title: Processes of luminescence quenching in study of molecular oxygen diffusion in glassy matrices.
abstract: The methods have been developed for studying oxygen mobility by donor quenching in solutions with uniform concentration and in geminate pairs in a solid phase. It is shown that the kinetics of luminescence variations with time is described by a diffusion model. Oxygen mobility has been studied at low temperatures (77 K) in hard polymer matrices. squalane. glasses of low-molecular hydrocarbons and alcohols. The methods can be used to measure very low oxygen mobility with a diffusion coefficient of about 10(-23) cm2 s(-1).
authors.affiliation: Institute of Chemical Kinetics and Combustion, ul Institutskaya 3, Novosibirsk, Russia.
authors.forename: V V
authors.initials: VV
authors.lastname: Korolev
authors.forename: N M
authors.initials: NM
authors.lastname: Bazhin
mesh_terms: D004058:Diffusion; D005453:Fluorescence; D005898:Glass; D049449:Luminescence; D010100:Oxygen / Q000737:chemistry*; D011108:Polymers; D012996:Solutions; D013997:Time Factors
chemical_list: D011108:Polymers; D012996:Solutions; D010100:Oxygen