title: Manganese(II) Complexes with Schiff Bases Immobilized on Nanosilica as Catalysts of the Reaction of Ozone Decomposition.
abstract: In this article, we submit the description of synthesis and identification of manganese(II) complexes with pyrogenic nanosilica-immobilized (d av = 10 nm; S sp = 290 m(2)/g) hydroxyaldimine ligands [Formula: see text]: salicilaldiminopropyl (L1); 5-bromosalicilaldiminopropyl (L2); 2-hydroxynaphtaldiminopropyl (L3); 2-hydroxy-3-methoxybenzaldiminopropyl (L4); 2-hydroxy-3,5-dichloroacetophenoniminopropyl (L5); and 4-hydroxy-3-methoxybenzaldiminopropyl (L6). The ligands and complexes were characterized by UV-VIS and IR spectrometry. Nanocomposites consisting of complexes [Formula: see text] showed a high catalytic activity in low-temperature ozone decomposition in the range of concentrations between 2.1 × 10(-6) and 8.4 × 10(-6) mol/l. The number of catalytic cycles increased for isostructural pseudotetrahedral complexes [Formula: see text] (L1-L5) in the following order: Mn(L3)2 >> Mn(L4)2 > Mn(L1)2 > Mn(L2)2 > Mn(L5)2. In the case of pseudooctahedral complexes with L6, the change of coordination polyhedral does not influence the kinetics and stoichiometric parameters of the reaction.
authors.affiliation: Odesa I.I. Mechnikov National University, 2 Dvoryanska str., Odesa, 65082, Ukraine. tlr@onu.edu.ua.
authors.forename: Tetyana
authors.initials: T
authors.lastname: Rakytska
authors.affiliation: Odesa I.I. Mechnikov National University, 2 Dvoryanska str., Odesa, 65082, Ukraine.
authors.forename: Alla
authors.initials: A
authors.lastname: Truba
authors.affiliation: Taras Shevchenko National University of Kyiv, 64 Volodymyrska str., Kyiv, 01601, Ukraine.
authors.forename: Evgen
authors.initials: E
authors.lastname: Radchenko
authors.affiliation: Taras Shevchenko National University of Kyiv, 64 Volodymyrska str., Kyiv, 01601, Ukraine.|National University of Kyiv-Mohyla Academy, 2 Skovorody str., Kyiv, 04655, Ukraine.
authors.forename: Alexander
authors.initials: A
authors.lastname: Golub
keywords: Catalytic ozone decomposition; Manganese(II) complexes; Nanosilica; Schiff bases