基于Au-Ag合金的EC-SERS光谱监测多巴胺氧化还原反应OA
Probing Dopamine Redox Reactions Based on Au-Ag Alloys and EC-SERS
采用一锅法即柠檬酸盐还原法合成了大小形貌均匀的Au-Ag纳米颗粒,接着利用咖啡环效应,在ITO玻璃表面固定 Au-Ag 纳米颗粒,制备出了具有表面增强拉曼散射(SERS)响应的活性基底,该基底表现出优异的SERS重现性与均一性.将其作为EC-SERS的工作电极,通过电化学和SERS相结合的方法来检测Au-Ag表面多巴胺(苯酚)和多巴胺(苯醌)的光谱性质,发现可采用H2O2 和GSH调制其在 1270、1335 和 1455 cm-1 处的SERS光谱强度.最后通过恒电位法探究了多巴胺(DA)在电极上氧化还原的电位依赖性变化,为研究其氧化还原性质提供了新的依据.
The citrate reduction method was used to synthesize Au-Ag nanoparticles of uniform size and shape,followed by the preparation of active substrates with surface-enhanced Raman scattering(SERS)response by immobilizing Au-Ag nanoparticles on ITO glass surfaces using the coffee ring effect.Using it as a working electrode for EC-SERS,we examined the spectral properties of dopamine(phenol)and dopamine(benzoquinone)on the Au-Ag surface by a combined electrochemical and SERS methods and found that H2O2 and GSH could be used to modulate their SERS spectral intensities at 1270,1335 and 1455 cm-1.Finally,the potential-dependent changes in the redox of dopamine(DA)at the electrode were investigated by the constant potential method,providing a new basis for the study of its redox properties.
王康;刘官;张磊
南京邮电大学,江苏 南京 210000
化学
电化学-表面增强拉曼散射多巴胺氧化还原表面增强拉曼散射
electrochemical surface-enhanced raman scatteringdopamineredoxsurface-enhanced raman scattering
《广州化学》 2024 (001)
33-37 / 5
江苏省自然科学基金面上项目(BK20211271)
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