高氯酸盐与十六烷基三甲基溴化铵作用的光散射  

Interaction of Perchlorate and Cetyltrimethylammonium Bromide Investigated by Light Scattering Technique

作　　者：许佳丽[1] 李原芳[1] 

机构地区：[1]发光与实时分析教育部重点实验室,西南大学化学化工学院,重庆400715

出　　处：《应用化学》2010年第8期935-938,共4页Chinese Journal of Applied Chemistry

基　　金：重庆市科委自然科学基金计划(CSTC;2008BB0248)资助项目

摘　　要：利用光散射光谱法研究了高氯酸根和阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)的作用。在酸性条件下,高氯酸根和CTAB通过静电作用形成离子缔合物,导致体系光散射强度增强。环境水样中的常见阴离子如Cl-、Br-、ClO3-、NO3-和PO34-等与CTAB单独作用时其光散射强度很弱,而当它们与高氯酸根同时存在时,由于协同作用使体系散射强度发生改变。以Cl-为例,借助动态光散射测定,初步探讨了体系协同作用的机理。Light scattering（LS） technique was employed to investigate the interaction between perchlorate and cationic surfactant cetyltrimethylammonium bromide（CTAB）. It was found that perchlorate could combine with CTAB in an acidic medium to form ionic associated compounds due to the electrostatic attraction,resulting in enhanced LS signals. It should be noted that anions such as Cl - ,Br^- ,ClO 3^- ,NO 3^- and PO4^3 -can only induce weak LS signals when interacting with CTAB alone,but significant changes of LS signals can be observed once these anions coexist with perchlorate,indicating that coordinating effects exist. In order to discuss the coordination mechanism,dynamic light scattering（DLS） measurements were further made with chlorate（Cl^ - ） as an example.

关 键 词：高氯酸根 十六烷基三甲基溴化铵 光散射 动态光散射 

分 类 号：O661[理学—分析化学] O652[理学—化学]