Alginate capped and manganese doped ZnS quantum dots as a phosphorescent probe for time-resolved detection of copper(II).
Mikrochim Acta
; 186(1): 41, 2018 12 19.
Article
em En
| MEDLINE
| ID: mdl-30569376
ABSTRACT
A method is described for the detection of Cu(II). It is based on the use of a room-temperature phosphorescent probe consisting of alginate-capped and manganese(II)-doped ZnS quantum dots. The carboxy groups at the surface of the probe strongly coordinate Cu(II) to form a complex. As a result, the 4T1-6A1 transition of the Mn(II) ions in the probe is quenched, and the long decay time (~2.1 ms in the unquenched state) is accordingly reduced. At excitation/emission wavelengths of 316/590 nm and a delay time of 0.1 ms, the probe shows a linear response in the 0.01 to 12 µM Cu(II) concentration range. The detection limit is 6.0 nM and the RSD is 3.2% (for n = 5). Graphical Abstract A two-step procedure is described to synthesize alginate capped manganese doped ZnS QDs. These coordinate with Cu(II) to form an absorbent complex and can be used as a phosphorescent probe for time-resolved detection of Cu(II).
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Base de dados:
MEDLINE
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article