Kinetic and Spectroscopic Studies of Transient Species Prepared by Irmpd

Infrared multiple photon absorption is known to be observed in some triatomic and most polyatomicmolecules. When the number of absorbed photons is high enough the process leads to photodissociationand excess energy is released as vibrational, rotational and translational energy in the electronic groundstate of the fragments. The contribution of these energies is determined by standard methods, that includelaser induced fluorescence, LIF, and time-resolved Fourier transform spectroscopy, TR-FTS. Examplesof selected determinations are shown. Once produced, identified and characterized, the kinetic behaviour of the transients with selectedreactants can be studied. In particular, removal rate constants of substituted carbenes, in specificvibrational and electronic states, by atoms, olefins and simple molecules are mentioned.