Implementation of laser induced fluorescence technique to study the kinetics of radicals generated in the IR multiphoton dissociation of chloroform

N. D. GOMEZ; V. M. FREYTES; J. CODNIA; F.A.MANZANO; M.L. AZCÁRATE

Journal of Physics Conference Series

IOP Publishing

Lugar: Washigton; Año: 2011 vol. 274 p. 12097 - 12098

1742-6596

In this work we present the design of an experimental facility for the study of the reaction mechanisms that follow the fragmentation produced by the Infrared Multiphotonic Dissociation of molecules of technological interest. The design of the experiment was done by the coupling of the Laser Induced Fluorescence LIF and Infrared Multiphoton Dissociation IRMPD techniques. The LIF technique was applied for the determination of the rate constants of the reactions of the CCl2 radicals with O2 and HCl, where the CCl2 radicals were obtained by the IRMPD of CDCl3. For the couplings of the two techniques the synchronization of a CO2 TEA laser and a dye laser was donde. The CO2 TEA laser was employed for the dissociation of the CDCl3 molecule, and the dye laser for the electronic excitation of the CCl2 radicals who´s relaxation to the ground level produced the fluorescence signal. We present also the data acquisition system developed and the kinetic model employed for the fitting of the experimental data for the determination of the rate constants kO2 and kHCl.