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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  
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HYDROPHOBIC INTERACTION  
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METAL COMPLEX  
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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