Kijana Kerr1, Sharon Lall-Ramnarine1, Marie Thomas2, Robert Engel2, Tomasz Szreder3, and James F. Wishart3. (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 a series of ether and hydroxyl containing halide salts based on DABCO diazabicyclo[2.2.2]octane, for conversion into ionic liquids with varying anions. Some of these halide salts have been converted into liquid ionic phosphates (LIPs) and bis(trifluoromethylsulfonyl)imides. The halide salts were synthesized by reacting an alkyl halide with DABCO using microwave assisted synthetic techniques and conventional methods. The corresponding ionic liquids were synthesized by anion exchange. Microwave assisted synthetic reaction conditions such as temperature, the nature of the reaction solvent and length of reaction time have been varied. Results show that quaternization has been achieved. Structure determination of these ionic liquids was done using 1H, 13C and 31P NMR. Preliminary characterization including differential scanning calorimetry (DSC) of a homologous series of compounds is reported. Dramatic differences in melting points were observed with anion variation of DABCO compounds. Future work will focus on continuing the synthesis and characterization of these compounds. Supported in part by US DOE contract DE-AC02-98-CH1088 at BNL and the Louis Stokes Alliance for Minority Participation program at CUNY.
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