NMR Studies of Heteropolyanion [P2W20O70(H2O)2]10- Complexes with Metal Cations Full article
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Inorganic Chemistry
ISSN: 0020-1669 , E-ISSN: 1520-510X |
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Output data | Year: 2001, Volume: 40, Number: 6, Pages: 1284-1290 Pages count : 7 DOI: 10.1021/ic000324o | ||
Tags | bismuth; cerium; lithium ion; metal ion; molybdenum; palladium; phosphorus; polyanion; potassium ion; sodium ion; tin; titanium; tungsten; vanadium; zirconium | ||
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Abstract:
We have used multinuclear NMR and IR spectroscopy to study the interaction of a number of metal cations with monovacant heteropolyanion [P2W20O70(H2O)2]10- (P2W20) in aqueous solutions starting from its K salt. We have also prepared and studied P2W20 in an Na-only medium. The observed differences in the NMR spectra of NaP2W20 and KP2W20 solutions and the importance of K+ and Na+ for the formation of P2W20 suggest that this polyanion exists only as a complex with the alkaline cations. When both cations were simultaneously present in solution, we observed the broadening of the NMR signals of P2W20 due to the Na−K exchange. Li+ does not replace K+ or Na+ in such complexes, and in an Li-only medium P2W20 does not form. Of all the Mn+ cations studied (Pd2+, Bi3+, Sn4+, Zr4+, Ce4+, Ti4+, V5+, and Mo6+) only Bi3+, Sn4+, and Ce4+ form complexes with P2W20 in strongly acidic solutions. The 183W and 119Sn NMR data suggest that Sn4+ forms in solution two mutually interconvertable P2W20Sn complexes of the composition P2W20O70(H2O)3SnOH7- and (P2W20O70(H2O)3Sn)2O14- while Bi3+ forms one complex of the proposed composition P2W20O70(H2O)2Bi.7- We obtained complexes with Bi and Sn as free heteropoly acids and studied their thermostability in the solid state.
Cite:
Maksimovskaya R.I.
, Maksimov G.M.
NMR Studies of Heteropolyanion [P2W20O70(H2O)2]10- Complexes with Metal Cations
Inorganic Chemistry. 2001. V.40. N6. P.1284-1290. DOI: 10.1021/ic000324o WOS Scopus РИНЦ
NMR Studies of Heteropolyanion [P2W20O70(H2O)2]10- Complexes with Metal Cations
Inorganic Chemistry. 2001. V.40. N6. P.1284-1290. DOI: 10.1021/ic000324o WOS Scopus РИНЦ
Dates:
Submitted: | Mar 24, 2000 |
Published print: | Mar 1, 2001 |
Identifiers:
Web of science | WOS:000167392600029 |
Scopus | 2-s2.0-0035847870 |
Elibrary | 13369787 |
Chemical Abstracts | 2001:84517 |
Chemical Abstracts (print) | 134:304574 |
OpenAlex | W1982067257 |