Detecting Mercury (II) and Thiocyanate Using “Turn-on” Fluorescence of Graphene Quantum Dots
In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg 2+ . Quenching was far less efficient with other similar heavy...
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Published in | Journal of fluorescence Vol. 30; no. 5; pp. 1181 - 1187 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.09.2020
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg
2+
. Quenching was far less efficient with other similar heavy metals, Tl
+
, Pb
2+
and Bi
3+
. Fluorescence could be near quantitatively restored through the introduction of thiocyanate. This “turn-on” fluorescence can thus be used to detect both or either environmental and physiological contaminants mercury and thiocyanate and could prove useful for the development of simple point-of-care diagnostics in the future.
Graphical Abstract |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1053-0509 1573-4994 |
DOI: | 10.1007/s10895-020-02586-z |