Orientation and Structure of Ionic Liquid Cation at Air/[bmirn][BF4] Aqueous Solution Interface

doi:10.1063/1674-0068/26/05/569-575

CORC > 化学研究所 > 中国科学院化学研究所

	Orientation and Structure of Ionic Liquid Cation at Air/[bmirn][BF4] Aqueous Solution Interface
	Deng, Gang-hua 1; Li, Xia 2; Guo, You-qi 3; Liu, Shi-lin 1; Lu, Zhou 2; Guo, Yuan 2
刊名	CHINESE JOURNAL OF CHEMICAL PHYSICS
	2013-10-01
卷号	26 期号:5 页码:569-575
关键词	Sum Frequency Generation Vibratinal Spectroscopy Ionic Liquid Aqueous Solution Interface Orientation
ISSN号	1674-0068
DOI	10.1063/1674-0068/26/05/569-575
英文摘要	The water-miscible room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) is a model system for studying the interactions between ionic liquid and water molecules. In this work the orientational structure of the low concentrated aqueous solution of [bmim][BF4] at the air/liquid interface was investigated by sum frequency generation vibrational spectroscopy. It has been found that at very low concentrations, the butyl chain exhibited a significant gauche defect, indicating a disordered conformation; and the cation ring oriented with a fairly small tilting angle at the surface. When the concentration increased, the cation ring tended to lie flat at the surface, and the gauche defects of the butyl chain decreased due to the intermolecular chain-chain interactions and the consequent more ordered interfacial molecular arrangement. Additionally, the anti-symmetric stretching mode in the PPP and SPS spectra exhibited a peak shift, showing that there exists more than one kind of orientation or chemical environment for the butyl CH3 group. These results may shed new light on understanding the surface behavior of water-miscible ionic liquids as well as the imidazolium based surfactants.
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000326985400012
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42025]
专题	中国科学院化学研究所
通讯作者	Lu, Zhou
作者单位	1.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Nanjing Univ Aeronaut & Astronaut, Nanjing 211106, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Deng, Gang-hua,Li, Xia,Guo, You-qi,et al. Orientation and Structure of Ionic Liquid Cation at Air/[bmirn][BF4] Aqueous Solution Interface[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2013,26(5):569-575.
APA	Deng, Gang-hua,Li, Xia,Guo, You-qi,Liu, Shi-lin,Lu, Zhou,&Guo, Yuan.(2013).Orientation and Structure of Ionic Liquid Cation at Air/[bmirn][BF4] Aqueous Solution Interface.CHINESE JOURNAL OF CHEMICAL PHYSICS,26(5),569-575.
MLA	Deng, Gang-hua,et al."Orientation and Structure of Ionic Liquid Cation at Air/[bmirn][BF4] Aqueous Solution Interface".CHINESE JOURNAL OF CHEMICAL PHYSICS 26.5(2013):569-575.