Interaction of Levitated Ionic Liquid Droplets with Water

被引：19
作者：
Schenk, Jonas [1 ]
Panne, Ulrich [1 ,2 ]
Albrecht, Merwe [1 ]
机构：
[1] BAM Fed Inst Mat Res & Testing, D-12489 Berlin, Germany
[2] Humboldt Univ, Dept Chem, D-12489 Berlin, Germany
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2012年 / 116卷 / 48期
关键词：
1-ETHYL-3-METHYLIMIDAZOLIUM ETHYL SULFATE; PHYSICAL-PROPERTIES; RAMAN-SPECTROSCOPY; VIBRATIONAL SPECTROSCOPY; INFRARED-SPECTROSCOPY; ORGANIC-SOLVENTS; METHYL-SULFATE; AB-INITIO; MIXTURES; TEMPERATURE;
D O I：
10.1021/jp309661p
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of a humid or dry atmosphere on acoustically levitated ionic liquid droplets was studied by volumetric analysis and vibrational spectroscopy. Imidazolium-based ionic liquids with two types of anions, fluorinated (BF4 and PF6) and alkylsulfate anions, were investigated. The amount of absorbed water was correlated with structural differences of the ionic liquids and analyzed in terms of equilibrium mole fraction as well as absorption rate. The type of anion had the most significant influence on the amount of adsorbed water from the atmosphere. Furthermore, spectral changes in the in situ Raman spectra due to absorbed water were studied for all investigated ionic liquids. For 1-ethyl-3-methylimidazolium ethylsulfate, an exemplary detailed analysis of the intermolecular interactions between cations, anions and water was carried out based on the spectroscopic data. The observed band shifts were explained with a hydrogen bond between the anion and water.
引用
收藏
页码：14171 / 14177
页数：7
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