Kinetics of azobenzene nitrene oxidation by molecular oxygen in glassy propylene carbonate

Autor:	B. V. Bol'shakov, V. L. Vyazovkin, V. M. Syutkin
Rok vydání:	2011
Předmět:	Diffusion Nitrene Inorganic chemistry Kinetics General Physics and Astronomy chemistry.chemical_element Activation energy Photochemistry Oxygen Reaction rate chemistry.chemical_compound chemistry Propylene carbonate Limiting oxygen concentration Physical and Theoretical Chemistry
Zdroj:	The Journal of Chemical Physics. 135:244504
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.3671637
Popis:	The kinetics of azobenzene nitrene oxidation by molecular oxygen dissolved in a matrix was studied in glassy propylene carbonate. The reaction was carried out in excess oxygen within its concentration range 0.008 to 0.048 M. The oxidation kinetics, controlled by oxygen diffusion, is not described by the exponential function. A specific reaction rate decreases in the course of the process. The higher the oxygen concentration in the matrix, the sharper is the decrease in the reaction rate. It is shown that at all concentrations, the oxidation kinetics is described in the framework of the model of heterogeneous matrix with a characteristic size of heterogeneities of 1.5 nm and a dispersion of the activation energy of oxygen molecule jump of 4 kJ/mol. The reaction radius is about 0.5 nm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c32e9e05e09e5f20585a6a830a8fdfcb https://doi.org/10.1063/1.3671637 Zobrazit plný text záznamu