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dc.contributor.author
Escobar, Ane
dc.contributor.author
Yate, Luis
dc.contributor.author
Grzelczak, Marek
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Amenitsch, Heinz
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Moya, Sergio E.
dc.contributor.author
Bordoni, Andrea Veronica
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dc.contributor.author
Angelome, Paula Cecilia
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dc.date.available
2022-11-22T15:58:08Z
dc.date.issued
2017-08
dc.identifier.citation
Escobar, Ane; Yate, Luis; Grzelczak, Marek; Amenitsch, Heinz; Moya, Sergio E.; et al.; One step synthesis of mesoporous silica thin films containing available COOH groups; American Chemical Society; ACS Omega; 2; 8; 8-2017; 4548-4555
dc.identifier.issn
2470-1343
dc.identifier.uri
http://hdl.handle.net/11336/178561
dc.description.abstract
Inorganic-organic hybrid mesoporous silica thin films with covalently bonded carboxylic acid groups were synthesized in a one-step procedure, using carboxylic-derivatized alkoxysilanes obtained by photochemical radical thiol-ene addition (PRTEA). The organosilanes were synthesized by clicking mercaptosuccinic or mercaptoacetic thioacids with vinyltrimethoxysilane, using benzophenone as the photoradical initiator. The films were synthesized by evaporation-induced self-assembly of a sol containing a mixture of tetraethoxysilane and different quantities of the organosilanes, without any further treatment after the PRTEA reaction. Two nonionic surfactants were used as templates to produce different pore sizes. Different aging times were also applied. Structural characterization with electron microscopy, porosimetry measurements, and small angle X-ray scattering with two-dimensional detection demonstrated the obtention of mesoporous phases whose degree of ordering depended on the amount of added organosilane. The incorporation of the functional silanes was shown by X-ray photoelectron spectroscopy, and the presence of the COOH groups was confirmed by Fourier transform infrared (FTIR). Finally, the availability of the COOH groups for further chemical modification was demonstrated by FTIR by following the changes in the typical carbonyl IR bands during proton exchange and metal complexation. The proposed simple methodology allows obtaining COOH-modified silica thin films in one step, without the need of hard reaction conditions or deprotection steps. Functionalization with carboxyl groups brings a pH-dependent switch-ability to the pore surface that can be used for multifunctional mesoporous materials design.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MESOSPOROUS SILICA
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THIN FILMS
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HYBRID OXIDES
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CARBOXYLIC
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THIOL-ENE CLICK
dc.subject.classification
Otras Ciencias Químicas
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
One step synthesis of mesoporous silica thin films containing available COOH groups
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-11-22T09:14:45Z
dc.journal.volume
2
dc.journal.number
8
dc.journal.pagination
4548-4555
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Escobar, Ane. No especifíca;
dc.description.fil
Fil: Yate, Luis. No especifíca;
dc.description.fil
Fil: Grzelczak, Marek. No especifíca;
dc.description.fil
Fil: Amenitsch, Heinz. No especifíca;
dc.description.fil
Fil: Moya, Sergio E.. No especifíca;
dc.description.fil
Fil: Bordoni, Andrea Veronica. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Angelome, Paula Cecilia. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
ACS Omega
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/acsomega.7b00560
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/acsomega.7b00560
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