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首页> 外文期刊>RSC Advances >Surface-plasmon-induced azo coupling reaction between nitro compounds on dendritic silver monitored by surface-enhanced Raman spectroscopy
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Surface-plasmon-induced azo coupling reaction between nitro compounds on dendritic silver monitored by surface-enhanced Raman spectroscopy

机译：表面增强拉曼光谱监测树枝状银上硝基化合物之间的表面等离子体激元偶氮偶合反应

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摘要

Silver dendrites (Ag-Ds) were prepared by electrodeposition on a glassy carbon electrode (GCE) from a silver(I) sulfate solution containing cysteine. The dendritic Ag surface showed high Raman enhancement, enabling the detection of analytes from dilute solution by surface-enhanced Raman scattering (SERS). 4-Nitrothiophenol (4-NTP) was used as the probe molecule to examine the analyte-concentrating ability and SERS activity of Ag-Ds/GCE composite. The results indicate that the Ag-Ds/GCE composite exhibits a prominent SERS effect. The lowest 4-NTP detection limit obtained was 5.0 × 10?9 M. We used a 4-NTP-functionalized Ag-Ds as an analytic and catalytic platform for chemical reactions involving the conversion of 4-NTP to p-p′-dimercaptoazobenzene and azo coupling of 4-nitrobenzo-15-crown-5 to 4,4′-mercaptoazobenzene-15-crown-5-ether.
机译：通过在玻璃碳电极（GCE）上用含半胱氨酸的硫酸银（ I ）溶液电沉积制备树突状银（Ag-Ds）。树突状的Ag表面显示出高的拉曼增强，从而能够通过表面增强的拉曼散射（SERS）从稀溶液中检测分析物。以4-硝基硫酚（4-NTP）为探针分子，研究了Ag-Ds / GCE复合材料的分析物富集能力和SERS活性。结果表明，Ag-Ds / GCE复合材料表现出显着的SERS效应。获得的最低4-NTP检测限为5.0×10 ？9 M。我们使用4-NTP功能化的Ag-Ds作为化学反应的分析和催化平台涉及4-NTP到 pp '-二巯基偶氮苯的转化和4-硝基苯并-15-冠-5到4,4'-巯基偶氮苯-15-冠-5-醚的偶氮偶联。

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