Photoreactivity of Molecular Aggregates

Abstract

AbstractThe spectroscopy and photoreactivity of atmospheric trace gases embedded in clusters is examined in this work. Perturbations induced by intermolecular interactions are obtained in order to evaluate the role that the heterogeneous photochemistry of such species could play in the chemical balance of the atmosphere. – Spectroscopic effects are monitored using aggregates produced in supersonic jets and measured by high resolution Fourier Transform direct ultraviolet absorption techniques. These spectra are compared with those of the isolated molecule to extract shifts and intensity changes when the chromophore is clustered. Photochemical studies involve laser pump‐probe experiments with mass resolved multiphoton ionization detection. Changes in the isolated molecule photochemistry are monitored as a function of cluster formation. – This paper discusses the methodology developed as well as the specific example of clusters of ozone with atmospheric trace gases.