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

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

doi:10.1007/s10876-016-1121-9

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

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

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	735-744
Number of pages	10
Journal	Journal of Cluster Science
Volume	28
Issue number	2
DOIs	https://doi.org/10.1007/s10876-016-1121-9
Publication status	Published - 1 Mar 2017

Keywords

Hydrothermal reactions
Polyoxoniobate
Silicon
X-ray structure
PHOTOCATALYTIC PROPERTIES
COMPLEX
CLUSTERS
STRUCTURAL-CHARACTERIZATION
COORDINATION
HETEROPOLYNIOBATES
CATIONS

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title = "Formation of Silicon-Containing Polyoxoniobates from Hexaniobate Under High Temperature Conditions",

abstract = "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.",

keywords = "Hydrothermal reactions, Polyoxoniobate, Silicon, X-ray structure, PHOTOCATALYTIC PROPERTIES, COMPLEX, CLUSTERS, STRUCTURAL-CHARACTERIZATION, COORDINATION, HETEROPOLYNIOBATES, CATIONS",

author = "Abramov, {P. A.} and Davletgildeeva, {A. T.} and Sokolov, {M. N.}",

year = "2017",

month = mar,

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doi = "10.1007/s10876-016-1121-9",

language = "English",

volume = "28",

pages = "735--744",

journal = "Journal of Cluster Science",

issn = "1040-7278",

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T1 - Formation of Silicon-Containing Polyoxoniobates from Hexaniobate Under High Temperature Conditions

AU - Abramov, P. A.

AU - Davletgildeeva, A. T.

AU - Sokolov, M. N.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - 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.

AB - 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.

KW - Hydrothermal reactions

KW - Polyoxoniobate

KW - Silicon

KW - X-ray structure

KW - PHOTOCATALYTIC PROPERTIES

KW - COMPLEX

KW - CLUSTERS

KW - STRUCTURAL-CHARACTERIZATION

KW - COORDINATION

KW - HETEROPOLYNIOBATES

KW - CATIONS

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U2 - 10.1007/s10876-016-1121-9

DO - 10.1007/s10876-016-1121-9

M3 - Article

AN - SCOPUS:84997078056

VL - 28

SP - 735

EP - 744

JO - Journal of Cluster Science

JF - Journal of Cluster Science

SN - 1040-7278

IS - 2

ER -

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

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