Internal Energy Distributions Resulting from Sustained Off-Resonance Excitation in Fourier Transform Ion Syclotron Resonance Mass Spectrometry.II. Fragmentation of the 1-Bromonaphthalene Radical Cation

June 15, 2000

Journal Article

Internal Energy Distributions Resulting from Sustained Off-Resonance Excitation in Fourier Transform Ion Syclotron Resonance Mass Spectrometry.II. Fragmentation of the 1-Bromonaphthalene Radical Cation

Abstract

The collision energy dependence of the fragmentaiton of C10H7Br+? was studied using sustained off-rsonance excitation (SORI) in a 7 T Fourier Trnasform Mass Spectrometer (FTMS). Fragmentation efficiency curves were obtained as a function of collision energy at four different pressures of Ar bath gas corresponding to collision numbers of 3, 5, 15 and 20. The results were modeled using RRKM/QET formalism. A refined analytical form for the collisional energy deposition function is prposed. The ability to obtain accurate framentation energetics of a complex system using the present approach is demonstrated. The "effective temperatures" deduced from the average internal energies for C6H5Br+? and C10H7Br+? were found to be the same for both ions provided the bath gas pressure and the maximum value of center-of-mass collision energy were the same.

Revised: May 20, 2002 | Published: June 15, 2000

Citation

Laskin J., and J.H. Futrell. 2000. Internal Energy Distributions Resulting from Sustained Off-Resonance Excitation in Fourier Transform Ion Syclotron Resonance Mass Spectrometry.II. Fragmentation of the 1-Bromonaphthalene Radical Cation. Journal of Physical Chemistry A 104, no. 23:5484-5494. PNNL-SA-32590.