Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift

Autores
Santiago González, B.; Vázquez Vázquez, C.; Blanco Varela, M. C.; Gaspar Martinho, J. M.; Ramallo Lopez, Jose Martin; Requejo, Felix Gregorio; López Quintela, M. A.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This paper reports a novel procedure using nanosomes, made of bola-hydroxyl and mercapto-palmitic acids, for the production of gold clusters with robust luminescent emissions and very large Stokes shifts. It shows that these results cannot be explained by the currently accepted mechanism based on ligand-to-metal charge transfer absorptions involving electron-rich ligands attached to the cluster core. Exhaustive characterization of the cluster samples using Mass Spectrometry, HR-TEM/STEM, XPS, EXAFS, and steady-state and time-resolved luminescence allows to deduce that a mixture of two cluster sizes, having non-closed shell electronic configurations, are firstly generated inside the nanosome compartments due to the difference in bonding strength of the two types of terminal groups in the fatty acids. This initial bimodal cluster size distribution slowly evolves into very stable, closed-shell Au cluster complexes (Au6-Au16 and Au5-Au14) responsible for the observed luminescent properties. The very small (≈1.2 nm) synthesized cluster complexes are water soluble and suitable to be used for the conjugation of biomolecules (through the terminal COO− groups) making these systems very attractive as biomarkers and offering, at the same time, a novel general strategy of fabricating stable atom-level quantum dots with large Stokes shifts of great importance in many sensor applications.
Fil: Santiago González, B.. Universidad de Santiago de Compostela; España
Fil: Vázquez Vázquez, C.. Universidad de Santiago de Compostela; España
Fil: Blanco Varela, M. C.. Universidad de Santiago de Compostela; España
Fil: Gaspar Martinho, J. M.. Universidade de Lisboa; Portugal
Fil: Ramallo Lopez, Jose Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Requejo, Felix Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: López Quintela, M. A.. Universidad de Santiago de Compostela; España
Materia
Luminescent Gold Clusters
Clustercluster Complexes
Large Stokes Shifts
Nanosomes
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5474
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5474
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shiftSantiago González, B.Vázquez Vázquez, C.Blanco Varela, M. C.Gaspar Martinho, J. M.Ramallo Lopez, Jose MartinRequejo, Felix GregorioLópez Quintela, M. A.Luminescent Gold ClustersClustercluster ComplexesLarge Stokes ShiftsNanosomeshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1This paper reports a novel procedure using nanosomes, made of bola-hydroxyl and mercapto-palmitic acids, for the production of gold clusters with robust luminescent emissions and very large Stokes shifts. It shows that these results cannot be explained by the currently accepted mechanism based on ligand-to-metal charge transfer absorptions involving electron-rich ligands attached to the cluster core. Exhaustive characterization of the cluster samples using Mass Spectrometry, HR-TEM/STEM, XPS, EXAFS, and steady-state and time-resolved luminescence allows to deduce that a mixture of two cluster sizes, having non-closed shell electronic configurations, are firstly generated inside the nanosome compartments due to the difference in bonding strength of the two types of terminal groups in the fatty acids. This initial bimodal cluster size distribution slowly evolves into very stable, closed-shell Au cluster complexes (Au6-Au16 and Au5-Au14) responsible for the observed luminescent properties. The very small (≈1.2 nm) synthesized cluster complexes are water soluble and suitable to be used for the conjugation of biomolecules (through the terminal COO− groups) making these systems very attractive as biomarkers and offering, at the same time, a novel general strategy of fabricating stable atom-level quantum dots with large Stokes shifts of great importance in many sensor applications.Fil: Santiago González, B.. Universidad de Santiago de Compostela; EspañaFil: Vázquez Vázquez, C.. Universidad de Santiago de Compostela; EspañaFil: Blanco Varela, M. C.. Universidad de Santiago de Compostela; EspañaFil: Gaspar Martinho, J. M.. Universidade de Lisboa; PortugalFil: Ramallo Lopez, Jose Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Requejo, Felix Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: López Quintela, M. A.. Universidad de Santiago de Compostela; EspañaElsevier2015-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5474Santiago González, B.; Vázquez Vázquez, C.; Blanco Varela, M. C.; Gaspar Martinho, J. M.; Ramallo Lopez, Jose Martin; et al.; Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift; Elsevier; Journal of Colloid and Interface Science; 455; 6-2015; 154-1620021-9797enginfo:eu-repo/semantics/altIdentifier/pmid/26068374info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jcis.2015.05.042info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0021979715004993info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:40:06Zoai:ri.conicet.gov.ar:11336/5474instacron: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:34982025-10-22 11:40:07.161CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
title Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
spellingShingle Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
Santiago González, B.
Luminescent Gold Clusters
Clustercluster Complexes
Large Stokes Shifts
Nanosomes
title_short Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
title_full Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
title_fullStr Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
title_full_unstemmed Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
title_sort Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
dc.creator.none.fl_str_mv Santiago González, B.
Vázquez Vázquez, C.
Blanco Varela, M. C.
Gaspar Martinho, J. M.
Ramallo Lopez, Jose Martin
Requejo, Felix Gregorio
López Quintela, M. A.
author Santiago González, B.
author_facet Santiago González, B.
Vázquez Vázquez, C.
Blanco Varela, M. C.
Gaspar Martinho, J. M.
Ramallo Lopez, Jose Martin
Requejo, Felix Gregorio
López Quintela, M. A.
author_role author
author2 Vázquez Vázquez, C.
Blanco Varela, M. C.
Gaspar Martinho, J. M.
Ramallo Lopez, Jose Martin
Requejo, Felix Gregorio
López Quintela, M. A.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Luminescent Gold Clusters
Clustercluster Complexes
Large Stokes Shifts
Nanosomes
topic Luminescent Gold Clusters
Clustercluster Complexes
Large Stokes Shifts
Nanosomes
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This paper reports a novel procedure using nanosomes, made of bola-hydroxyl and mercapto-palmitic acids, for the production of gold clusters with robust luminescent emissions and very large Stokes shifts. It shows that these results cannot be explained by the currently accepted mechanism based on ligand-to-metal charge transfer absorptions involving electron-rich ligands attached to the cluster core. Exhaustive characterization of the cluster samples using Mass Spectrometry, HR-TEM/STEM, XPS, EXAFS, and steady-state and time-resolved luminescence allows to deduce that a mixture of two cluster sizes, having non-closed shell electronic configurations, are firstly generated inside the nanosome compartments due to the difference in bonding strength of the two types of terminal groups in the fatty acids. This initial bimodal cluster size distribution slowly evolves into very stable, closed-shell Au cluster complexes (Au6-Au16 and Au5-Au14) responsible for the observed luminescent properties. The very small (≈1.2 nm) synthesized cluster complexes are water soluble and suitable to be used for the conjugation of biomolecules (through the terminal COO− groups) making these systems very attractive as biomarkers and offering, at the same time, a novel general strategy of fabricating stable atom-level quantum dots with large Stokes shifts of great importance in many sensor applications.
Fil: Santiago González, B.. Universidad de Santiago de Compostela; España
Fil: Vázquez Vázquez, C.. Universidad de Santiago de Compostela; España
Fil: Blanco Varela, M. C.. Universidad de Santiago de Compostela; España
Fil: Gaspar Martinho, J. M.. Universidade de Lisboa; Portugal
Fil: Ramallo Lopez, Jose Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Requejo, Felix Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: López Quintela, M. A.. Universidad de Santiago de Compostela; España
description This paper reports a novel procedure using nanosomes, made of bola-hydroxyl and mercapto-palmitic acids, for the production of gold clusters with robust luminescent emissions and very large Stokes shifts. It shows that these results cannot be explained by the currently accepted mechanism based on ligand-to-metal charge transfer absorptions involving electron-rich ligands attached to the cluster core. Exhaustive characterization of the cluster samples using Mass Spectrometry, HR-TEM/STEM, XPS, EXAFS, and steady-state and time-resolved luminescence allows to deduce that a mixture of two cluster sizes, having non-closed shell electronic configurations, are firstly generated inside the nanosome compartments due to the difference in bonding strength of the two types of terminal groups in the fatty acids. This initial bimodal cluster size distribution slowly evolves into very stable, closed-shell Au cluster complexes (Au6-Au16 and Au5-Au14) responsible for the observed luminescent properties. The very small (≈1.2 nm) synthesized cluster complexes are water soluble and suitable to be used for the conjugation of biomolecules (through the terminal COO− groups) making these systems very attractive as biomarkers and offering, at the same time, a novel general strategy of fabricating stable atom-level quantum dots with large Stokes shifts of great importance in many sensor applications.
publishDate 2015
dc.date.none.fl_str_mv 2015-06
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/11336/5474
Santiago González, B.; Vázquez Vázquez, C.; Blanco Varela, M. C.; Gaspar Martinho, J. M.; Ramallo Lopez, Jose Martin; et al.; Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift; Elsevier; Journal of Colloid and Interface Science; 455; 6-2015; 154-162
0021-9797
url http://hdl.handle.net/11336/5474
identifier_str_mv Santiago González, B.; Vázquez Vázquez, C.; Blanco Varela, M. C.; Gaspar Martinho, J. M.; Ramallo Lopez, Jose Martin; et al.; Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift; Elsevier; Journal of Colloid and Interface Science; 455; 6-2015; 154-162
0021-9797
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/pmid/26068374
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jcis.2015.05.042
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0021979715004993
info:eu-repo/semantics/altIdentifier/doi/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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 12.982451

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