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Combined HPLC-ICP-AES technique as an informative tool for the study of heteropolyniobates. / Abramov, Pavel A.; Romanova, Tamara E.; Volchek, Victoria V. et al.

In: New Journal of Chemistry, Vol. 42, No. 10, 21.05.2018, p. 7949-7955.

Research output: Contribution to journalArticlepeer-review

Harvard

Abramov, PA, Romanova, TE, Volchek, VV, Mukhacheva, AA, Kompankov, NB & Sokolov, MN 2018, 'Combined HPLC-ICP-AES technique as an informative tool for the study of heteropolyniobates', New Journal of Chemistry, vol. 42, no. 10, pp. 7949-7955. https://doi.org/10.1039/c7nj03917d

APA

Abramov, P. A., Romanova, T. E., Volchek, V. V., Mukhacheva, A. A., Kompankov, N. B., & Sokolov, M. N. (2018). Combined HPLC-ICP-AES technique as an informative tool for the study of heteropolyniobates. New Journal of Chemistry, 42(10), 7949-7955. https://doi.org/10.1039/c7nj03917d

Vancouver

Abramov PA, Romanova TE, Volchek VV, Mukhacheva AA, Kompankov NB, Sokolov MN. Combined HPLC-ICP-AES technique as an informative tool for the study of heteropolyniobates. New Journal of Chemistry. 2018 May 21;42(10):7949-7955. doi: 10.1039/c7nj03917d

Author

Abramov, Pavel A. ; Romanova, Tamara E. ; Volchek, Victoria V. et al. / Combined HPLC-ICP-AES technique as an informative tool for the study of heteropolyniobates. In: New Journal of Chemistry. 2018 ; Vol. 42, No. 10. pp. 7949-7955.

BibTeX

@article{c503b00be8454a4aab7ed1a9d39f79b6,
title = "Combined HPLC-ICP-AES technique as an informative tool for the study of heteropolyniobates",
abstract = "The combined HPLC-ICP-AES technique was applied to study formation of tungstoniobates and phosphomolybdoniobates. Reaction of potassium hexaniobate with tungstic acid results in the formation of mixed Nb/W Lindqvist hexametalates. The metal ratio depends on the relative amount of H2WO4 and reaction time. The most favored species are [Nb4W2O19]6- and [Nb3W3O19]5- which equilibrate with hexaniobate. Formation of [Nb2W4O19]4- was also observed; its share gradually increases with increasing amount of tungstic acid and decreasing pH. Reaction of tungstic acid with telluropentaniobate [TeNb5O19]7- results only in substitution of W for Te producing the same mixed Nb/W Lindqvist anions, but with different distribution of the individual species. The reaction of phosphomolybdic acid (H3PMo12O40) with a niobium oxalate complex, [NbO(C2O4)2(H2O)2]-, leads to the formation of mixed P/Nb/Mo Keggin anions, unambiguously detected for the first time. Only [PMo11NbO40]4- and [PMo10Nb2O40]5- were observed over the whole concentration range. No trisubstituted [PMo9Nb3O40]6- was detected in the substitution reaction, but is accessible from the self-assembly reaction of the niobium oxalate complex, phosphoric acid, and molybdate.",
keywords = "INDUCTIVELY-COUPLED PLASMA, CAPILLARY-ELECTROPHORESIS, MASS-SPECTROMETRY, PHOTOCATALYTIC PROPERTIES, EMISSION-SPECTROMETRY, LIQUID-CHROMATOGRAPHY, AQUEOUS-SOLUTIONS, COMPLEXES, CLUSTERS, IONS",
author = "Abramov, {Pavel A.} and Romanova, {Tamara E.} and Volchek, {Victoria V.} and Mukhacheva, {Anna A.} and Kompankov, {Nikolay B.} and Sokolov, {Maxim N.}",
note = "Publisher Copyright: {\textcopyright} 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.",
year = "2018",
month = may,
day = "21",
doi = "10.1039/c7nj03917d",
language = "English",
volume = "42",
pages = "7949--7955",
journal = "New Journal of Chemistry",
issn = "1144-0546",
publisher = "ROYAL SOC CHEMISTRY",
number = "10",

}

RIS

TY - JOUR

T1 - Combined HPLC-ICP-AES technique as an informative tool for the study of heteropolyniobates

AU - Abramov, Pavel A.

AU - Romanova, Tamara E.

AU - Volchek, Victoria V.

AU - Mukhacheva, Anna A.

AU - Kompankov, Nikolay B.

AU - Sokolov, Maxim N.

N1 - Publisher Copyright: © 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

PY - 2018/5/21

Y1 - 2018/5/21

N2 - The combined HPLC-ICP-AES technique was applied to study formation of tungstoniobates and phosphomolybdoniobates. Reaction of potassium hexaniobate with tungstic acid results in the formation of mixed Nb/W Lindqvist hexametalates. The metal ratio depends on the relative amount of H2WO4 and reaction time. The most favored species are [Nb4W2O19]6- and [Nb3W3O19]5- which equilibrate with hexaniobate. Formation of [Nb2W4O19]4- was also observed; its share gradually increases with increasing amount of tungstic acid and decreasing pH. Reaction of tungstic acid with telluropentaniobate [TeNb5O19]7- results only in substitution of W for Te producing the same mixed Nb/W Lindqvist anions, but with different distribution of the individual species. The reaction of phosphomolybdic acid (H3PMo12O40) with a niobium oxalate complex, [NbO(C2O4)2(H2O)2]-, leads to the formation of mixed P/Nb/Mo Keggin anions, unambiguously detected for the first time. Only [PMo11NbO40]4- and [PMo10Nb2O40]5- were observed over the whole concentration range. No trisubstituted [PMo9Nb3O40]6- was detected in the substitution reaction, but is accessible from the self-assembly reaction of the niobium oxalate complex, phosphoric acid, and molybdate.

AB - The combined HPLC-ICP-AES technique was applied to study formation of tungstoniobates and phosphomolybdoniobates. Reaction of potassium hexaniobate with tungstic acid results in the formation of mixed Nb/W Lindqvist hexametalates. The metal ratio depends on the relative amount of H2WO4 and reaction time. The most favored species are [Nb4W2O19]6- and [Nb3W3O19]5- which equilibrate with hexaniobate. Formation of [Nb2W4O19]4- was also observed; its share gradually increases with increasing amount of tungstic acid and decreasing pH. Reaction of tungstic acid with telluropentaniobate [TeNb5O19]7- results only in substitution of W for Te producing the same mixed Nb/W Lindqvist anions, but with different distribution of the individual species. The reaction of phosphomolybdic acid (H3PMo12O40) with a niobium oxalate complex, [NbO(C2O4)2(H2O)2]-, leads to the formation of mixed P/Nb/Mo Keggin anions, unambiguously detected for the first time. Only [PMo11NbO40]4- and [PMo10Nb2O40]5- were observed over the whole concentration range. No trisubstituted [PMo9Nb3O40]6- was detected in the substitution reaction, but is accessible from the self-assembly reaction of the niobium oxalate complex, phosphoric acid, and molybdate.

KW - INDUCTIVELY-COUPLED PLASMA

KW - CAPILLARY-ELECTROPHORESIS

KW - MASS-SPECTROMETRY

KW - PHOTOCATALYTIC PROPERTIES

KW - EMISSION-SPECTROMETRY

KW - LIQUID-CHROMATOGRAPHY

KW - AQUEOUS-SOLUTIONS

KW - COMPLEXES

KW - CLUSTERS

KW - IONS

UR - http://www.scopus.com/inward/record.url?scp=85047097264&partnerID=8YFLogxK

U2 - 10.1039/c7nj03917d

DO - 10.1039/c7nj03917d

M3 - Article

AN - SCOPUS:85047097264

VL - 42

SP - 7949

EP - 7955

JO - New Journal of Chemistry

JF - New Journal of Chemistry

SN - 1144-0546

IS - 10

ER -

ID: 13468687