Synthesis, acid properties and catalysis by niobium oxide nanostructured materials

Autores
Marin, M. Luisa; Hallett Tapley, Geniece L.; Impellizzeri, Stefania; Fasciani, Chiara; Simoncelli, Sabrina; Netto Ferreira, José Carlos; Scaiano, Juan C.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Several forms of niobium oxide were prepared, including nanostructured mesoporous materials, and their acidity properties were comprehensively investigated and compared with commercially available materials. The composites were characterized by a variety of techniques, including XRD, TEM, N2 adsorption and Hammett acid indicator studies. The acidity of the niobium oxide derivatives was also investigated by the ability of the materials to successfully promote the halochromic ring-opening of an oxazine-coumarin probe that was specifically designed for use in fluorescence imaging studies. The ring-opening reaction was easily monitored using UV-visible, fluorescence and NMR spectroscopy. Single molecule microscopy was employed to gain a more in-depth understanding of the niobium oxide acid catalysis pathway. Using this technique, the rate of niobium oxide mediated protonation was estimated to be 1.8 x 10^-13 mol m^-2 s^-2. Single molecule analysis was also used to obtain a detailed map of Brønsted acid sites on the niobium oxide surface. The active sites, located by multiple blinking events, do not seem to be localized on any area of the material, but rather randomly distributed throughout the solid state surface. As the reaction proceeds, the sites with the highest acidity and accessibility are gradually consumed, making the next tier of acid sites available for reaction. The phenomenon was more closely characterized by using time lapsed reactivity maps.
Fil: Marin, M. Luisa. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química; España
Fil: Hallett Tapley, Geniece L.. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá
Fil: Impellizzeri, Stefania. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá
Fil: Fasciani, Chiara. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá
Fil: Simoncelli, Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Quimica Fisica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Centro de Investigaciones en Bionanociencias "Elizabeth Jares Erijman"; Argentina
Fil: Netto Ferreira, José Carlos. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Instituto Nacional de Metrologia, Qualidade e Tecnologia. Divisão de Metrologia Química; Brasil
Fil: Scaiano, Juan C.. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá
Materia
Niobium Oxide
Acid Properties
Catalysis
Single Molecule
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/4095
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/4095
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Synthesis, acid properties and catalysis by niobium oxide nanostructured materialsMarin, M. LuisaHallett Tapley, Geniece L.Impellizzeri, StefaniaFasciani, ChiaraSimoncelli, SabrinaNetto Ferreira, José CarlosScaiano, Juan C.Niobium OxideAcid PropertiesCatalysisSingle Moleculehttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Several forms of niobium oxide were prepared, including nanostructured mesoporous materials, and their acidity properties were comprehensively investigated and compared with commercially available materials. The composites were characterized by a variety of techniques, including XRD, TEM, N2 adsorption and Hammett acid indicator studies. The acidity of the niobium oxide derivatives was also investigated by the ability of the materials to successfully promote the halochromic ring-opening of an oxazine-coumarin probe that was specifically designed for use in fluorescence imaging studies. The ring-opening reaction was easily monitored using UV-visible, fluorescence and NMR spectroscopy. Single molecule microscopy was employed to gain a more in-depth understanding of the niobium oxide acid catalysis pathway. Using this technique, the rate of niobium oxide mediated protonation was estimated to be 1.8 x 10^-13 mol m^-2 s^-2. Single molecule analysis was also used to obtain a detailed map of Brønsted acid sites on the niobium oxide surface. The active sites, located by multiple blinking events, do not seem to be localized on any area of the material, but rather randomly distributed throughout the solid state surface. As the reaction proceeds, the sites with the highest acidity and accessibility are gradually consumed, making the next tier of acid sites available for reaction. The phenomenon was more closely characterized by using time lapsed reactivity maps.Fil: Marin, M. Luisa. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química; EspañaFil: Hallett Tapley, Geniece L.. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; CanadáFil: Impellizzeri, Stefania. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; CanadáFil: Fasciani, Chiara. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; CanadáFil: Simoncelli, Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Quimica Fisica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Centro de Investigaciones en Bionanociencias "Elizabeth Jares Erijman"; ArgentinaFil: Netto Ferreira, José Carlos. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Instituto Nacional de Metrologia, Qualidade e Tecnologia. Divisão de Metrologia Química; BrasilFil: Scaiano, Juan C.. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; CanadáRoyal Society of Chemistry2014-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4095Marin, M. Luisa; Hallett Tapley, Geniece L.; Impellizzeri, Stefania; Fasciani, Chiara; Simoncelli, Sabrina; et al.; Synthesis, acid properties and catalysis by niobium oxide nanostructured materials; Royal Society of Chemistry; Catalysis Science & Technology; 4; 9; 4-2014; 3044-30522044-4753enginfo:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/content/articlelanding/cy/2014/c4cy00238e#!divAbstractinfo:eu-repo/semantics/altIdentifier/doi/DOI:10.1039/C4CY00238Einfo:eu-repo/semantics/altIdentifier/issn/2044-4753info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:21:07Zoai:ri.conicet.gov.ar:11336/4095instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:21:08.248CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Synthesis, acid properties and catalysis by niobium oxide nanostructured materials
title Synthesis, acid properties and catalysis by niobium oxide nanostructured materials
spellingShingle Synthesis, acid properties and catalysis by niobium oxide nanostructured materials
Marin, M. Luisa
Niobium Oxide
Acid Properties
Catalysis
Single Molecule
title_short Synthesis, acid properties and catalysis by niobium oxide nanostructured materials
title_full Synthesis, acid properties and catalysis by niobium oxide nanostructured materials
title_fullStr Synthesis, acid properties and catalysis by niobium oxide nanostructured materials
title_full_unstemmed Synthesis, acid properties and catalysis by niobium oxide nanostructured materials
title_sort Synthesis, acid properties and catalysis by niobium oxide nanostructured materials
dc.creator.none.fl_str_mv Marin, M. Luisa
Hallett Tapley, Geniece L.
Impellizzeri, Stefania
Fasciani, Chiara
Simoncelli, Sabrina
Netto Ferreira, José Carlos
Scaiano, Juan C.
author Marin, M. Luisa
author_facet Marin, M. Luisa
Hallett Tapley, Geniece L.
Impellizzeri, Stefania
Fasciani, Chiara
Simoncelli, Sabrina
Netto Ferreira, José Carlos
Scaiano, Juan C.
author_role author
author2 Hallett Tapley, Geniece L.
Impellizzeri, Stefania
Fasciani, Chiara
Simoncelli, Sabrina
Netto Ferreira, José Carlos
Scaiano, Juan C.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Niobium Oxide
Acid Properties
Catalysis
Single Molecule
topic Niobium Oxide
Acid Properties
Catalysis
Single Molecule
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Several forms of niobium oxide were prepared, including nanostructured mesoporous materials, and their acidity properties were comprehensively investigated and compared with commercially available materials. The composites were characterized by a variety of techniques, including XRD, TEM, N2 adsorption and Hammett acid indicator studies. The acidity of the niobium oxide derivatives was also investigated by the ability of the materials to successfully promote the halochromic ring-opening of an oxazine-coumarin probe that was specifically designed for use in fluorescence imaging studies. The ring-opening reaction was easily monitored using UV-visible, fluorescence and NMR spectroscopy. Single molecule microscopy was employed to gain a more in-depth understanding of the niobium oxide acid catalysis pathway. Using this technique, the rate of niobium oxide mediated protonation was estimated to be 1.8 x 10^-13 mol m^-2 s^-2. Single molecule analysis was also used to obtain a detailed map of Brønsted acid sites on the niobium oxide surface. The active sites, located by multiple blinking events, do not seem to be localized on any area of the material, but rather randomly distributed throughout the solid state surface. As the reaction proceeds, the sites with the highest acidity and accessibility are gradually consumed, making the next tier of acid sites available for reaction. The phenomenon was more closely characterized by using time lapsed reactivity maps.
Fil: Marin, M. Luisa. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química; España
Fil: Hallett Tapley, Geniece L.. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá
Fil: Impellizzeri, Stefania. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá
Fil: Fasciani, Chiara. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá
Fil: Simoncelli, Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Quimica Fisica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Centro de Investigaciones en Bionanociencias "Elizabeth Jares Erijman"; Argentina
Fil: Netto Ferreira, José Carlos. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá. Instituto Nacional de Metrologia, Qualidade e Tecnologia. Divisão de Metrologia Química; Brasil
Fil: Scaiano, Juan C.. University of Ottawa. Department of Chemistry and Centre for Catalysis Research and Innovation; Canadá
description Several forms of niobium oxide were prepared, including nanostructured mesoporous materials, and their acidity properties were comprehensively investigated and compared with commercially available materials. The composites were characterized by a variety of techniques, including XRD, TEM, N2 adsorption and Hammett acid indicator studies. The acidity of the niobium oxide derivatives was also investigated by the ability of the materials to successfully promote the halochromic ring-opening of an oxazine-coumarin probe that was specifically designed for use in fluorescence imaging studies. The ring-opening reaction was easily monitored using UV-visible, fluorescence and NMR spectroscopy. Single molecule microscopy was employed to gain a more in-depth understanding of the niobium oxide acid catalysis pathway. Using this technique, the rate of niobium oxide mediated protonation was estimated to be 1.8 x 10^-13 mol m^-2 s^-2. Single molecule analysis was also used to obtain a detailed map of Brønsted acid sites on the niobium oxide surface. The active sites, located by multiple blinking events, do not seem to be localized on any area of the material, but rather randomly distributed throughout the solid state surface. As the reaction proceeds, the sites with the highest acidity and accessibility are gradually consumed, making the next tier of acid sites available for reaction. The phenomenon was more closely characterized by using time lapsed reactivity maps.
publishDate 2014
dc.date.none.fl_str_mv 2014-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/4095
Marin, M. Luisa; Hallett Tapley, Geniece L.; Impellizzeri, Stefania; Fasciani, Chiara; Simoncelli, Sabrina; et al.; Synthesis, acid properties and catalysis by niobium oxide nanostructured materials; Royal Society of Chemistry; Catalysis Science & Technology; 4; 9; 4-2014; 3044-3052
2044-4753
url http://hdl.handle.net/11336/4095
identifier_str_mv Marin, M. Luisa; Hallett Tapley, Geniece L.; Impellizzeri, Stefania; Fasciani, Chiara; Simoncelli, Sabrina; et al.; Synthesis, acid properties and catalysis by niobium oxide nanostructured materials; Royal Society of Chemistry; Catalysis Science & Technology; 4; 9; 4-2014; 3044-3052
2044-4753
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/content/articlelanding/cy/2014/c4cy00238e#!divAbstract
info:eu-repo/semantics/altIdentifier/doi/DOI:10.1039/C4CY00238E
info:eu-repo/semantics/altIdentifier/issn/2044-4753
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.221938

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