Triazole-ester modified silver nanoparticles: click synthesis and Cd2+ colorimetric sensing

Li, Haibing; Yao, Yao; Han, Cuiping; Zhan, Junyan

doi:10.1039/b908761c

Cited by 93 publications

(62 citation statements)

References 34 publications

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“…The detection limit of this sensor system is as low as 5 μM, which is much lower than that of the reported methods based on silver nanoparticles. 18 These results indicate that the detection system has potential applications in the detection of Cd 2+ in practical samples. Moreover, we also investigated the sensitivity of the detection system at different pH values (from 4 to 9).…”

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confidence: 77%

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Label-Free Colorimetric Detection of Cadmium Ions in Rice Samples Using Gold Nanoparticles

et al. 2014

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A simple and label-free colorimetric method for cadmium ions (Cd 2+ ) detection using unmodified gold nanoparticles (AuNPs) is reported. The unmodified AuNPs easily aggregate in a high concentration of NaCl solution, but the presence of glutathione (GSH) can prevent the saltinduced aggregation of AuNPs. When Cd 2+ is added to the stable mixture of AuNPs, GSH, and NaCl, Cd 2+ can coordinate with 4× GSH as a spherical shaped complex, which decreases the amount of free GSH on the surface of gold nanoparticles to weaken the stability of AuNPs, and AuNPs will easily aggregate in high-salt conditions. On the basis of the mechanism, we design a simple, label-free colorimetric method using AuNPs accompanied by GSH in a high-salt environment to detect Cd 2+ in water and digested rice samples.A s an important natural element, cadmium is widely used in many fields, such as industry, agriculture, and so on. 1 However, chronic exposure of Cd 2+ has caused many serious environmental and health problems, including renal dysfunction, reduced lung capacity, and some cancers. 2,3 In 2013, the government test indicated that some rice samples in South China were contaminated with cadmium. In China, the maximum permitted concentration for cadmium in rice has been set at a level of 0.2 mg/kg, 4 which is lower than the standard of Codex Alimentarius Commission (CAC), but these events are people alarming. Thus, sensitive sensing cadmium in rice is of considerable significance for food safety and human health. Though many methods for Cd 2+ detection have been developed, these methods either are time-consuming or require costly instruments and complicated operation. 5−9 To satisfy the requirement of an on-site and quick testing, a facile, simple, and on-site method for monitoring Cd 2+ is, therefore, still required.Nowadays, many colorimetric detection methods based on gold nanoparticles (AuNPs) or silver nanoparticles have been well developed because these nanoparticles have extremely high extinction coefficients and strong distance-dependent optical properties. 10−17 However, there are very few colorimetric methods for Cd 2+ detection, and the selectivity and sensitivity of those detection methods of Cd 2+ is not sufficiently good for real-world applications. 18−23 For example, a colorimetric method for Cd 2+ detection is developed with triazole-ester modified silver nanoparticles. This method suffers from complex organic synthesis, long response time, and poor sensitivity. 18 AuNPs cofunctionalized with 6-mercaptonicotinic acid and L-cysteine can sense Cd 2+ with a visible color change. However, Pb 2+ and Cu 2+ show interference with the detection of Cd 2+ . 19 A new test paper for the colorimetric immunosensing Cd 2+ has been constructed by using the Cd 2+ -ethylenediaminetetraacetic acid-bovine serum albumin-AuNPs conjugate. The test paper can be successfully used to detect Cd 2+ in drinking and tap water with almost 100% accuracy. However, the practical application is not included in this paper. 22 A new colorimetric met...

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confidence: 77%

“…This method suffers from complex organic synthesis, long response time, and poor sensitivity. 18 AuNPs cofunctionalized with 6-mercaptonicotinic acid and L-cysteine can sense Cd 2+ with a visible color change. However, Pb 2+ and Cu 2+ show interference with the detection of Cd 2+ .…”

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confidence: 99%

Label-Free Colorimetric Detection of Cadmium Ions in Rice Samples Using Gold Nanoparticles

et al. 2014

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“…However, limited reports have been demonstrated the use of organic framework on Au and Ag NPs for the selective and sensitive detection of Cd 2+ ion in various environmental and biological samples. For example, Zhan et al developed miniaturized colorimetric method for the detection of Cd 2+ ion in complex samples using triazole-ester modified Ag NPs as a colorimetric probe [23]. Xue et al functionalized Au NPs with 6-mercaptonicotinic acid and l-cysteine and used as a colorimetric probe for the detection of Cd 2+ ion in lake water samples [24].…”

Section: Introductionmentioning

confidence: 99%

Simple and sensitive colorimetric sensing of Cd2+ ion using chitosan dithiocarbamate functionalized gold nanoparticles as a probe

Mehta

Basu

Singhal

et al. 2015

Sensors and Actuators B: Chemical

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“…Applications can span from process control to environmental monitoring, food analysis and medical diagnosis. Chemosensors based on fluorescence offer many advantages over other types of sensors in terms of sensitivity, response time and cost, and they are of crucial importance for the development of methods for the detection and quantification of metal ions such as zinc [16,17], cadmium [18,19], lead [20,21], mercury [22,23] and tin [24].…”

Section: Introductionmentioning

confidence: 99%

Luminescent organotin complexes with the ligand benzil bis(benzoylhydrazone)

López‐Torres

Medina-Castillo

Mendiola

2010

Journal of Organometallic Chemistry

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Triazole-ester modified silver nanoparticles: click synthesis and Cd2+ colorimetric sensing

Abstract: Triazole-ester modified silver nanoparticles were designed and synthesized through click chemistry, which provided a highly selective colorimetric sensor for Cd2+.

Cited by 93 publications

References 34 publications

Label-Free Colorimetric Detection of Cadmium Ions in Rice Samples Using Gold Nanoparticles

Label-Free Colorimetric Detection of Cadmium Ions in Rice Samples Using Gold Nanoparticles

Simple and sensitive colorimetric sensing of Cd2+ ion using chitosan dithiocarbamate functionalized gold nanoparticles as a probe

Luminescent organotin complexes with the ligand benzil bis(benzoylhydrazone)

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