Thermal electron reactions and RRKM theory

PHYS 600

Edward C. M. Chen, ecmc@houston.rr.com1, Edward S. Chen, echen@rice.edu2, Mark Sabaugh, ecmc@houston.rr.com3, and Winston Chang, ecmc@houston.rr.com3. (1) University of Houston Clear Lake, Houston, TX 77025, (2) University of Houston, MS-41, 6100 S. Main, Houston, TX 77005, (3) The Wentworth Foundation, 4039 Drummond, Houston, TX 77025
Fifty years ago, no molecular electron affinities, acidities or rate constants for thermal electron attachment to organic molecules had been measured. Gas phase reactions of thermal electrons have been studied with the electron capture detector and negative ion mass spectrometry since 1960. These Results were examined with RRKM theory and Morse potential energy curves. The ability of low energy electrons to induce bond breaking in DNA and proteins is related to these properties. We have applied the above methods to atmospheric pollutants, carbon clusters, hydrocarbons, electron acceptors, adenine, guanine, cytosine, uracil and thymine and amino acids. We will briefly review examples for rate constants of the fluoronitrobenzene anions with the largest preexponential for dissociative thermal electron attachment and SF6 which has the largest rate constant for non-dissociative thermal electron attachment and present new calculations for nucleic acids, the amino acids, and the Watson Crick hydrogen bonded base pairs.
 

Poster Session
7:30 PM-10:00 PM, Wednesday, 13 September 2006 Moscone Center -- Hall D, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Sci-Mix

Division of Physical Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006