十二烷基硫酸钠溶液的荧光光谱特性研究  

Study on the Fluorescence Spectra of the Solution of the Lauryl Sodium Sulfate

作　　者：朱亚波[1] 仲坤[2] 强颖怀[1] 刘莹[2] 蔡存金[2] 

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116 [2]徐州师范大学物理系,江苏徐州221116

出　　处：《中国矿业大学学报》2006年第6期799-802,共4页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(60376032);中国矿业大学科技基金项目(ON060164)

摘　　要：十二烷基硫酸钠(SDS)是一种重要的荧光增敏剂,为了弄清SDS溶液的荧光特征并探讨其荧光产生机制,利用稳态荧光光谱仪分析了配置的多组样品,结果发现:低浓度时SDS溶液仅有1个荧光峰,位于300 nm附近,当达到临界胶团浓度时,在330 nm处出现第2个峰．300 nm处的第1荧光峰由SDS单分子亲水基-OH中氧原子受激产生;330 nm处的第2荧光峰则由胶团表面-OH中氧原子受激产生．配位物的不同使-OH的n电子受激后跃迁至不同的能级从而导致发射荧光波长的变化.The lauryl sodium sulfate （SDS） can be used to reinforce the fluorescence. The fluorescence spectra of the SDS solution and its emitting mechanism were investigated using a steady state fluorescence spectrometer to analyze prepared SDS samples. The results show that only one fluorescence peak near 300 nm is observed while samples with low concentration, and the second peak appears at 330 nm while samples with the critical micelle concentration. The 300 nm fluorescence peak derives from the oxygen in -OH attaching to single SDS molecule, the oxygen in --OH absorbed on the surface of SDS micelle generates the peak at 330 nm. As being inspirited, the n electron of --OH in different coordination compounds will leap to differ- ent energy levels which lead --OH group emit different wavelength fluorescence.

关 键 词：十二烷基硫酸钠 临界胶团浓度 激发光 荧光光谱 

分 类 号：O433.2[机械工程—光学工程]