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Self-assembly of [PNbxW12−xO40]n− Keggin anions-a simple way to mixed Nb-W polyoxometalates. / Abramov, Pavel A.; Shmakova, Alexandra A.; Haouas, Mohamed et al.

In: New Journal of Chemistry, Vol. 41, No. 1, 2016, p. 256-262.

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

Harvard

Abramov, PA, Shmakova, AA, Haouas, M, Fink, G, Cadot, E & Sokolov, MN 2016, 'Self-assembly of [PNbxW12−xO40]n− Keggin anions-a simple way to mixed Nb-W polyoxometalates', New Journal of Chemistry, vol. 41, no. 1, pp. 256-262. https://doi.org/10.1039/c6nj02637k

APA

Abramov, P. A., Shmakova, A. A., Haouas, M., Fink, G., Cadot, E., & Sokolov, M. N. (2016). Self-assembly of [PNbxW12−xO40]n− Keggin anions-a simple way to mixed Nb-W polyoxometalates. New Journal of Chemistry, 41(1), 256-262. https://doi.org/10.1039/c6nj02637k

Vancouver

Abramov PA, Shmakova AA, Haouas M, Fink G, Cadot E, Sokolov MN. Self-assembly of [PNbxW12−xO40]n− Keggin anions-a simple way to mixed Nb-W polyoxometalates. New Journal of Chemistry. 2016;41(1):256-262. doi: 10.1039/c6nj02637k

Author

Abramov, Pavel A. ; Shmakova, Alexandra A. ; Haouas, Mohamed et al. / Self-assembly of [PNbxW12−xO40]n− Keggin anions-a simple way to mixed Nb-W polyoxometalates. In: New Journal of Chemistry. 2016 ; Vol. 41, No. 1. pp. 256-262.

BibTeX

@article{670135465a6d4e9c97b13428e4f8dfed,
title = "Self-assembly of [PNbxW12−xO40]n− Keggin anions-a simple way to mixed Nb-W polyoxometalates",
abstract = "This paper summarizes preparations of mixed phosphoniobotungstates [PNbxW12−xO40](3+x)− (x = 1-3) in two different ways: (i) incorporation of Nb into pre-existing lacunary phosphotungstates and (ii) self-assembly reactions. A niobium oxalate complex as the source of niobium is used. The reaction products were monitored by 31P and 183W NMR in solution as well as by 31P MAS NMR techniques for precipitated samples. Single-substituted species [PNbW11O40]4− forms rapidly and selectively from lacunary [PW11O39]7− with one equivalent of [NbO(C2O4)2(H2O)2]−. With the increasing amount of the niobium oxalate the highest number of Nb atoms was found to be three per Keggin anion, but the disubstituted [PNb2W10O40]5− was always the preferable product whatever the tungsten reagent was. The reaction products with x = 2 and 3 are present as mixtures of all possible isomers, but the ratio between the individual isomers depends on the synthetic pathway.",
author = "Abramov, {Pavel A.} and Shmakova, {Alexandra A.} and Mohamed Haouas and Gerhard Fink and Emmanuel Cadot and Sokolov, {Maxim N.}",
note = "Funding Information: This work was supported by RFBR (grant number 15-33-20651), LIA FRANCE-RUSSIA No. 1144 CLUSPOM and COST STSM program (COST-STSM-ECOST-STSM-CM1203-101015-062506)",
year = "2016",
doi = "10.1039/c6nj02637k",
language = "English",
volume = "41",
pages = "256--262",
journal = "New Journal of Chemistry",
issn = "1144-0546",
publisher = "ROYAL SOC CHEMISTRY",
number = "1",

}

RIS

TY - JOUR

T1 - Self-assembly of [PNbxW12−xO40]n− Keggin anions-a simple way to mixed Nb-W polyoxometalates

AU - Abramov, Pavel A.

AU - Shmakova, Alexandra A.

AU - Haouas, Mohamed

AU - Fink, Gerhard

AU - Cadot, Emmanuel

AU - Sokolov, Maxim N.

N1 - Funding Information: This work was supported by RFBR (grant number 15-33-20651), LIA FRANCE-RUSSIA No. 1144 CLUSPOM and COST STSM program (COST-STSM-ECOST-STSM-CM1203-101015-062506)

PY - 2016

Y1 - 2016

N2 - This paper summarizes preparations of mixed phosphoniobotungstates [PNbxW12−xO40](3+x)− (x = 1-3) in two different ways: (i) incorporation of Nb into pre-existing lacunary phosphotungstates and (ii) self-assembly reactions. A niobium oxalate complex as the source of niobium is used. The reaction products were monitored by 31P and 183W NMR in solution as well as by 31P MAS NMR techniques for precipitated samples. Single-substituted species [PNbW11O40]4− forms rapidly and selectively from lacunary [PW11O39]7− with one equivalent of [NbO(C2O4)2(H2O)2]−. With the increasing amount of the niobium oxalate the highest number of Nb atoms was found to be three per Keggin anion, but the disubstituted [PNb2W10O40]5− was always the preferable product whatever the tungsten reagent was. The reaction products with x = 2 and 3 are present as mixtures of all possible isomers, but the ratio between the individual isomers depends on the synthetic pathway.

AB - This paper summarizes preparations of mixed phosphoniobotungstates [PNbxW12−xO40](3+x)− (x = 1-3) in two different ways: (i) incorporation of Nb into pre-existing lacunary phosphotungstates and (ii) self-assembly reactions. A niobium oxalate complex as the source of niobium is used. The reaction products were monitored by 31P and 183W NMR in solution as well as by 31P MAS NMR techniques for precipitated samples. Single-substituted species [PNbW11O40]4− forms rapidly and selectively from lacunary [PW11O39]7− with one equivalent of [NbO(C2O4)2(H2O)2]−. With the increasing amount of the niobium oxalate the highest number of Nb atoms was found to be three per Keggin anion, but the disubstituted [PNb2W10O40]5− was always the preferable product whatever the tungsten reagent was. The reaction products with x = 2 and 3 are present as mixtures of all possible isomers, but the ratio between the individual isomers depends on the synthetic pathway.

UR - http://www.scopus.com/inward/record.url?scp=85007206712&partnerID=8YFLogxK

U2 - 10.1039/c6nj02637k

DO - 10.1039/c6nj02637k

M3 - Article

AN - SCOPUS:85007206712

VL - 41

SP - 256

EP - 262

JO - New Journal of Chemistry

JF - New Journal of Chemistry

SN - 1144-0546

IS - 1

ER -

ID: 26152846