Highly selective and sensitive gold nanoparticle-based colorimetric assay for PO43- in aqueous solution

Guangke He; Liang Zhao; Kai Chen; Yuanyuan Liu; Hongjun Zhu

doi:10.1016/j.talanta.2012.11.064

Highly selective and sensitive gold nanoparticle-based colorimetric assay for PO₄^3- in aqueous solution

Guangke He, Liang Zhao, Kai Chen, Yuanyuan Liu, Hongjun Zhu

School of Chemistry and Moleculai Engineering

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

A rapid, simple and real-time colorimetric assay for detecting phosphate anions (PO₄^3-) in aqueous solution was developed. The method was based on a novel functionalized gold nanoparticles (MPTP-Zn-AuNPs), which was synthesized by the ligand-exchange reaction of 4′-(4- mercaptophenyl)-2,2′:6′,2″-terpyridine zinc(II) complex (MPTP-Zn) with citrate-stabilized aqueous AuNPs. The strong coordination between MPTP-Zn-AuNPs and PO₄^3- anion gave rise to a color change from wine-red to blue-gray that was discernible by the naked eye and an easily measurable alteration in the absorption spectrum of the particles in aqueous solution. And the new technique exhibited the high selectivity for PO ₄^3- over 11 other anions and could be used to determine PO₄^3- with a detection limit of 11 ppm.

Original language	English
Pages (from-to)	73-78
Number of pages	6
Journal	Talanta
Volume	106
DOIs	https://doi.org/10.1016/j.talanta.2012.11.064
State	Published - 2013

Keywords

Aqueous solution
Colorimetric assay
Gold nanoparticles
Phosphate anion detection

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10.1016/j.talanta.2012.11.064

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title = "Highly selective and sensitive gold nanoparticle-based colorimetric assay for PO43- in aqueous solution",

abstract = "A rapid, simple and real-time colorimetric assay for detecting phosphate anions (PO43-) in aqueous solution was developed. The method was based on a novel functionalized gold nanoparticles (MPTP-Zn-AuNPs), which was synthesized by the ligand-exchange reaction of 4′-(4- mercaptophenyl)-2,2′:6′,2″-terpyridine zinc(II) complex (MPTP-Zn) with citrate-stabilized aqueous AuNPs. The strong coordination between MPTP-Zn-AuNPs and PO43- anion gave rise to a color change from wine-red to blue-gray that was discernible by the naked eye and an easily measurable alteration in the absorption spectrum of the particles in aqueous solution. And the new technique exhibited the high selectivity for PO 43- over 11 other anions and could be used to determine PO43- with a detection limit of 11 ppm.",

keywords = "Aqueous solution, Colorimetric assay, Gold nanoparticles, Phosphate anion detection",

author = "Guangke He and Liang Zhao and Kai Chen and Yuanyuan Liu and Hongjun Zhu",

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T1 - Highly selective and sensitive gold nanoparticle-based colorimetric assay for PO43- in aqueous solution

AU - He, Guangke

AU - Zhao, Liang

AU - Chen, Kai

AU - Liu, Yuanyuan

AU - Zhu, Hongjun

PY - 2013

Y1 - 2013

N2 - A rapid, simple and real-time colorimetric assay for detecting phosphate anions (PO43-) in aqueous solution was developed. The method was based on a novel functionalized gold nanoparticles (MPTP-Zn-AuNPs), which was synthesized by the ligand-exchange reaction of 4′-(4- mercaptophenyl)-2,2′:6′,2″-terpyridine zinc(II) complex (MPTP-Zn) with citrate-stabilized aqueous AuNPs. The strong coordination between MPTP-Zn-AuNPs and PO43- anion gave rise to a color change from wine-red to blue-gray that was discernible by the naked eye and an easily measurable alteration in the absorption spectrum of the particles in aqueous solution. And the new technique exhibited the high selectivity for PO 43- over 11 other anions and could be used to determine PO43- with a detection limit of 11 ppm.

AB - A rapid, simple and real-time colorimetric assay for detecting phosphate anions (PO43-) in aqueous solution was developed. The method was based on a novel functionalized gold nanoparticles (MPTP-Zn-AuNPs), which was synthesized by the ligand-exchange reaction of 4′-(4- mercaptophenyl)-2,2′:6′,2″-terpyridine zinc(II) complex (MPTP-Zn) with citrate-stabilized aqueous AuNPs. The strong coordination between MPTP-Zn-AuNPs and PO43- anion gave rise to a color change from wine-red to blue-gray that was discernible by the naked eye and an easily measurable alteration in the absorption spectrum of the particles in aqueous solution. And the new technique exhibited the high selectivity for PO 43- over 11 other anions and could be used to determine PO43- with a detection limit of 11 ppm.

KW - Aqueous solution

KW - Colorimetric assay

KW - Gold nanoparticles

KW - Phosphate anion detection

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DO - 10.1016/j.talanta.2012.11.064

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SN - 0039-9140

VL - 106

SP - 73

EP - 78

JO - Talanta

JF - Talanta

ER -

Highly selective and sensitive gold nanoparticle-based colorimetric assay for PO₄^3- in aqueous solution

Abstract

Keywords

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