Details

Autor(en) / Beteiligte

• Yoshimura, Yukihiro
• Mori, Takahiro
• Kaneko, Kazuyoshi
• Hattori, Shuji
• Takekiyo, Takahiro
• Masuda, Yuichi
• Shimizu, Akio

Titel

Raman investigation on the local structure of alcohols in 1-butyl-3-methylimidazolium tetrafluoroborate

Ist Teil von

• Journal of molecular liquids, 2019-11, Vol.293, p.111508, Article 111508

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• In this study, we investigated the evolution of the local structure of a series of primary alcohols from methanol to octanol in 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) as a function of alcohol concentration using Raman spectroscopy, with the aim of gaining more insight into the fundamentals of the compelling ionic liquid–molecular solvent interactions at molecular level. The Raman spectra revealed the presence of various types of OH species in the mixtures, with the major fractions at low alcohol concentration corresponding to monomers, which indicates that most of the alcohol molecules are isolated from each other. A plausible picture for the changes in the local structures of alcohol molecules loosely confined in the [bmim][BF4] matrix is presented, which suggests the occurrence of conformational changes in the bmim+ cation and the alcohol molecules. This observation may indicate a unique evolution of the local structure of alcohol clusters formed in the ionic liquid. [Display omitted] •Evolution of the microstructure of a series of primary alcohols in [bmim][BF4] was investigated by Raman spectroscopy.•Occurrence of conformational changes in the [bmim]+ cation and the alcohol molecules in the mixtures was suggested.•At low alcohol concentrations, most of the alcohol molecules are isolated from each other in the mixtures.