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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Gold Nanoparticle Triggered Chemiluminescence between Luminol and AgNO3
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Gold Nanoparticle Triggered Chemiluminescence between Luminol and AgNO3

机译：金纳米粒子引发鲁米诺与AgNO3之间的化学发光

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摘要

It was found that luminol could react with AgNO3 in the presence of gold colloid to generate chemiluminescence (CL) at 425 nm. UV—visible spectra and X-ray photoelectron spectra showed that AgNO3 was reduced by luminol to Ag in the CL reaction, which covered on the surface of gold nanoparticles to form Au/Ag core/ shell nanoparticles. The luminophor was identified by the CL spectrum as 3-aminophthalate. The effects of Au/Ag core/shell nanoparticles with various compositions on the luminol—AgNO3 system and the CL kinetics were also studied. On this basis, a CL reaction mechanism involving catalysis is proposed. When Au colloid was injected into the mixture of luminol and AgNO3, AgNO3 reacted rapidly with luminol under the catalysis of gold nanoparticles to produce Ag and luminol radicals, which reacted with the dissolved oxygen, accompanying a light emission; then, with instant deposition of Ag atoms on the surface of Au particles, the catalytic activity declined, leading to a sharp decrease in CL intensity and a slow growth of core/shell nanoparticles. The new CL system has the advantages of low background and good stability, and gold nanoparticles have excellent biocompatible property. It may find future applications in immunoassay and DNA detection.
机译：发现在金胶体存在下，鲁米诺可以与AgNO3反应，在425 nm处产生化学发光（CL）。紫外可见光谱和X射线光电子能谱表明，在CL反应中，鲁米诺将AgNO3还原为Ag，覆盖在金纳米颗粒的表面，形成Au / Ag核/壳纳米颗粒。该发光体通过CL光谱鉴定为3-氨基邻苯二甲酸酯。还研究了具有不同组成的Au / Ag核/壳纳米粒子对luminol-AgNO3系统和CL动力学的影响。在此基础上，提出了涉及催化作用的CL反应机理。当将金胶体注入鲁米诺与AgNO3的混合物中时，在金纳米粒子的催化下，AgNO3与鲁米诺迅速反应，生成Ag和鲁米诺自由基，它们与溶解的氧发生反应，并伴有发光。然后，由于Ag原子立即沉积在Au颗粒表面，催化活性下降，导致CL强度急剧下降，核/壳纳米颗粒生长缓慢。新的CL系统具有背景低，稳定性好的优点，并且金纳米颗粒具有出色的生物相容性。它可能会在免疫测定和DNA检测中找到未来的应用。

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