2010 Fiscal Year Final Research Report

NOE study on ionic salvation for water and benzene in ionic liquids

Research Project

Project/Area Number	20550014
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Physical chemistry
Research Institution	Kyoto University
Principal Investigator	WAKAI Chihiro Kyoto University, 化学研究所, 助教 (40293948)
Co-Investigator(Kenkyū-buntansha)	MATUBAYASI Nobuyuki 京都大学, 化学研究所, 准教授 (20281107)
Co-Investigator(Renkei-kenkyūsha)	NAKAHARA Masaru 京都大学, 化学研究所, 教授 (20025480)
Project Period (FY)	2008 – 2010
Keywords	イオン液体 / 溶媒和 / 液体構造 / ベンゼン / NOE / NMR
Research Abstract	We have investigated the ionic salvations to formic acid, water, and benzene molecules in ionic liquids by means of the nuclear magnetic resonance. Formic acid is stabilized by ions and formed from hydrogen and carbon dioxide in ionic liquids. Water molecules are solvated by strong acids existing as impurities and double recrystallization can remove the strong acids. We have shown by means of the nuclear Overhauser effect measurement that such a polar solute as water is interacted with a hydrogen atom at site-2 in the imidazolium ring while such a non-polar solute as benzene is parallel to the imidazolium ring.