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运用时间分辨表面增强拉曼光谱(TRSERS)结合电位双阶跃的方法,研究了硫脲衍生物甲基硫脲(MTU)和烯丙基硫脲(ATU)在银电极表面与ClO_4~-离子的共吸附行为,SERS强度-时间曲线表明它们各自相应的SERS谱峰强度随电位阶跃的响应速率不同,离电极表面较近的基团的特征谱峰强度的响应速率较快;MTU以S端且垂直吸附在电极表面,ATU也以S端和表面发生化学吸附,但整个分子斜躺吸附在电极表面上.
The effects of thiourea derivatives methylthiourea (MTU) and allylthiourea (ATU) on the surface of silver electrode coupled with ClO 4 - ions were studied by using time-resolved surface-enhanced Raman spectroscopy (TRSERS) The SERS intensity-time curves show that the corresponding SERS peaks have different response rates with potential steps, and the response rates of the characteristic peak intensities of the groups closer to the electrode surface are faster. The MTU is S End and vertical adsorption on the electrode surface, ATU also S-side and surface chemisorption, but the entire molecule is reclined on the electrode surface.