Seminars Archive

Excited State Conformation of Supermolecular Systems.

Abstract
In the last years the international community has focus its own attention on the study of properties and conformation of molecular and supermolecular systems. It is clear now that different structures and conformations match to different properties. The aim is to understand why some systems are more stable that others and how this affects their photoreactivity. The structural characterization of these systems lead to a detailed description of the potential surface for the interaction. The acting force are typically non-covalent and their energies are weak. Therefore, detailed results are achievable using gas phase isolation methods in order to avoid strong perturbation to the system from chemical environment. In this respet, results obtained on spectroscopic characterization of biomolecular van der Waals complexes are reported during the talk. Mass-selected photoionization spectroscopy and high resolution methods were used to in order to access the structure of these systems and the dynamics following the S1 <- S0 excitation. The examined complexes - formed by small organic molecule and inorganic one - show different properties depending from interacting groups, or better from the electronic density on them and the changing upon electronic excitation.