中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Salt effect on molecular orientation at air/liquid methanol interface

文献类型:期刊论文

作者Guo, Yuan1; Lu, Zhou1; Li, Xia1; Deng, Gang-Hua2; Feng, Rong-Juan1; Lin, Ke3; Zhang, Zhen1; Bai, Yu1
刊名CHINESE CHEMICAL LETTERS
出版日期2016-04-01
卷号27期号:4页码:535-539
关键词Surface Orientation Air/liquid Interface Salt Effect Sum Frequency Generation Methanol
ISSN号1001-8417
DOI10.1016/j.cclet.2016.01.004
文献子类Article
英文摘要The salt effects on molecular orientation at air/liquid methanol interface were investigated by the polarization-dependent sum frequency generation vibrational spectroscopy (SFG-VS). We clarified that the average tilting angle of the methyl group to be theta = 30 degrees +/- 5 degrees at the air/pure methanol surface assuming a delta-function orientational distribution. Upon the addition of 3 mol/L NaI, the methyl group tilts further away from the surface normal with a new theta = 41 degrees +/- 3 degrees. This orientational change does not explain the enhancement of the SFG-VS intensities when adding NaI, implying the number density of the methanol molecules with a net polar ordering in the surface region also changed with the NaI concentrations. These spectroscopic findings shed new light on the salt effects on the surfaces structures of the polar organic solutions. It was also shown that the accurate determination of the bulk refractive indices and Raman depolarization ratios for different salt concentrations is crucial to quantitatively interpret the SFG-VS data. (C) 2016 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
WOS关键词LIQUID-VAPOR INTERFACE ; GENERATION VIBRATIONAL SPECTROSCOPY ; AIR/WATER INTERFACE ; AQUEOUS INTERFACES ; WATER-SURFACE ; IONS ; SIMULATIONS ; SEGREGATION
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000375506600010
出版者ELSEVIER SCIENCE INC
源URL[http://cas-ir.dicp.ac.cn/handle/321008/170806]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者Guo, Yuan; Lu, Zhou
作者单位1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
3.Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Peoples R China
推荐引用方式
GB/T 7714
Guo, Yuan,Lu, Zhou,Li, Xia,et al. Salt effect on molecular orientation at air/liquid methanol interface[J]. CHINESE CHEMICAL LETTERS,2016,27(4):535-539.
APA Guo, Yuan.,Lu, Zhou.,Li, Xia.,Deng, Gang-Hua.,Feng, Rong-Juan.,...&Bai, Yu.(2016).Salt effect on molecular orientation at air/liquid methanol interface.CHINESE CHEMICAL LETTERS,27(4),535-539.
MLA Guo, Yuan,et al."Salt effect on molecular orientation at air/liquid methanol interface".CHINESE CHEMICAL LETTERS 27.4(2016):535-539.

入库方式: OAI收割

来源:大连化学物理研究所

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