Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/45038
DC FieldValueLanguage
dc.contributor.authorAureliano, Manuel-
dc.contributor.authorOhlin, C André-
dc.contributor.authorVieira, Michele O-
dc.contributor.authorMarques, M Paula M-
dc.contributor.authorCasey, William H-
dc.contributor.authorBatista de Carvalho, Luís A E-
dc.date.accessioned2017-12-15T16:09:40Z-
dc.date.available2017-12-15T16:09:40Z-
dc.date.issued2016-01-01-
dc.identifier10.1039/c5dt04176g-
dc.identifier.urihttp://hdl.handle.net/10316/45038-
dc.description.abstractThe decaniobate ion, (Nb10 = [Nb10O28](6-)) being isoelectronic and isostructural with the decavanadate ion (V10 = [V10O28](6-)), but chemically and electrochemically more inert, has been useful in advancing the understanding of V10 toxicology and pharmacological activities. In the present study, the solution chemistry of Nb10 and V10 between pH 4 and 12 is studied by Raman spectroscopy. The Raman spectra of V10 show that this vanadate species dominates up to pH 6.45 whereas it remains detectable until pH 8.59, which is an important range for biochemistry. Similarly, Nb10 is present between pH 5.49 and 9.90 and this species remains detectable in solution up to pH 10.80. V10 dissociates at most pH values into smaller tetrahedral vanadate oligomers such as V1 and V2, whereas Nb10 dissociates into Nb6 under mildly (10 > pH > 7.6) or highly alkaline conditions. Solutions of V10 and Nb10 are both kinetically stable under basic pH conditions for at least two weeks and at moderate temperature. The Raman method provides a means of establishing speciation in the difficult niobate system and these findings have important consequences for toxicology activities and pharmacological applications of vanadate and niobate polyoxometalates.por
dc.language.isoengpor
dc.rightsopenAccesspor
dc.titleCharacterization of decavanadate and decaniobate solutions by Raman spectroscopypor
dc.typearticle-
degois.publication.firstPage7391-9por
degois.publication.issue17por
degois.publication.titleDalton transactions (Cambridge, England : 2003)por
dc.peerreviewedyespor
dc.identifier.doi10.1039/C5DT04176Gpor
degois.publication.volume45por
item.fulltextCom Texto completo-
item.languageiso639-1en-
item.grantfulltextopen-
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais
Files in This Item:
File Description SizeFormat
Dalton_16.pdf2.01 MBAdobe PDFView/Open
Show simple item record

SCOPUSTM   
Citations

28
checked on May 29, 2020

WEB OF SCIENCETM
Citations

27
checked on May 29, 2020

Page view(s)

204
checked on Jul 8, 2020

Download(s)

117
checked on Jul 8, 2020

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.