Colorimetric detection of Al3+ ions using triazole–ether functionalized gold nanoparticles

A sensitive, selective colorimetric Al3+ detection method has been developed by using triazole–ether functionalized gold nanoparticles (TTP–AuNPs). Gold nanoparticles were prepared by reducing HAuCl4 with sodium borohydride in the presence of 5-(1,2-dithiolan-3-yl)-N-(prop-2-yn-1-yl)pentanamide (TP)...

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Bibliographic Details
Published in:Talanta (Oxford) 2013-12, Vol.117, p.70-74
Main Authors: Chen, Yu-Ching, Lee, I-Lin, Sung, Yi-Ming, Wu, Shu-Pao
Format: Article
Language:English
Subjects:
Acetylene
Agglomeration
Al3
aluminum
Aluminum - analysis
Borohydrides
cadmium
calcium
chromium
Click Chemistry
cobalt
Color
Colorimetric sensor
Colorimetry
Colorimetry - methods
copper
detection limit
ethanol
Ethers
Gold
Gold - chemistry
Gold nanoparticles
ions
iron
lead
Limit of Detection
magnesium
manganese
mercury
metal ions
Metal Nanoparticles - chemistry
nanogold
Nanoparticles
nickel
seawater
Seawater - chemistry
silver
Sodium
spectroscopy
Triazole
triazoles
Triazoles - chemistry
Water Pollutants, Chemical - analysis
zinc
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Summary:A sensitive, selective colorimetric Al3+ detection method has been developed by using triazole–ether functionalized gold nanoparticles (TTP–AuNPs). Gold nanoparticles were prepared by reducing HAuCl4 with sodium borohydride in the presence of 5-(1,2-dithiolan-3-yl)-N-(prop-2-yn-1-yl)pentanamide (TP). The azide part of 2-[2-(2-azidoethoxy)ethoxy]ethanol and the acetylene part of TP were combined to form a triazole structure through a click reaction. Aggregation of TTP–AuNPs was induced immediately in the presence of Al3+ ions, yielding a color change from red to blue. This Al3+-induced aggregation of TTP–AuNPs was monitored first with the naked eye and then UV–vis spectroscopy with a detection limit of 18.0nM. The TTP–AuNPs showed excellent selectivity for Al3+, compared to other metal ions (Ag+, Ca2+, Cd2+, Co2+, Cu2+, Cr3+, Fe2+, Fe3+, Hg2+, Mg2+, Mn2+, Ni2+, Pb2+, and Zn2+). In addition, TTP–AuNPs were used to detect Al3+ in sea water samples, with low interference. [Display omitted] •Sensitive and selective detection of Al3+ was demonstrated by using triazole–ether functionalized gold nanoparticles (TTP–AuNPs).•Aggregation of TTP–AuNPs was induced immediately in the presence of Al3+ ions, yielding a color change from red to blue.•The method showed good sensitivity (LOD=18.0nM) and selectivity.•TTP–AuNPs were used to detect Al3+ in sea water samples, with low interference.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2013.08.054