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首页> 外文期刊>RSC Advances >Reversible coupling of 4-nitroaniline molecules to 4-aminothiophenol functionalized on Ag nanoparticle/graphene oxide nanocomposites through the plasmon assisted chemical reaction
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Reversible coupling of 4-nitroaniline molecules to 4-aminothiophenol functionalized on Ag nanoparticle/graphene oxide nanocomposites through the plasmon assisted chemical reaction

机译：通过等离子体辅助化学反应在Ag纳米粒子/石墨烯氧化物纳米复合材料上官能化4-硝基苯胺分子至4-氨噻吩酚的可逆偶联

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摘要

In this study, we demonstrate the formation of azo compounds on a composite of silver nanoparticles and graphene oxides (Ag@G) through a plasmon-assisted coupling reaction between different amine compounds. According to the time-dependent SERS experiments, 4-aminothiophenol (4ATP) molecules on Ag@G can be associated with external reactants such as 4-nitroaniline to form azo compounds when aided by the plasmons. Furthermore, the rate of the coupling reaction is dependent on the wavelength and the power of the excitation laser. It is noteworthy that the coupling reaction can only occur between two compounds containing amino groups in the presence of Ag nanoparticles. On the other hand, the N=N double bond in the azo compound can be dissociated in a NaBH4 solution after 532 nm laser irradiation. The reduction of the azo compound results in the recovery of 4ATP molecules on Ag@G. Finally, we demonstrate that the plasmon-assisted coupling reaction allows for the immobilization of amine-terminated DNAs on 4ATP modified Ag@G. This DNA modified Ag@G can serve as the SERS substrate to sensitively detect its complementary DNA.
机译：在该研究中，我们通过不同胺化合物之间的等离子体辅助偶联反应来证明在银纳米粒子和石墨烯和石墨烯（Ag @ G）的复合物上形成偶氮化合物。根据时间依赖的SERS实验，AG @ G上的4-氨基噻吩醇（4ATP）分子可以与外部反应物如4-硝基苯胺相关联，以在由等离子体辅助时形成偶氮化合物。此外，偶联反应的速率取决于激光激光的波长和功率。值得注意的是，偶联反应只能在Ag纳米颗粒存在下含有氨基的两种化合物之间发生。另一方面，在532nm激光照射后可以在NaBH 4溶液中解离偶氮化合物中的N = N双键。偶氮化合物的还原导致在Ag @ g上的4ATP分子的回收率。最后，我们证明了等离子体辅助偶联反应允许在4ARP改性Ag @ G上固定胺封端的DNA。该DNA改性Ag @ G可以用作SERS衬底以敏感地检测其互补DNA。

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  • 来源
    《RSC Advances》 |2016年第35期|共7页
  • 作者

    Tasi Ting-Ti; Lin Tsung-Wu; Shao Li-Dong; Shen Hsin-Hui;

  • 作者单位

    Tunghai Univ Dept Chem 181 Sec 3 Taichung Port Rd Taichung 40704 Taiwan;

    Tunghai Univ Dept Chem 181 Sec 3 Taichung Port Rd Taichung 40704 Taiwan;

    Shanghai Univ Elect Power Shanghai Key Lab Mat Protect &

    Adv Mat Elect Powe 2013 Ping Liang Rd Shanghai 200090 Peoples R China;

    Monash Univ Biomed Discovery Inst Infect &

    Immun Program Melbourne Vic 3800 Australia;

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  • 正文语种 eng
  • 中图分类 化学;
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