Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior

A first study of the behavior of amino functions in mesoporous hybrid thin films M1-x(Si-(CH2)3NH2) xO2-x/2 (M = Si, Ti, Zr; 0.05 ≤ x ≤ 0.2) with accessible Im3̄m- or Fm3̄m-derived pore mesostructures is presented. An XPS study of surface nitrogen species shows two different sites corresponding to a...

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Autores principales:	Angelomé, Paula C., Sánchez, Verónica Muriel, Williams, Federico Jose, Soler Illia, Galo Juan de Avila Arturo
Publicado:	2008
Materias:	Amines Thin films Aminopropyl Functionalized Hybrid thin films Mesoporous Thick films
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v20_n14_p4661_Calvo http://hdl.handle.net/20.500.12110/paper_08974756_v20_n14_p4661_Calvo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_08974756_v20_n14_p4661_Calvo
record_format	dspace
spelling	paper:paper_08974756_v20_n14_p4661_Calvo2023-06-08T15:49:17Z Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior Angelomé, Paula C. Sánchez, Verónica Muriel Williams, Federico Jose Soler Illia, Galo Juan de Avila Arturo Amines Thin films Aminopropyl Functionalized Hybrid thin films Mesoporous Thick films A first study of the behavior of amino functions in mesoporous hybrid thin films M1-x(Si-(CH2)3NH2) xO2-x/2 (M = Si, Ti, Zr; 0.05 ≤ x ≤ 0.2) with accessible Im3̄m- or Fm3̄m-derived pore mesostructures is presented. An XPS study of surface nitrogen species shows two different sites corresponding to amino and ammonium groups. The ratio of these species changes with pH and is related to the nature of M, suggesting that the interaction between the organic functions and the surface M-OH groups can be tailored to tune the surface acid-base behavior. Density functional theory (DFT) calculations were used to rationalize the XPS observations showing that -NH3 + functions irreversibly transfer a proton to neighboring M-O- surface groups. The acid-base surface properties can be further modified by adding a phosphonate "capping" on the M surface sites. Our findings have a series of interesting implications in surface functionalization: attachment of biomolecules to surfaces, design of perm-selective or philicity-selective membranes, or design of catalysts that show a well-defined organic reactive function near surface hydroxyl groups. © 2008 American Chemical Society. Fil:Angelomé, P.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sánchez, V.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Williams, F.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Soler-Illia, G.J.A.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v20_n14_p4661_Calvo http://hdl.handle.net/20.500.12110/paper_08974756_v20_n14_p4661_Calvo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Amines Thin films Aminopropyl Functionalized Hybrid thin films Mesoporous Thick films
spellingShingle	Amines Thin films Aminopropyl Functionalized Hybrid thin films Mesoporous Thick films Angelomé, Paula C. Sánchez, Verónica Muriel Williams, Federico Jose Soler Illia, Galo Juan de Avila Arturo Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior
topic_facet	Amines Thin films Aminopropyl Functionalized Hybrid thin films Mesoporous Thick films
description	A first study of the behavior of amino functions in mesoporous hybrid thin films M1-x(Si-(CH2)3NH2) xO2-x/2 (M = Si, Ti, Zr; 0.05 ≤ x ≤ 0.2) with accessible Im3̄m- or Fm3̄m-derived pore mesostructures is presented. An XPS study of surface nitrogen species shows two different sites corresponding to amino and ammonium groups. The ratio of these species changes with pH and is related to the nature of M, suggesting that the interaction between the organic functions and the surface M-OH groups can be tailored to tune the surface acid-base behavior. Density functional theory (DFT) calculations were used to rationalize the XPS observations showing that -NH3 + functions irreversibly transfer a proton to neighboring M-O- surface groups. The acid-base surface properties can be further modified by adding a phosphonate "capping" on the M surface sites. Our findings have a series of interesting implications in surface functionalization: attachment of biomolecules to surfaces, design of perm-selective or philicity-selective membranes, or design of catalysts that show a well-defined organic reactive function near surface hydroxyl groups. © 2008 American Chemical Society.
author	Angelomé, Paula C. Sánchez, Verónica Muriel Williams, Federico Jose Soler Illia, Galo Juan de Avila Arturo
author_facet	Angelomé, Paula C. Sánchez, Verónica Muriel Williams, Federico Jose Soler Illia, Galo Juan de Avila Arturo
author_sort	Angelomé, Paula C.
title	Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior
title_short	Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior
title_full	Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior
title_fullStr	Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior
title_full_unstemmed	Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior
title_sort	mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior
publishDate	2008
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v20_n14_p4661_Calvo http://hdl.handle.net/20.500.12110/paper_08974756_v20_n14_p4661_Calvo
work_keys_str_mv	AT angelomepaulac mesoporousaminopropylfunctionalizedhybridthinfilmswithmodulablesurfaceandenvironmentresponsivebehavior AT sanchezveronicamuriel mesoporousaminopropylfunctionalizedhybridthinfilmswithmodulablesurfaceandenvironmentresponsivebehavior AT williamsfedericojose mesoporousaminopropylfunctionalizedhybridthinfilmswithmodulablesurfaceandenvironmentresponsivebehavior AT solerilliagalojuandeavilaarturo mesoporousaminopropylfunctionalizedhybridthinfilmswithmodulablesurfaceandenvironmentresponsivebehavior
_version_	1768546634120036352

Mesoporous aminopropyl-functionalized hybrid thin films with modulable surface and environment-responsive behavior

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