Pankratov D.A., Rodionova L.I., Borisova N.E., Smirnov A.V., Diagnosis of binuclear iron complexes with acyclic Schiff bases as catalysts in partial isobutane oxidation by Mössbauer spectroscopy. /XII International Conference "Mössbauer Spectroscopy and its Applications.", Suzdal, Russia, October 06-10, 2012, P.136
Mössbauer spectroscopy study of binuclear iron complexes with macrocyclic Schiff bases with amino acids methionine and histidine has been made. The relationship of the observed Mössbauer parameters and catalytic activity of complexes have been postulated.
Панкратов Д.А., Родионова Л.И., Борисова Н.Е., Смирнов А.В. Диагностика катализаторов на основе биядерных комплексов железа с ациклическими основаниями Шиффа методом мессбауэровской спектроскопии. /XII Международная конференция "Мессбауэровская спектроскопия и ее применения". Суздаль, 06-10 октября 2012. / Сборник материалов, М.:ИМЕТ РАН, 2012, pp. 136
Биядерные комплексы железа различного строения широко применяются как катализаторы окисления в органической химии. В работе синтезированы и изучены, в том числе методом мессбауэровской спектроскопии, новые биядерные комплексы железа с макроциклическими основаниями Шиффа на основе 4-трет-бутил-2,6-диформилфенола и аминокислот метионина и гистидина. Полученные комплексы изучены комплексом физико-химических методов и как катализаторы в реакциях парциального окисления изобутана до третбутилового спирта и разложения третбутилгидропероксида. Показано, что активность и селективность проявляемая комплексами зависят от природы мостиковой группы между двумя ионами железа и не зависят от аминокислотного окружения.
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Synthesis and magnetic properties of cobalt ferrite nanoparticles in polycarbosilane ceramic matrix. Yurkov G.Y., Shashkeev K.A., Kondrashov S.V., Popkov O.V., Shcherbakova G.I., Zhigalov D.V., Pankratov D.A., Ovchenkov E.A., Koksharov Yu.A. //Journal of Alloys and Compounds. 2016. V.686. P.421–430
Composite materials comprised of a ceramic matrix with metal-containing nanoparticles were prepared by sintering a blend of cobalt ferrite nanoparticles and polycarbosilane. Sintering process was performed either in air or argon, resulting in different material composition. The air-sintering materials consist mainly of oxide phases (silica matrix and cobalt ferrite nanoparticles). The process of sintering in argon leads to partial reduction of oxides and formation of α-Fe, carbide and silicate phases. The prepared samples were characterized by the SEM, TEM, XRD and EMR techniques and the Mössbauer spectroscopy. Static magnetic properties were also studied. All samples were found to be soft magnetic. Sintering, especially in argon, increases remnant magnetization of resulting composite products.
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![Equilibrium structure of the binuclear monobridged platinum superoxo complexes [(OH)5Pt(μ-O2)Pt(OH)5]3–](/images/redox-images/articles/2008_rjnc_2.gif "Equilibrium structure of the binuclear monobridged platinum superoxo complexes [(OH)5Pt(μ-O2)Pt(OH)5]3–")
Ab Initio Calculations Of Hydroxoplatinum Compounds: II. Binuclear Platinum(IV) Superoxo Complexes. Pankratov D.A., Dement'ev A.I., Kiselev Yu.M. //Russian Journal of Inorganic Chemistry. 2008. V.53. №2. P.247-253.
The structural and spectral data have been obtained by ab initio methods for the [(OH)4Pt(μ-O2)(μ-OH)Pt(OH)4]2-, [(OH)4Pt(μ-O2)(μ-OH)Pt(OH)4(OH)]3-, [(OH)5Pt(μ-O2)Pt(OH)5]3-, and [(H2O)(OH)4Pt(μ-O2)Pt(OH)4•(H2O)]- clusters, corresponding to binuclear platinum (IV) superoxo complexes with one and two bridges. The data obtained are in good agreement with experimental data and make it possible to judge the structure of available complexes.
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Vibrational spectra of platinum superoxo complexes. Pankratov D.A., Kiselev Yu.M., Sokolov V.B. //Russian Journal of Inorganic Chemistry. 2000. V. 45. № 9. P. 1388-1393
Aqueous alkaline (KOH, KOD) solutions of hexahydroxoplatinate and "blue" superoxohydroxo-platinate complexes were studied by Raman spectroscopy. The spectra of superoxo complexes shows the bands at 1020 and 1060 cm-1 that arise from the O2- moiety. Solid samples of platinum hydroxide and the precipitates isolated from "blue" solutions were studied by IR and Raman spectroscopy. The spectra of hexahydroxoplatinate(IV) were assigned assuming the C3i symmetry of the Pt(OH)62- group. The Raman spectra of the decomposition products of the solid superoxo complex (νO-O = 1080 cm-1 for O2-) show the bands that arise from a platinum peroxo complex (νO-O = 829 cm-1 for O22-).
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