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| Ionic liquid-air interface probed by sum frequency generation spectroscopy and molecular dynamics simulation: influence of alkyl chain length and anion volume | |
| Huo, Feng1; Ding, Jian1,2; Tong, Jiahuan1; He, Hongyan1 | |
| 2021-10-01 | |
| Source Publication | MOLECULAR SIMULATION
 |
| ISSN | 0892-7022 |
| Pages | 11 |
| Abstract | Understand the structure of the ILs/air interface on a molecular level is significant. In this work, the liquid-air interface of a class of ILs containing 1-alkyl-3-methylimidazolium cations ([C(n)mim](+), n = 4, 6 and 8) was investigated by a sum-frequency generation vibrational spectroscopy experiment. The length of the alkyl chain of cations and anion type (tetrafluoroborate ([BF4](-)), thiocyanate ([SCN](-)), dicyanamide ([DCA](-)), hexafluorophosphate ([PF6](-))) were varied to determine their intrinsic effects to the micro-structure on the interface. Meanwhile, combining with the experiment, the orientation angle and surface density for cations and anions of ILs at the air interface was analyzed by molecular dynamics simulation. It is found that the butyl side chain of cations protrudes out into the air as well as the orientation angle between the side chain and interface is 30 degrees-50 degrees. Meanwhile, the anion volume of ILs has almost no influence on the butyl side chain and the methyl on the side chains tend almost planar to the interface with the increased chain length. This research is highly significant for the theoretical and quantitative understanding of the interface chemistry of imidazole-based ILs. |
| Keyword | Ionic liquids interface sum-frequency generation vibrational spectroscopy molecular dynamics simulation |
| DOI | 10.1080/08927022.2021.1979539 |
| Language | 英语 |
| WOS Keyword | VIBRATIONAL SPECTROSCOPY ; AIR/LIQUID INTERFACE ; ORGANIC FRAMEWORKS ; CO2 REDUCTION ; SURFACE ; WATER ; ORIENTATION |
| Funding Project | General Programme of National Natural Science Foundation of China[21878295] ; General Programme of National Natural Science Foundation of China[22078321] ; Beijing Natural Science Foundation[2192052] |
| WOS Research Area | Chemistry ; Physics |
| WOS Subject | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
| Funding Organization | General Programme of National Natural Science Foundation of China ; Beijing Natural Science Foundation |
| WOS ID | WOS:000703431200001 |
| Publisher | TAYLOR & FRANCIS LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/50306 |
| Corresponding Author | Huo, Feng |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, Beijing, Peoples R China 2.China Univ Petr, Coll Chem Engn, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Huo, Feng,Ding, Jian,Tong, Jiahuan,et al. Ionic liquid-air interface probed by sum frequency generation spectroscopy and molecular dynamics simulation: influence of alkyl chain length and anion volume[J]. MOLECULAR SIMULATION,2021:11. |
| APA | Huo, Feng,Ding, Jian,Tong, Jiahuan,&He, Hongyan.(2021).Ionic liquid-air interface probed by sum frequency generation spectroscopy and molecular dynamics simulation: influence of alkyl chain length and anion volume.MOLECULAR SIMULATION,11. |
| MLA | Huo, Feng,et al."Ionic liquid-air interface probed by sum frequency generation spectroscopy and molecular dynamics simulation: influence of alkyl chain length and anion volume".MOLECULAR SIMULATION (2021):11. |
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