Enhanced solid-state plasmon catalyzed oxidation and SERS signal in the presence of transition metal cations at the surface of gold nanostructures,Physical Chemistry Chemical Physics

当前位置： X-MOL 学术 › Phys. Chem. Chem. Phys. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Enhanced solid-state plasmon catalyzed oxidation and SERS signal in the presence of transition metal cations at the surface of gold nanostructures
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2021-08-26 , DOI: 10.1039/d1cp02931b
Srimanta Pal ₁ , Sujay Paul ₁ , Arun Chattopadhyay _{1,

2}

Affiliation

The effect of several metal cations (Mn²⁺, Co²⁺, Ni²⁺, Cu²⁺ and Zn²⁺) on the photochemical conversion of 4-aminothiophenol (4-ATP) into 4,4′-dimercaptoazobenzene (DMAB) is probed using surface enhanced Raman scattering (SERS). The coupling reaction is carried out on the surface of Au nanoparticles and Au nanorods using 532 nm and 632.8 nm laser excitations, respectively, in the absence and presence of metal cations. Here, we report that DMAB formation on the surface of Au nanostructures – when carried out in the solid state – is augmented significantly (by a factor of 1.98 to 4.07 and 3.34 to 5.74 for Au nanoparticle and Au nanorod substrates, respectively, and depending on the metal). Furthermore, the SERS signal is also markedly enhanced. Thus, the results underpin a new way of carrying out a photochemical reaction with a higher yield along with a higher SERS signal.

中文翻译：

在金纳米结构表面存在过渡金属阳离子的情况下，增强的固态等离子体催化氧化和 SERS 信号

几种金属阳离子（Mn ²⁺、Co ²⁺、Ni ²⁺、Cu ²⁺和Zn ^{2+ ）的影响}) 使用表面增强拉曼散射 (SERS) 探测 4-氨基苯硫酚 (4-ATP) 到 4,4'-二巯基偶氮苯 (DMAB) 的光化学转化。在金属阳离子不存在和存在的情况下，分别使用 532 nm 和 632.8 nm 激光激发在 Au 纳米粒子和 Au 纳米棒的表面上进行偶联反应。在这里，我们报告说，Au 纳米结构表面上的 DMAB 形成 - 当在固态下进行时 - 显着增加（Au 纳米颗粒和 Au 纳米棒基材分别增加了 1.98 到 4.07 和 3.34 到 5.74 倍，并且取决于金属）。此外，SERS 信号也显着增强。因此，该结果支持了一种以更高产率和更高 SERS 信号进行光化学反应的新方法。

更新日期：2021-09-22

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11