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Orientation Angle of Molecules at Hexadecane-Water Interface Studied with Total Internal Reflection Second Harmonic Generation
Li-bo Zhang,Hui Fang,Shun-li Chen,Xue-feng Zhu,Wei Gan
Author NameAffiliationE-mail
Li-bo Zhang Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China;University of Chinese Academy of Sciences, Beijing 100049, China  
Hui Fang Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China;University of Chinese Academy of Sciences, Beijing 100049, China  
Shun-li Chen Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China  
Xue-feng Zhu Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China  
Wei Gan Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China ganwei@ms.xjb.ac.cn 
Abstract:
The orientation angle is an important parameter that reflects the structure of molecules at interfaces. In order to obtain this parameter, second order nonlinear spectroscopic techniques including second harmonic generation (SHG) and sum frequency generation-vibrational spectroscopy (SFG-VS) have been successfully applied through analysis of the nonlinear signal from various polarizations. In some SHG and SFG-VS experiments, total internal reflection (TIR) configuration has been adopted to get enhanced signals. However, the reports on the detailed procedure of the polarization analysis and the calculation of the orientation angle of interfacial molecules under TIR configuration are still very few. In this paper, we measured the orientation angles of two molecules at the hexadecane-water interface under TIR and Non-TIR experimental configurations. The results measured from polarization analysis in TIR configuration consist with those obtained from Non-TIR configuration. This work demonstrates the feasibility and accuracy of polarization analysis in the determination of the orientation angle of molecules at the interfaces under TIR-SHG configuration.
Key words:  Second harmonic generation  Total internal reflection  Hyperpolarizability  Polarization  Orientation angle
FundProject:
全内反射构型下分子在十六烷-水界面取向角度的二次谐波测量
张立波,房辉,陈顺利,朱雪峰,干为
摘要:
测量了在全内反射条件及非全内反射条件下,两种探针分子在十六烷-水界面上的取向角度.通过详细的偏振分析,发现探针分子在两种构型下的取向角度测量结果一致.表明全内反射条件下,取向角度的测量和偏振分析同样是准确且可行的.
关键词:  二次谐波  全内反射  超极化率  偏振  取向角度
DOI:10.1063/1674-0068/29/cjcp1605111
分类号: