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dc.contributor.author
Molina, María Alejandra
dc.contributor.author
Rivarola, Claudia Rosana
dc.contributor.author
Barbero, César Alfredo
dc.date.available
2021-05-05T12:14:32Z
dc.date.issued
2010-01
dc.identifier.citation
Molina, María Alejandra; Rivarola, Claudia Rosana; Barbero, César Alfredo; Evidence of hydrophobic interactions controlling mobile ions release from smart hydrogels; Taylor & Francis Ltd; Molecular Crystals and Liquid Crystals - (Print); 521; 1-2010; 265-271
dc.identifier.issn
1563-5287
dc.identifier.uri
http://hdl.handle.net/11336/131347
dc.description.abstract
A water soluble cationic metal complex (tris(2,2'-bipyridine)ruthenium(II)) can be loaded into hydrogels containing acrylamide and/or acrylic acid units. The cationic complex is retained in polymer containing acrylic acid units at high pH and released at low pH. This is likely due to electrostatic interactions of the cation with the carboxylate anions, present at high pH, which are converted into neutral carboxylic acid at low pH, releasing the metal complex. Since the gel contract at low pH, the water soluble cation is also released with the water expelled from the gel. However, a strong retention of the cation inside the gels is observed when acrylamide units are present. A possible explanation is a hydrophobic interaction of the large metal complex with the polyacrylamide network. Using the counteracting electrostatic and hydrophobic interactions of probe molecules with smart hydrogel matrixes it is possible to tune the pH of maximum release away from the pKa of the ionizable group.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Taylor & Francis Ltd
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CATIONIC COMPLEX
dc.subject
HYDROGELS
dc.subject
HYDROPHOBIC INTERACTION
dc.subject
METAL COMPLEX
dc.subject
POLYACRYLAMIDE NETWORK
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Evidence of hydrophobic interactions controlling mobile ions release from smart hydrogels
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-04-09T16:18:24Z
dc.identifier.eissn
1542-1406
dc.journal.volume
521
dc.journal.pagination
265-271
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Molina, María Alejandra. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.description.fil
Fil: Rivarola, Claudia Rosana. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.description.fil
Fil: Barbero, César Alfredo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.journal.title
Molecular Crystals and Liquid Crystals - (Print)
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1080/15421401003722732
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1080/15421401003722732
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