Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Pulse Radiolysis Study of the Reactions of Hydrogen Atoms in the Ionic Liquid Methyltributylammonium Bis[(trifluoromethyl)sulfonyl)]imide



J Grodkowski, James F. Wishart, Pedatsur Neta


Reactions of hydrogen atoms with pyrene, phenanthrene, benzophenone, 2-propanol, and crotonic acid in the ionic liquid methyltributylammonium bis (trifluoromethylsulfonly)imide (R4NNTf2) were studied by pulse radiolysis. Radiolysis of the ionic liquid leads to formation of dry electrons and solvated electrons, which are scavenged by H3O+ to produce H atoms. Hydrogen atoms react very rapidly with pyrene (3.8 x 109 L mol-1 s-1) and phenanthrene (2.9 x 109 L mol-1 s-1) to form H-adduct radicals with sharp absorption peaks at 405 and 395 nm, respectively. They also react with benzophenone to form ring adducts but the reaction is much slower. By competition kinetics with pyrene the rate constants for reaction of H atoms with 2-PrOH and with crotonic acid were extimated to 6 x 107 L mol-1 s-1 and 4.6 x 109 L mol-, respectively. All the rate constants, except for benzophenone, are similar to the values measured or estimated for the same reactions in aqueous solutions. The reactions with aromatic hydrocarbons must diffusion-controlled but are faster that riffusion-controlled reactions for solvated electrons in the same ionic liquid.
Journal of Physical Chemistry A
No. 46


aromatic hydrocarbons, ionic liquids, kinetics hydrogen atoms, pulse radiolysis


Grodkowski, J. , Wishart, J. and Neta, P. (2003), Pulse Radiolysis Study of the Reactions of Hydrogen Atoms in the Ionic Liquid Methyltributylammonium Bis[(trifluoromethyl)sulfonyl)]imide, Journal of Physical Chemistry A (Accessed July 13, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created October 31, 2003, Updated October 12, 2021