NDLI: Probing phosphate ion via the europium(III)-modulated fluorescence of gold nanoclusters

Content Provider	Springer Nature Link
Author	Ding, Shou Nian Li, Chun Mei Gao, Bu Hong Kargbo, Osman Wan, Neng Chen, Xi Zhou, Chan
Copyright Year	2014
Abstract	Fluorescent gold nanoclusters (Au-NCs) were synthesized by a one-pot method using 11-mercaptoundecanoic acid as a reducing and capping reagent. It is found that the red fluorescence of the Au-NCs is quenched by the introduction of Eu(III) at pH 7.0, but that fluorescence is restored on addition of phosphate. The Au-NCs were investigated by transmission electron microscopy and fluorescence photographs. The effect of pH on fluorescence was studied in the range from pH 6 to 10 and is found to be strong. Based on these findings, we have developed an assay for phosphate. Ions such as citrate, Fe(CN)6 3−, SO4 2−, S2O8 2−, Cl−, HS−, Br−, AcO−, NO2 −, SCN−, ClO4 −, HCO3 −, NO3 −, Cd2+, Ba2+, Zn2+, Mg2+, and glutamate do not interfere, but ascorbate and Fe3+ can quench Au-NCs fluorescence. The fluorescent nanocluster probe responds to phosphate in the range from 0.18 to 250 μM, and the detection limit is 180 nM. The probe also responds to pyrophosphate and ATP. Figure Off/on fluorescence sensor for phosphate based on Eu3+-modulated Au NCs thanks to the competition of oxygen-donor atoms from phosphate with those from the carboxylate groups was developed
Starting Page	1957
Ending Page	1963
Page Count	7
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	181
Issue Number	15-16
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2014-05-31
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fluorescence Au nanoclusters Eu3+ Phosphate Nanochemistry Nanotechnology Characterization and Evaluation of Materials Analytical Chemistry Microengineering
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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