维生素PP的表面增强拉曼散射光谱研究  

Study of Vitamin PP by Surface Enhanced Raman Scattering Spectrum

作　　者：常大虎[1] 王波[2] 张振龙[2] 莫育俊[2] 

机构地区：[1]洛阳理工学院数理部,河南洛阳471023 [2]河南大学物理与电子学院光学与光电子技术研究所

出　　处：《分析测试学报》2008年第8期804-806,811,共4页Journal of Instrumental Analysis

基　　金：国家自然科学基金资助项目(10274019,10674041)

摘　　要：报道了维生素PP分子的常规拉曼光谱(NRS)及该分子在活性衬底银胶上的表面增强拉曼散射(SERS),并对它的拉曼特征峰进行了初步的指认和归属。维生素PP的常规拉曼光谱和SERS谱的对比表明,该分子吸附在银表面时,它的C=O键与银粒子发生电荷转移,碳氧双键打开形成C—O单键。通过分析可以推断维生素PP通过羰基和氨基垂直或斜立吸附在银表面上。The normal Raman spectrum （NRS） and the surface enhanced Raman scattering （SERS） spectrum of vitamin PP（VPP） in silver sol as well as the assignments of their characteristic Raman bands were presented. By comparing the spectra of NRS and SERS, it was found that most of the characteristic bands of NRS in terms of intensity and location changed significantly. For example, a characteristic band of NRS at 1 677 cm^-1, assigned as the carbonyl group C = O, disappeared, but a new band at 1 292 cm^-1, assigned as the C-O group, turned up in the SERS spectrum. This can be attributed to the charge transfer reaction occurred between the C = O group of VPP molecule and the silver sol on the surface. The results also showed that the pyridine ring was far from the silver surface and the amino and the carbonyl groups were close to it, indicating that the VPP molecule adsorbed perpendicularly or obliquely onto the silver sol surface via the C-O and amino groups.

关 键 词：维生素PP 表面增强拉曼散射(SERS) 拉曼光谱 银胶 

分 类 号：O657.37[理学—分析化学] Q56[理学—化学]