Details

Autor(en) / Beteiligte

• Li, Haining
• Su, Lei
• Zhu, Xiang
• Cheng, Xuerui
• Yang, Kun
• Yang, Guoqiang

Titel

In Situ Crystallization of Ionic Liquid [Emim][PF6] from Methanol Solution under High Pressure

Ist Teil von

• The journal of physical chemistry. B, 2014-07, Vol.118 (29), p.8684-8690

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The solubility of 1-ethyl-3-methylimidazolium hexafluorophosphate ([Emim][PF6]) in methanol under high pressure is newly measured quantitatively according to the correlation between the ratios of Raman intensity and the concentrations. In situ crystallization and cation conformation of [Emim][PF6] from methanol solution under high pressure have been investigated by using Raman spectroscopy in detail. Remarkably, crystal polymorphism was observed and two crystalline phases (phases I and II) coexisted under high pressure up to ∼1.4 GPa. However, only phase II was obtained by recrystallization at ∼2 GPa. Our findings may facilitate the development of an effective way for crystallization and purification of ionic liquids under high pressure.