Tubular polyoxoanion [(SeMo6O21)2(C2O4)3]10−and its transformations

Valeria S. Pantyukhina, Victoria V. Volchek, Vladislav Yu Komarov, Ilya V. Korolkov, Vasily V. Kokovkin, Nikolay B. Kompankov, Pavel A. Abramov, Maxim N. Sokolov

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

Self-assembly reactions in the Na2MoO4/SeO2/H2C2O4system lead to the formation of a tubular [(SeMo6O21)2(C2O4)3]10−hybrid polyanion, isolated and characterized by single crystal X-ray diffraction (SCXRD) as Na9H[(SeMo6O21)2(C2O4)3]·NaNO3·20.6H2O (SeMo6-1). Dehydration of this compound leads to the formation of Na10[(SeMo6O21)2(C2O4)3]·0.5NaNO3·8H2O (SeMo6-2). The electrochemical behavior ofSeMo6-2as a component of the paste electrode was studied by CV in CH3CN solution. A concentrated aqueous solution ofSeMo6-2was studied using77Se and95Mo NMR techniques, which show extensive degradation of the complex. Addition of TBABr to the concentrated solution leads to a precipitate consisting of TBA salts of [Mo6O19]2−and [β-Mo8O26Na2(NO3)2]2−anions. The latter was characterized by SCXRD as (TBA)3[β-Mo8O26Na2(NO3)]·CH3CN (Mo8-Na). This transformation shows the presence of [β-Mo8O26]4−and [Mo6O19]2−in the aqueous solution ofSeMo6-2. The study of (NBu4)4[β-Mo8O26] and (NBu4)2[Mo6O19] solutions in CH3CN by HPLC shows equilibration between [β-Mo8O26]4−and [Mo6O19]2−

Язык оригиналаанглийский
Страницы (с-по)6745-6752
Число страниц8
ЖурналNew Journal of Chemistry
Том45
Номер выпуска15
DOI
СостояниеОпубликовано - 21 апр 2021

Предметные области OECD FOS+WOS

  • 2.05 ТЕХНОЛОГИЯ МАТЕРИАЛОВ
  • 2.04 ХИМИЧЕСКИЕ ТЕХНОЛОГИИ
  • 1.04 ХИМИЧЕСКИЕ НАУКИ

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