Formation of Silicon-Containing Polyoxoniobates from Hexaniobate Under High Temperature Conditions

P. A. Abramov, A. T. Davletgildeeva, M. N. Sokolov

Результат исследования: Научные публикации в периодических изданияхстатья

4 Цитирования (Scopus)


Hydrothermal reaction of K7H[Nb6O19]·13H2O with Na2SiO3·9H2O (220 °C, 24 h) produces a lacunary siliconiobate [Si4Nb16O56]16−, which was isolated as mixed salt NaK8H6[Na@Si4Nb16O56]·26H2O (1). Changing the silicon source to Ph2Si(OH)2 under the same conditions slightly improves the yield of [Si4Nb16O56]16−, which was isolated as K14H[K@Si4Nb16O56]·26H2O (2). Extending the reaction time leads to rearrangement of [Si4Nb16O56]16− into Keggin-type silicododecaniobate [SiNb12O40]16−, which was isolated and characterized as K8H2(Nb2O2)[SiNb12O40]·20H2O (3). The complexes were characterized by X-ray single crystal analysis, elemental analysis, thermogravimetry, 29Si NMR.

Язык оригиналаанглийский
Страницы (с-по)735-744
Число страниц10
ЖурналJournal of Cluster Science
Номер выпуска2
СостояниеОпубликовано - 1 мар 2017