双硫腙在银溶胶中的表面增强拉曼光谱(SERS)研究  

SERS Study on the Interaction of Dithizone with Silver Substrates

作　　者：刘小龙[1] 王旭[1] 徐蔚青[1] 赵冰[1] 

机构地区：[1]吉林大学超分子结构与材料教育部重点实验室,长春130023

出　　处：《光散射学报》2004年第2期122-126,共5页The Journal of Light Scattering

基　　金：国家自然科学基金资助项目(批准号:20273022;20173019;20375014)

摘　　要：利用SERS技术能显著提高拉曼信号的优点,以银溶胶为基底,研究了双硫腙与溶胶中银的相互作用方式。首先我们通过双硫腙氯仿溶液的紫外光谱研究,认为在氯仿溶液中双硫腙在较低的浓度下(<10-5mol/L)是以单体的形式存在。通过对双硫腙单体在银溶胶中的表面增强拉曼光谱的研究,我们认为双硫腙是通过S,N与银基底作用,并且在很低的浓度下(10-7mol/L)有很好的拉曼信号。From the UV-vis spectra of dithizone, we learn that dithizone is affected by concentration dependencies and solvatochromism that move UV-vis spectra of dithizone to lower wavelength. Dithizone is believed a free molecular below 10^(-5)mol/L. SERS, a Raman spectrum whose intensity exceeds by a factor of 10~4-10~6 than its normal spectrum is observed, is a good means to detect Dithizone. Using silver colloids as substrates, We investigate the interaction of dithizone with silver substrates and give our own explain: we learn that dithizone bonds silver through S and N.

关 键 词：表面增强拉曼光谱 双硫腙 紫外光谱 

分 类 号：O657.37[理学—分析化学]