Zobrazeno 1 - 10
of 52
pro vyhledávání: '"R. I. Maksimovskaya"'
Autor:
M. S. Valova, R. I. Maksimovskaya, O. V. Koryakova, I. N. Ganebnykh, N. I. Medvedeva, L. D. Kurbatova
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 193:382-386
Extraction of vanadium(V) with the phenol-type tertiary amine N-(2-hydroxy-5-nonylbenzyl)-β,β-dihydroxyethylamine (NBEA) has been examined. The optimal extraction conditions have been determined. I...
Publikováno v:
Kinetics and Catalysis. 54:420-430
The homogeneous oxidation of 1,3-butadiene (BD) in H2O2-HPC-CH3CN (HPC = heteropoly compound) solutions has been investigated. The route of the reaction depends on the nature of the metal capable of coordinating with active oxygen in the HPC. The pro
Autor:
Vladimir I. Zaikovskii, V. G. Vasil’ev, R. I. Maksimovskaya, M. A. Fedotov, Oxana A. Kholdeeva, S. S. Arzumanov, G. M. Maksimov
Publikováno v:
Journal of Structural Chemistry. 50:618-627
Heteropoly acid (HPA) H8(PW11TiO39)2O·xH2O (I) is synthesized by three different ways and studied by chemical analysis, potentiometric titration, mass-spectrometry, IR, 31P, 183W, and 17O NMR spectroscopy, thermogravimetry, and transmission electron
Publikováno v:
Applied Catalysis A: General. 342:126-130
A new practically wasteless method of synthesis of high-vanadium Mo–V–phosphoric heteropoly acids aqueous solutions having modified composition H a P z M o y V x ′ O b ( HPA- x ′ z P ) has been developed. These solutions are used as thermally
Autor:
R. I. Maksimovskaya, M. A. Fedotov
Publikováno v:
Journal of Structural Chemistry. 47:952-978
The results of structural investigations of vanadium, molybdenum, and tungsten polyoxoanions (PA) by 17O, 51V, 95Mo, 183W, and heteroatom NMR are generalized in this review. NMR spectroscopy possibilities to determine the structure of PA are discusse
Autor:
R. I. Maksimovskaya, Elena B. Burgina, T. V. Andrushkevich, Galina I. Aleshina, Larisa S. Dovlitova, Valentina M. Bondareva, Plyasova Lyudmila M
Publikováno v:
Reaction Kinetics and Catalysis Letters. 88:183-191
Genesis of an active component in V-Mo-Nb-O catalysts for the oxidation and ammoxidation of ethane was studied. It was shown that the mixing of aqueous solutions of initial reactants leads to the formation of MoV complexes in the solution and to sedi
Publikováno v:
Russian Chemical Bulletin. 52:103-108
According to the 31P NMR spectroscopy, heteropolyacid (HPA) H6P2Mo18O62·nH2O (P2Mo18), α-isomer of the Dawson structure, transforms upon heating above 80 °C partially (up to 30%) to γ-isomer, in which both polar groups Mo3O13 of the heteropolyani
Publikováno v:
Inorganic Materials. 39:687-693
A method is proposed for the synthesis of heteropoly acids from oxides of molybdenum, tungsten, and vanadium via mechanochemical activation. The fundamental principles of this approach to the synthesis of heteropoly acids containing different ligands
Publikováno v:
Russian Chemical Bulletin. 50:587-590
The acidity on the “proton affinity” scale was determined by IR spectroscopy of the pyridinium salts for nineteen heteropoly acids of nine structural types (including two with the previously unknown structure) and one isopoly acid. All heteropoly
Autor:
Elena B. Burgina, Marina V. Chaikina, Yu. V. Frolova, Vladimir I. Zaikovskii, S. V. Tsybulya, N. N. Kuznetsova, D. I. Kochubei, R. I. Maksimovskaya, Vladimir V. Kriventsov, Dinesh K. Agrawal, Eugenii A. Paukshtis, G. S. Litvak, Vladislav A. Sadykov, Rustum Roy, V. V. Lunin, V. N. Kolomiichuk, Svetlana N. Pavlova, G. V. Zabolotnaya
Publikováno v:
Kinetics and Catalysis. 42:390-398
Results of the systematic study of the synthesis of highly dispersed framework zirconium phosphates stabilized by ammonium, lanthanum, aluminum, manganese, and cobalt cations are summarized. The synthesis involves the mechanochemical activation of a