Journal of Physical Chemistry, Vol.99, No.42, 15438-15443, 1995
Photodissociation and Rare-Gas Reactions of Ccl3(2+) - Energetic Thresholds for the Ccl+ Product
This article reports the results of experiments to determine the energetic threshold for CCl+ production from CCl32+ by collisions with rare gases and by laser photofragmentation. An array of product channels is observed for the reactions of CCl32+ With the rare gases at low (<100 eV) laboratory collision energy. By varying the ion translational energy with Ne as the collision partner, the signal of CCl+ increases dramatically at a center-of-mass collision energy of 7-9 eV. Photolysis of CCl32+ produces CCl22+, CCl2+, and Cl+ at 1064 nm; when the laser wavelength is tuned to shorter wavelengths, the fragment CCl+ occurs in the product mass spectrum as well. By surveying with a tunable laser wavelength, the threshold to create the CCl+ fragment by the photodissociative channel is a much different value, approximate to 2.2 +/- 0.1 eV, suggesting that different excited states are involved in the collisional and photodissociative processes.
Keywords:COLLISION-INDUCED DISSOCIATION;CHARGE-TRANSFER;PHOTOFRAGMENT SPECTROSCOPY;ELECTRON-CAPTURE;N-2(2+);IONS;STATE;MOLECULES;TRANSITION;DICATIONS