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Nigel Adams - University of Georgia

Thursday, May 28 – 1:15-2:00PM

 

“Gas Phase Ionic Reactions: Rates and Products”

 

In chemical modeling of molecular synthesis in interstellar gas clouds and planetary ionospheres, a great deal of kinetic data (rate constants and products) is required. These data are for a variety of reaction mechanisms and at the temperatures appropriate to these media. The various mechanisms (predominantly charge transfer, proton transfer, hydride ion abstraction, electron attachment, associative detachment, association, electron-ion dissociative and ion-ion recombinations as well as some other more minor reactions) will be discussed. These types of measurements are made predominantly using Selected Ion Flow Tubes (SIFT) for studying ion-neutral reactions and Storage Rings and Flowing Afterglows for electron-ion recombination with the latter also being used for ion-ion recombination. These experimental methods for obtaining the data will be described.

 

Related Reference(s):

J. L. McLain, C. D. Molek, D. Osborne Jr., and N. G. Adams, “Flowing afterglow studies of the electron recombination of protonated cyanides (RCN)H + and their proton-bound dimer ions (RCN) 2H + where R is H, CH 3, and CH 3CH 2,” Int. J. Mass. Spec., 282, 85–90 (2009).

C. D. Molek, J. L. McLain, V. Poterya, and N. G. Adams, “A Remeasurement of the Products for Electron Recombination of N 2H + Using a New Technique: No Significant NH + N Production,” J. Phys. Chem. A, 111, 6760-6765 (2007).