Nitroprusside-PEO enthalpic interaction as a driving force for partitioning of the [Fe(CN) 5 NO] 2- anion in aqueous two-phase systems formed by poly (ethylene oxide) and sulfate salts

dc.creatorSilva, Luis Henrique M. da
dc.creatorSilva, Maria C. Hespanhol da
dc.creatorAquino, Roney A. N. de
dc.creatorFrancisco, Kelly R.
dc.creatorCardoso, Marcus V. C.
dc.creatorMinim, Luis A.
dc.creatorCoimbra, Jane S. R.
dc.date2017-11-17T11:27:14Z
dc.date2017-11-17T11:27:14Z
dc.date2006-10-25
dc.date.accessioned2023-09-27T20:49:12Z
dc.date.available2023-09-27T20:49:12Z
dc.identifier00027863
dc.identifierhttps://www.ncbi.nlm.nih.gov/pubmed/17107209
dc.identifierhttp://www.locus.ufv.br/handle/123456789/13187
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8948674
dc.descriptionO DOI redireciona para uma pagina de erro.
dc.descriptionIons are known to concentrate in the salt-enriched phase of aqueous two-phase systems, with the only known exception being the pertechnetate anion, TcO(4)(-). We have discovered a second ion, nitroprusside anion (NP), which is markedly transferred from the salt phase to the polymer phase. The partitioning behavior of [Fe(CN)(5)NO](2-) anion was investigated in ATPS formed by poly(ethylene oxide) of molar mass 3350 and 35000 g mol(-1), and different sulfate salts (Na(2)SO(4), Li(2)SO(4), and MgSO(4)). On the basis of a model, the nitroprusside high affinity for the macromolecular phase was attributed to an enthalpic specific interaction between the anion and ethylene oxide unit. Partition coefficients increased exponentially with tie-line length increase, reaching values as high as 1000 and showing a relationship very dependent on the salt nature, but independent of the polymer molar mass.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherAmerican Chemical Society
dc.relation110(46), p. 23540-23546, Nov. 2006
dc.rightsOpen Access
dc.subjectNitroprusside-PEO
dc.subjectEthylene oxide
dc.titleNitroprusside-PEO enthalpic interaction as a driving force for partitioning of the [Fe(CN) 5 NO] 2- anion in aqueous two-phase systems formed by poly (ethylene oxide) and sulfate salts
dc.typeArtigo


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