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Polyoxometalate Speciation — Ionic Medium Dependence and Complexation to Medium Ions
Umeå University, Faculty of Science and Technology, Chemistry.
2002 (English)In: Polyoxometalate Chemistry for Nano-Composite Design, Springer US , 2002, 139-47 p.Chapter in book (Other academic)
Abstract [en]

We have from our study on pyrovanadate equilibria in the pH range 10.8 – 12 at 25ºC found that the medium dependence in Na(Cl), TBA(Cl), and Na,TBA(Cl) media can be explained with medium cation complexation to the vanadate species. Although vast medium concentration ranges have been covered, no Debye-Hückel parameters have to be used. Moreover, since Na+, TBA+ and medium independent equilibrium constants have been determined, the pyrovanadate system can be modeled at any Vtot, [Na+], and [TBA+]. An analogous study on the H+ - HVO42− system in the pH range 7 – 12 is in progress and it seems that medium cation complexes can explain all EMF/NMR data.

Place, publisher, year, edition, pages
Springer US , 2002. 139-47 p.
URN: urn:nbn:se:umu:diva-9052DOI: doi:10.1007/0-306-47933-8_11ISBN: 978-0-306-47359-3 (Print) 978-0-306-47933-5 (Online)OAI: diva2:148723
Available from: 2008-02-28 Created: 2008-02-28Bibliographically approved

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