Publication
UV-Vis spectroscopic study preferential solvation and intermolecular interactions in methanol/1-propanol/acetonitrile by means of solvatochromic probes
| dc.contributor.author | Nunes, Nelson Alberto Frade da Silva | |
| dc.contributor.author | Elvas Leitao, Ruben | |
| dc.contributor.author | Martins, Filomena | |
| dc.date.accessioned | 2015-08-24T14:49:29Z | |
| dc.date.available | 2015-08-24T14:49:29Z | |
| dc.date.issued | 2014-04-24 | |
| dc.description.abstract | Solvatochromic UV-Vis shifts of four indicators (4-nitroaniline, 4-nitroanisole, 4-nitrophenol and N,N-dimethy-1-4-nitro aniline) have been measured at 298.15 K in the ternary mixture methano1/1-propanol/acetonitrile (MeOH/1-PrOH/MeCN) in a total of 22 mole fractions, along with 18 additional mole fractions for each of the corresponding binary mixtures, MeOH/1-PrOH, 1-PrOH/MeCN and MeOH/MeCN. These values, combined with our previous experimental results for 2,6-dipheny1-4-(2,4,6-triphenylpyridinium-1-yl)phenolate (Reichardt's betaine dye) in the same mixtures, permitted the computation of the Kamlet-Taft solvent parameters, alpha, beta, and pi*. The rationalization of the spectroscopic behavior of each probe within each mixture's whole mole fraction range was achieved through the use of the Bosch and Roses preferential solvation model. The applied model allowed the identification of synergistic behaviors in MeCN/alcohol mixtures and thus to infer the existence of solvent complexes in solution. Also, the addition of small amounts of MeCN to the binary mixtures was seen to cause a significant variation in pi*, whereas the addition of alcohol to MeCN mixtures always lead to a sudden change in a and The behavior of these parameters in the ternary mixture was shown to be mainly determined by the contributions of the underlying binary mixtures. (C) 2014 Elsevier B.V. All rights reserved. | por |
| dc.identifier.citation | NUNES, Nelson Alberto Frade da Silva; LEITÃO, Ruben Anacoreta de Seabra Elvas; MARTINS, Filomena – UV-Vis spectroscopic study preferential solvation and intermolecular interactions in Methanol/1-Propanol/Acetonitrile by means of solvatochromic probes. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy. ISSN: 1386-1425. Vol. 124 (2014), pp. 470-479 | por |
| dc.identifier.doi | 10.1016/j.saa.2014.01.021 | |
| dc.identifier.issn | 1386-1425 | |
| dc.identifier.uri | http://hdl.handle.net/10400.21/4969 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Pergamon-Elsevier Science LTD | por |
| dc.relation.publisherversion | http://www.ncbi.nlm.nih.gov/pubmed/24508885 | |
| dc.subject | Solvatochromic Probes | por |
| dc.subject | Kamlet-Taft Parameters | por |
| dc.subject | Solvent Exchange Model | por |
| dc.subject | Preferential Solvation | por |
| dc.subject | Ternary Mixture | por |
| dc.title | UV-Vis spectroscopic study preferential solvation and intermolecular interactions in methanol/1-propanol/acetonitrile by means of solvatochromic probes | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 479 | por |
| oaire.citation.startPage | 470 | por |
| oaire.citation.title | Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy | por |
| oaire.citation.volume | 124 | por |
| person.familyName | Elvas Leitao | |
| person.givenName | Ruben | |
| person.identifier.ciencia-id | F41B-8A26-88D4 | |
| person.identifier.orcid | 0000-0002-2196-412X | |
| person.identifier.rid | D-2452-2009 | |
| person.identifier.scopus-author-id | 55667178200 | |
| rcaap.rights | closedAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 440b7129-d4d9-4225-a936-ca694c0984b6 | |
| relation.isAuthorOfPublication.latestForDiscovery | 440b7129-d4d9-4225-a936-ca694c0984b6 |