Document Type
Article
Publication Date
9-1-2020
Publication Title
Journal of Fluorescence
Volume
30
Issue
5
First Page
1181
Keywords
fluorescent detection, Graphene quantum dot, Hg 2+, SCN −
Last Page
1187
Abstract
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 Hg2+. Quenching was far less efficient with other similar heavy metals, Tl+, Pb2+ and Bi3+. 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. [Figure not available: see fulltext.].
DOI
10.1007/s10895-020-02586-z
ISSN
10530509
E-ISSN
15734994
Recommended Citation
Askari, Faezeh; Rahdar, Abbas; Dashti, Mohadeseh; and Trant, John F.. (2020). Detecting Mercury (II) and Thiocyanate Using “Turn-on” Fluorescence of Graphene Quantum Dots. Journal of Fluorescence, 30 (5), 1181-1187.
https://scholar.uwindsor.ca/chemistrybiochemistrypub/181
PubMed ID
32691262