Mostrar el registro sencillo del ítem
dc.contributor.author
Clop, Eduardo Matias
dc.contributor.author
Perillo, Maria Angelica
dc.contributor.author
Chattah, Ana Karina
dc.date.available
2018-04-18T15:05:27Z
dc.date.issued
2012-09-07
dc.identifier.citation
Clop, Eduardo Matias; Perillo, Maria Angelica; Chattah, Ana Karina; 1H and 2H NMR spin–lattice relaxation probing water: PEG molecular dynamics in solution; American Chemical Society; Journal of Physical Chemistry B; 116; 39; 7-9-2012; 11953-11958
dc.identifier.issn
1520-6106
dc.identifier.uri
http://hdl.handle.net/11336/42449
dc.description.abstract
Nuclear magnetic resonance spin–lattice relaxation times (T1) measurements were performed in aqueous solutions of poly(ethylene glycol) (PEG) of 6000 Da molecular mass to study the dynamical relation between PEG and water molecules at different solute concentrations. 1H–T1 experiments were carried on at a low magnetic field in the time domain (20 MHz) and at a high field (400 MHz) to obtain spectral resolution. Two contributing components were identified in each proton system, PEG and water, presenting values of T1 with very different orders of magnitude. The approximate matching between the shorter 1H–T1 values associated with water and PEG has lead us to conclude that there exists a network of interactions (hydrogen bonds) between the solute and the solvent, which results in the presence of an ordered and dehydrated structure of PEG folded or self-assembled in equilibrium with a more flexible monomer structure. Dynamic light scattering results were consistent with the formation of PEG aggregates, showing a mean size between 40 and 100 nm.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Relaxation Times
dc.subject
Peg Aggregation
dc.subject
Dynamic Light Scattering
dc.subject
Water Dynamics
dc.subject.classification
Otras Ciencias Químicas
dc.subject.classification
Ciencias Químicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
1H and 2H NMR spin–lattice relaxation probing water: PEG molecular dynamics in solution
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-10T14:04:44Z
dc.identifier.eissn
1520-5207
dc.journal.volume
116
dc.journal.number
39
dc.journal.pagination
11953-11958
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Washington
dc.description.fil
Fil: Clop, Eduardo Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
dc.description.fil
Fil: Perillo, Maria Angelica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
dc.description.fil
Fil: Chattah, Ana Karina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
dc.journal.title
Journal of Physical Chemistry B
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp304569a
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/jp304569a
Archivos asociados