Subject of Study: ozone in its low-temperature decomposition reactions. Objective of Study: determination of the relationship between the composition and reactivity of oxide carrier anchored hexamethylenetetramine, oxialdimines, and their complexes with Cu(II), Co(II) and Mn(II) in the low-temperature ozone decomposition. Research Methods: kinetic, spectral (IR, EPR, and SDR), chromatographic, chemical, atomic absorptive, thermogravimetric, and dynamic. Theoretical and Practical Results and Novelty: some regularities of the low-temperature ozone decomposition by oxide carrier anchored hexamethylenetetramine (HMTA/SiO2, HMTA/Al2O3), oxialdiminepropyls (L/Si), as well as by their complexes МCl2xHMTAxH2O/SiO2 and ML2/Si (M = Cu(II), Co(II), and Mn(II)) have been found. The nonprotonated (molecular) HMTA form bound with a carrier (SiO2, Al2O3) surface by hydrogen bonds has been found to be more active in the ozone decomposition than the protonated HMTA form. The mechanism of ozone interaction with HMTA that includes stages of both initiation and promotion of chain-radical ozone decomposition has been determined. First, it has been demon-strated that the catalytic activity of МCl2xHMTAxH2O/SiO2 complexes, where HMTA molecule is weakly bound with a central atom per a water molecule and acts as an intra-spherical ligand, is much higher than the activity of ML2/Si and МCl2xH2O/SiO2 (M = Cu, Co, and Mn) complexes. First, the orders of activity in the ozone decomposition of aerosol-immobilized ligands, oxialdimines, and their complexes with Cu(II), Co(II), and Mn(II) have been obtained. The activity of ML2/Si complexes depends on both a ligand and a central atom nature as well as on the coordination unit geometry. The regularities found give a theoretic base to predict the effect of both organic ligands and central atoms on the redox processes in which gaseous oxidizers (О3, NO, etc.) hazardous to human beings and environment participate. The kinetic constants of ozone decomposition by ML2/Si complexes can be used for the ascertainment of correlations between the reactivity and the bioactivity of the complexes. The reactivity orders for ML2/Si complexes can be used for the prediction of redox potential changes for Mn+1/M pairs of the complexes. Degree of inculcation: the results of the work have been applied in the studies of Department of Inorganic Chemistry and Chemi-cal Ecology, series of lectures "Ecological Catalysis", topics: "Physicochemical bases of 3d metal complexes immobilization on porous carriers" and "Physicochemical bases of the air purification from ozone". The compositions containing HMTA and a carrier for the low-temperature ozone decomposition in personal respiratory protective devices have been developed and patented. They enable to purify the air from ozone down to its concentrations less than the maximum permissible concentration. Field of application: inorganic chemistry.
