ИСТИНА

https://nanobiomat.eu/previous-editions/ Ozone is known as one of the strongest oxidizing agents in nature, that induce it's main areas of application - air cleaning, water treatment, extraction of metals from ores, oxidizing processes in chemical technology, disinfection, semiconductor production, therapy and sterilization of medical instruments, agricultural production and food storage. It is known that ozone can be destroyed by various ways. Photolysis of ozone is well studied and belongs to reactions with a non-thermal activation. Thermal and catalytic methods are also used in industry for O3 decomposition. However, the behavior of ozone at low temperatures is not studied well, especially when it is adsorbed on various surfaces. The significance of O3 for atmospheric processes is also important which causes great interest in fluctuations in its concentration associated with the processes of formation and destruction. Being an optically active gas, stratospheric ozone absorbs ultraviolet radiation from the Sun with a wavelength of about 220 nm, which determines thermal regime of the stratosphere, prevents the penetration of biologically active ultraviolet radiation to the surface of the planet and significantly affects the temperature stratification. Besides photochemical decay, halogenated pollutants can interact with ozone in condensed state. Physico-chemical characteristics of such heterogeneous processes are almost not studied. Present work summarize the results of the laboratory simulation of chemical heterogeneous reactions of ozone with halogen-containing compounds. Experimental study of non-photolytic heterogeneous chemical reactions is complicated by a number of approximations. Some of them can be avoided due to the use of grazing angles reflection IR spectroscopy, that allow to neutralize the influence of such experimental features of heterogeneous reactions as the thickness of the reactants layer and the homogeneity of their distribution on the surface. Since the literature data on the vibrational frequencies of chlorine and bromine oxides in their IR spectra are contradictory and essentially depend on the registration conditions, non-empirical ab-initio quantum-chemical calculations we applied. Using these approaches heterogeneous reactions of halogenated alkanes, acetic acids and benzenes with various degrees of substitution, CHCl3 and CHBr3 with ozone under low temperatures and pressures were studied by low-temperature IR spectroscopy.