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通过表面增强拉曼散射研究了胞嘧啶、胸腺嘧啶和尿嘧啶在粗糙银电极表面上的吸附形态随电极电位的变化关系。大量的结构信息可从丰富的表面拉曼信号及其随电极电位相应的变化而获得。分析表明在电极电位负移过程中,胞嘧啶一直通过N 3位垂直吸附于纳米银颗粒表面;而胸腺嘧啶分子和尿嘧啶分子在表面的吸附状态都随电位改变发生了变化,较正电位下,胸腺嘧啶分子基本上以环平行于银电极表面吸附,而尿嘧啶分子通过N 3和C 2O 7团簇垂直吸附在银电极表面,较负电位下,胸腺嘧啶分子以N 1—C 2O 7半簇垂直于电极表面吸附,而尿嘧啶分子以O 7垂直吸附在银电极表面。
The surface-enhanced Raman scattering of cytosine, thymine and uracil on the coarse silver electrode adsorption morphology with the electrode potential changes. A great deal of structural information can be obtained from abundant surface Raman signals and their corresponding changes with the electrode potential. The results showed that during the negative shift of the electrode potential, cytosine was adsorbed vertically on the surface of nano silver particles through the N 3 position. The adsorption of thymine and uracil on the surface changed with the change of potential. , The thymine molecule adsorbed on the surface of the silver electrode basically in a ring-parallel manner, and the uracil molecule adsorbed vertically on the surface of the silver electrode through the N 3 and C 2 O 7 clusters. At the negative potential, the thymine molecule was adsorbed on the N 1 -C 2 O 7 Half of the clusters are adsorbed perpendicularly to the surface of the electrode, while uracil molecules are adsorbed vertically on the surface of the silver electrode with O 7.