Infrared Spectroscopy of Neat Solid Ozone and That of Ozone in Interaction with Amorphous and Crystalline Water Ice

Abstract

The interaction of ozone with ice films under high vacuum was studied with single reflection Fourier transform infrared spectroscopy (incidence angle of 5°). Both amorphous and crystalline ice were investigated. On amorphous ice which has a high density of free surface OH groups two states of ozone were observed: one which forms a hydrogen bond with the ice surface of the micropores, and a second which is attributed to a physisorbed state. Only the latter state is observed on the crystalline ice surface. When chemisorbed ozone is covered by an amorphous film, a temperature increase above 60 K leads to diffusion (with a weak yield) of ozone in the water lattice. Absorbed ozone remains in the ice bulk until sublimation of the ice film near 155 K.