Molecular dissociation begun selectively with lasers in the infrared and ultraviolet regions

We have studied the contribution of the different collisional mechanisms that take place in the processes of absorption and dissociation for infrared radiation laser.

The application has been finished to the molecules CF₂HCl and C₃F₆ of the quantitative pattern developed by McRae and extended by us, beginning its application to the molecule C₆H₅-SiH₃. In the case of the C₃F₆, it has been carried out in irradiation carried out by one or two wavelength.

We have studied the excitement process and dissociation in real time.

It has been carried out a study in real time of the dissociation of the molecule H₃SiCH=CHCl. On one hand the spontaneous luminiscence has been analyzed that has place in the processes of absorption and multiphotonic dissociation, it has been determined the radiative lifetime and the quenching speed by homogeneous collisions of this radiation, and its emission has been assigned to an inverse mechanism of electronic relaxation of the fragment SiH₂, formed in the process of the molecule precursor's dissociation. On the other hand, by means of a dye laser pumped by another of nitrogen, the technique of Induced Fluorescence has been applied by Laser to some of the fragments taken place in the dissociation of the cloroetenilsilane. Starting from the spectrum of excitement of the obtained fluorescence, it is deduced that most of the population of the fragments SiH₂ that are formed in the dissociation process are vibrational "hot". The results obtained in this study in real time, confirm the dissociation channels that had intended for this molecule.

Main