Kinetc Study of Infrared Multiphoton Dissociation. Two-Frequency Irradiation of CF3(13)COCF3 molecules at Natural Abundance

Article abstract of DOI:10.1021/j150609a014

The characteristics of the infrared multiphoton excitation of hexafluoroacetone in region I and region II have been investigated by photolysis with two CO2 laser pulses.The sequenced pulses were at different frequencies and had different fluences so that effects arising in the two regions could be clearly separated.We have studied the isotopically selective dissociation of CF3(13)COCF3 molecules, present at their natural abundance, as a function of five parameters, the frequency of the dissociating second pulse, the fluence of both pulses, the substrate pressure, and the interpulse delay.The results give a picture of the kinetic behavior of vibrationally excited hexafluoroacetone molecules produced in the presence of strong infrared fields.