吡啶－碘电子转移复合物的表面增强拉曼光谱（SERS）研究

The Surface Enhanced Raman Study of The charge Transfer Complex of Pyridine－Iodine on The Silver Electrode

吡啶－碘电子转移复合物的表面增强拉曼光谱（ＳＥＲＳ）研究马树国，吴国祯（清华大学物理系北京１０００８４）ＴｈｅＳｕｒｆａｃｅＥｎｈａｎｃｅｄＲａｍａｎＳｔｕｄｙｏｆＴｈｅｃｈａｒｇｅＴｒａｎｓｆｅｒＣｏｍｐｌｅｘｏｆＰｙｒｉｄｉｎｅ－Ｉｏｄｉｎｅｏｎ...

Abstract The sutface enhanced Raman spectra （SERS） of the charge transfer complex of pyridline-iodine on the Ag electrode were identified．As compared with the well known SERS of pyridine， the u_1，uuand U_2 modes are blue shift- ed． This is also confirmed from the comparison of the infrared absorption spec-tra of pyriding-iodine crystalline complex and pyridine. The origin of the blue shift and other characteristics of the SERS spectra of the complex are dis-cussed． The attempt to observe the SERS spectra of the iodine moietv of the complex was unsuccessful．This is attributed to the short range effect of the charge transfer mechanism of SERS.