菜粉蝶颗粒体病毒分子与银表面间相互作用的SERS谱研究

A STUDY ON THE INTERACTION OF MOLECULES OF CABBAGEBATTERFLY PrGV WITH SILVER SURFACE BY SERS SPECTROSCOPY

通过对菜粉蝶颗粒体病毒病毒粒子 (样品 )的表面增强拉曼散射 (SERS)光谱的分析 ,得出样品分子在SERS中与银表面相互作用的一些特征。样品分子主要通过羧基和氨基与银表面键联。相应谱带的拉曼增强效果与分子基团处于银表面的几何状态有关。分子与银表面产生化学吸附。芳香族氨基酸侧链的π -电子复合物和分子基团的σ -复合物的存在 ,使增强具有短程特性 ,其增强机制主要为分子增强。

The Surface-enhanced Raman Scattering (SERS) Spectrum of Cabbage Butterfly PrGV(sample) adsorbed on silver surface was obtained and analysed. The samplemolecules were adsorbed on the silver surface by the carboxylate groups and the amino groups which is chemical in nature. The enhancement is related to the geometric modes of adsorbed groups on silver surface. The mechanism of enhancement has a short-range character and it is attributed to an action of the π-electron complexes of side-chains of the aromatic amino acids and σ-complexes of the molecular groups. The main enhancement is molecular mechanism.