARTICLES; METAL-IONS; SENSITIVE DETECTION; STRATEGY; CU2+; DOTS; HG2+;
D O I
10.1039/c4cp02148g
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:26427 / 26430
页数:4
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