Monday, May 19, 2008
Student Union Building, Upper (Queensborough Community College)
286

Properties of DABCO Containing Ionic Liquids

Kijana Kerr1, Marie Thomas2, Gopal Subramaniam2, James F. Wishart3, and Sharon Lall-Ramnarine1. (1) Queensborough Community College, CUNY, Bayside, NY, (2) Queens College, CUNY, Flushing, NY, (3) Brookhaven National Laboratory, Upton, NY

We report here on the synthesis of DABCO (diazabicyclo[2.2.2]octane) containing ionic liquids (ILs) using thermal and microwave assisted reaction methods. ILs were synthesized using several alkyl halides including ethoxyethyl, ethoxymethyl, hydroxylpropyl and butyl. Structures were confirmed using H-1 and C-13 Nuclear Magnetic Resonance (NMR) spectroscopy. The halide salts were converted into NTf2 ILs using anion exchange. These new ILs were characterized for there thermal properties using Differential Scanning Calorimetry (DSC). NTf2-containing ILs melt at lower temperatures than halide-containing ILs, as expected. Many of the disubstituted compounds are high-melting salts and not ILs. However some species such as the dihydroxypropyl NTf2 IL exhibits melting points below 100 �C. This work was supported in part at BNL by the U. S. DOE Office of Basic Energy Sciences under contract DE-AC02-98CH10886 and the Louis Stokes Alliance for Minority participation.