Adsorption of benzonitrile at the air/water interface studied by sum frequency generation spectroscopy  

作　　者：LIU AnAn HUANG Zhi DENG GangHua GUO Yuan 

机构地区：[1]Graduate University of the Chinese Academy of Sciences [2]Hefei National Laboratory for Physical Sciences at the Microscale,University of Science and Technology of China [3]Beijing National Laboratory for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences

出　　处：《Chinese Science Bulletin》2013年第13期1529-1535,共7页

基　　金：supported by the Main Direction Program of Knowledge Innovation of Chinese Academy of Sciences (KJCX-EW-W09);the National Natural Science Foundation of China (91027042, 21073199)

摘　　要：In this investigation, the adsorption of benzonitrile at the air/water interface was addressed using vibrational sum-frequency spectroscopy. Using ppp and ssp polarization combinations, the authors detected the symmetric stretching mode of the cyano (CN) group and calculated the orientation of benzonitrile at the interface. In addition, the adsorption isotherm was determined in terms of the hyperpolarizability element by varying the bulk benzonitrile concentration. The adsorption energy was obtained from fitting this isotherm. This work will add to our understanding of chemical processes relevant to retention, degradation, and photolysis of benzonitriles in the environment.In this investigation, the adsorption of benzonitrile at the air/water interface was addressed using vibrational sum-frequency spec- troscopy. Using ppp and ssp polarization combinations, the authors detected the symmetric stretching mode of the cyano （CN） group and calculated the orientation of benzonitrile at the interface. In addition, the adsorption isotherm was determined in terms of the hyperpolarizability element by varying the bulk benzonitrile concentration. The adsorption energy was obtained from fitting this isotherm. This work will add to our understanding of chemical processes relevant to retention, degradation, and photolysis of benzonitriles in the environment.

关 键 词：吸附等温线 空气 水界面 光谱学 和频 腈 偏振组合 模式计算 超极化率 

分 类 号：X132[环境科学与工程—环境科学]