THE INFLUENCE OF RADIATION INTENSITY ON THE PATHWAYS OF PHOTOTRANSFORMATIONS OF CONFORMATIONALLY MOBILE MOLECULES

The previously developed method of conformationally-selective laser ph otochemistry is theoretically substantiated. The influence of radiatio n intensity on the kinetics of photochemical reactions involving the f ormation of conformationally mobile photoreaction products is consider ed. The possibility of controlling the reaction kinetics and photoprod uct concentrations by means of creating a non-equilibrium conformation al population upon highly intensive picosecond laser irradiation is ex emplified by the reaction, important in practice, of provitamin D phot oisomerization.