title: Infrared spectroscopy of ozone and hydrogen chloride aerosols.
abstract: Aerosols of ozone have been generated in a collisional cooling cell and observed over a small temperature range via FTIR spectroscopy, with the phase transition from the vapour taking place in the range 80-84 K. The condensed phase bands at 1038 cm(-1) (nu3) and 2105 cm(-1) (nu1+nu3) were assigned to the liquid phase. Aerosols were also generated from mixtures of ozone and HCl. In the presence of liquid ozone aerosols, evidence of solvated HCl was observed via a broad IR band 2795 cm(-1). Notably, production of a metastable, amorphous solid phase of HCl (exhibiting a narrow band at 2780 cm(-1)) was favoured to the extent that it could be generated in large excess over the crystalline orthorhombic form that usually dominates at 80 K.
authors.affiliation: School of Chemistry, Monash University, Victoria 3800, Australia.
authors.forename: Chris
authors.initials: C
authors.lastname: Medcraft
authors.forename: Evan G
authors.initials: EG
authors.lastname: Robertson
authors.forename: Chris D
authors.initials: CD
authors.lastname: Thompson
authors.forename: Sigurd
authors.initials: S
authors.lastname: Bauerecker
authors.forename: Don
authors.initials: D
authors.lastname: McNaughton
mesh_terms: D000336:Aerosols / Q000737:chemistry*; D001272:Atmosphere / Q000032:analysis* / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D005740:Gases / Q000737:chemistry; D010126:Ozone / Q000737:chemistry*; D010316:Particle Size; D052638:Particulate Matter / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods*
chemical_list: D000336:Aerosols; D002712:Chlorides; D005740:Gases; D052638:Particulate Matter; D010126:Ozone