Processi di rilassamento strutturali in liquidi studiati mediante spettroscopia laser

An analysis of Rayleigh wing spectra on two isomers of propanol ($C_3H_7OH$) and on two its Br-based isomorphous ($C_3H_7Br$), is presented. The performed measurements, over a wide temperature range, allow us to identify two different processes characterizing the response of both the alcohols. A comparison between the rotational dynamics of the linear normal-propanol (1-Propanol) and the more sterically hindered iso-propanol (2-Propanol) is performed. At the same time, the role played by the H-hond in the associative properties of hydrogenous systems is investigated by comparing the dynamical response of the two alcohols with that of 1-Br propane and 2-Br propane, in which the O-H “active” sites are replaced by “inert” bromine atoms.