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Steven D. Chambreau, 1, a Jerry A. Boatz, 1, b Ghanshyam L.Vaghjiani, 1, b

Selected-Ion Flow Tube Mass Spectrometric Investigations of the Reactions Between Several Different Ions and Ionic Liquid Vapors. Steven D. Chambreau, 1, a Jerry A. Boatz, 1, b Ghanshyam L.Vaghjiani, 1, b Jeffrey F. Friedman, 2 ,c,d Nicole Eyet, 2 ,d,e A. A. Viggiano 2

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Steven D. Chambreau, 1, a Jerry A. Boatz, 1, b Ghanshyam L.Vaghjiani, 1, b

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  1. Selected-Ion Flow Tube Mass Spectrometric Investigations of the Reactions Between Several Different Ions and Ionic Liquid Vapors Steven D. Chambreau,1,aJerry A. Boatz,1,bGhanshyam L.Vaghjiani,1,b Jeffrey F. Friedman,2,c,d Nicole Eyet,2,d,eA. A. Viggiano2 1Space and Missile Propulsion Division, Propulsion Directorate, Air Force Research Laboratory, AFRL/RZSP, Edwards Air Force Base, CA 93524 2 Space Vehicles Directorate, Air Force Research Laboratory, AFRL/RVBXT, Hanscom Air Force Base, MA 01731 Results Introduction • Extremely low vapor pressures of ionic liquids (IL) • Detection of IL vapors very difficult • Many ILs are thought to vaporize as intact ion pairs: C+A- • Evaporated ion pairs are easily dissociated upon ionization: • C+A-  C+ + A· + e- • Can we attach a third ion to the ion pair for detection? • Can we look for ion exchange/charge transfer reactions? HEATED IONIC LIQUID VAPOR INLET 62 453 T = 170 K Experimental: SIFT Spectroscopy Conclusions • Cooling facilitates detection of ion + ion pair products • See ion addition or ion exchange reactions: (NTf2-) • See charge transfer reactions: (dca-) 139 125 169 Future Work Acknowledgements 179 • Kinetics measurements • Branching ratios • ab initio calculations • Role of impurities Mike Berman/AFOSR Tom Hawkins Stefan Schneider 155 152 • aERC, Inc • bPropellants Branch, email: ghanshyam.vaghjiani@edwards.af.mil • cUniversity of Puerto Rico • dBoston College • eSt. Anselm College 139 PA Public Affairs Clearance Number . 96 125 82

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