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Published on: December 27, 2018
Processes of luminescence quenching in study of molecular oxygen diffusion in glassy matrices
1Institute of Chemical Kinetics and Combustion, ul Institutskaya 3, Novosibirsk, Russia.
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).
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