Chemical reactivity of amino-functionalized mesoporous silica thin films obtained by co-condensation and post-grafting routes

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Amino-functionalized mesoporous hybrid thin films were synthesized by co-condensation and post-grafting routes. These materials were characterized by X-ray photoelectron spectroscopy (XPS), small angle X-ray scattering (SAXS-2D), X-ray reflectometry (XRR) and transmission electron microscopy (TEM)....

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Detalles Bibliográficos
Autor principal: Calvo, A.
Otros Autores: Joselevich, M., Soler-Illia, G.J.A.A, Williams, F.J
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2009
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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030 |a MIMMF 
100 1 |a Calvo, A. 
245 1 0 |a Chemical reactivity of amino-functionalized mesoporous silica thin films obtained by co-condensation and post-grafting routes 
260 |c 2009 
270 1 0 |m Williams, F.J.; Universidad de Buenos Aires, DQIAyQF, FCEN, Ciudad Universitaria, Pabellon II, C1428EHA Buenos Aires, Argentina; email: fwilliams@qi.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a Amino-functionalized mesoporous hybrid thin films were synthesized by co-condensation and post-grafting routes. These materials were characterized by X-ray photoelectron spectroscopy (XPS), small angle X-ray scattering (SAXS-2D), X-ray reflectometry (XRR) and transmission electron microscopy (TEM). The chemical reactivity of the amine functional groups was determined via amidation with trifluoroacetic acid anhydride and characterized with XPS and contact angle measurements. We found that the amidation reaction proceeds successfully in both cases showing that the amine functionalities are available for reaction in the films obtained by both synthesis routes. However we also found that the fraction of amine functionalities available for reaction depends strongly on the functionalization route: ∼37% of amine functional groups are available for reaction in post-grafted films whereas ∼16% of them are available in co-condensed films. This difference can be rationalized in terms of the different nature of the synthesis routes employed as in co-condensed films a fraction of amine functions are contained within the oxide backbone and thus unavailable for reaction. Our findings are important in the designed of functional materials where chemical functionalization might be a crucial step. © 2009 Elsevier Inc. All rights reserved.  |l eng 
593 |a Gerencia de Química, CNEA, Centro Atómico Constituyentes, Av. Gral Paz 1499, San Martín, B1650KNA, Argentina 
593 |a Universidad de Buenos Aires, DQIAyQF, FCEN, Ciudad Universitaria, Pabellon II, C1428EHA Buenos Aires, Argentina 
593 |a Departamento de Química de Superficies y Recubrimientos, TENARIS, Simini 250, Campana, B2804MHA Buenos Aires, Argentina 
690 1 0 |a AMIDATION 
690 1 0 |a AMINO 
690 1 0 |a CHEMICAL REACTION 
690 1 0 |a CO-CONDENSATION 
690 1 0 |a FUNCTIONALIZATION 
690 1 0 |a MESOPOROUS HYBRID THIN FILMS 
690 1 0 |a POST-GRAFTING 
690 1 0 |a AMINATION 
690 1 0 |a AMINES 
690 1 0 |a ANGLE MEASUREMENT 
690 1 0 |a CHEMICAL REACTIVITY 
690 1 0 |a COBALT 
690 1 0 |a CONDENSATION 
690 1 0 |a CONDENSATION REACTIONS 
690 1 0 |a CONTACT ANGLE 
690 1 0 |a FUNCTIONAL GROUPS 
690 1 0 |a FUNCTIONAL MATERIALS 
690 1 0 |a GRAFTING (CHEMICAL) 
690 1 0 |a MESOPOROUS MATERIALS 
690 1 0 |a NEWTONIAN FLOW 
690 1 0 |a OXIDE FILMS 
690 1 0 |a SILICA 
690 1 0 |a SYNTHESIS (CHEMICAL) 
690 1 0 |a THIN FILMS 
690 1 0 |a TRANSMISSION ELECTRON MICROSCOPY 
690 1 0 |a AMIDATION 
690 1 0 |a AMINO 
690 1 0 |a CO-CONDENSATION 
690 1 0 |a FUNCTIONALIZATION 
690 1 0 |a MESOPOROUS HYBRID THIN FILMS 
690 1 0 |a POST-GRAFTING 
690 1 0 |a X RAY PHOTOELECTRON SPECTROSCOPY 
700 1 |a Joselevich, M. 
700 1 |a Soler-Illia, G.J.A.A. 
700 1 |a Williams, F.J. 
773 0 |d 2009  |g v. 121  |h pp. 67-72  |k n. 1-3  |p Microporous Mesoporous Mater.  |x 13871811  |w (AR-BaUEN)CENRE-6111  |t Microporous and Mesoporous Materials 
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856 4 0 |u https://doi.org/10.1016/j.micromeso.2009.01.005  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_13871811_v121_n1-3_p67_Calvo  |y Handle 
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