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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Colorimetric Dual Sensors of Metal Ions Based on 1,2,3-Triazole-4,5-Dicarboxylic Acid-Functionalized Gold Nanoparticles
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Colorimetric Dual Sensors of Metal Ions Based on 1,2,3-Triazole-4,5-Dicarboxylic Acid-Functionalized Gold Nanoparticles

机译：基于1,2,3-三唑-4,5-二羧酸官能化金纳米颗粒的金属离子的比色双传感器

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摘要

A simple, rapid, selective, and cost-effective colorimetric assay for Cr3+ and Eu3+ ion detection has been developed using functionalized gold nanoparticles. Gold nanoparticles (AuNPs) were prepared using HAuCl4, where sodium citrate is a reducing agent as well as a capping agent, and then functionalized with 1,2,3-triazole-4,5-dicarboxylic acid (TADA). Fourier transform infrared (FTIR) and Raman spectroscopies suggested that TADA was functionalized on the surface of AuNPs through the N atom of triazole. The TADA-functionalized gold nanoparticles (TADA@AuNPs) simultaneously detect Cr3+ and Eu3+ ions from aqueous solution and showed different responses to the two metal ions (Cr3+ and Eu3+) based on an aggregation-induced color change of AuNPs. They showed a color change from wine red to blue, which was easily detected by the naked eye, as well as by UV-visible and FTIR spectroscopies. The surface plasmon resonance absorbances of Cr3+ and Eu3+ are 633 and 671 nm, respectively, when Cr3+ and Eu3+ react with TADA@AuNPs and showed good linearity with Cr3+ and Eu3+ concentrations with detection limits 5.89 nM and 4.30 mu M, respectively (S/N = 3). The TADA@AuNPs showed excellent selectivity toward Cr" and Eu3+ compared to those of the 16 different metal ions. We had also tested the selectivity of TADA@AuNPs toward Eu3+ compared to that of the other 10 lanthanide systems. Optimal detection was achieved toward Cr3+ and Eu3+ ions in the pH range 4-10. In addition, TADA@AuNPs were applied to detect Cr3+ and Eu3+ ions from lake water showing low interference.
机译：使用官能化金纳米颗粒开发了用于Cr3 +和Eu3 +离子检测的简单，快速，选择性和经济高效的比色测定。金粒子（AuNPs）使用氯金酸，其中柠檬酸钠是还原剂以及封端剂制备，然后用1,2,3-三唑-4,5-二羧酸（TADA）官能化。傅里叶变换红外（FTIR）和拉曼光谱表明，TADA通过三唑的N原子在AUNPS表面上官能化。所述TADA官能金纳米颗粒（TADA @金纳米粒子）同时从水溶液检测Cr3 +的和Eu3 +的离子，并显示基于金纳米粒子的凝聚引起的颜色变化的两种金属离子（CR3 3+和Eu +）不同的响应。他们表现出从葡萄酒红色到蓝色的颜色变化，这很容易被肉眼和紫外线可见和FTIR光谱检测。 Cr3 +和Eu3 +的表面等离子体共振吸光度分别为633和671nm，当CR3 +和EU3 +与TADA @ AUNP反应，并分别显示良好的线性度，分别具有检测限值5.89nm和4.30μm的浓度为CR3 +和EU3 +浓度（S / N. = 3）。所述TADA @金纳米粒子表现出对铬优异的选择性”和Eu3 +的相比，这些16根不同的金属离子。我们还测试了TADA的选择性@的AuNP朝向Eu3 +的相比，在其他10个镧系元素的系统。最佳检测被朝向Cr3 +的实现在pH范围内4-10中的Eu3 +离子。此外，施加族@ AUNPS从湖水中检测CR3 +和EU3 +离子，显示出低干扰。

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