A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111)
- Autores
- O'Boyle, Noel M.; Albrecht, Tim; Murgida, Daniel Horacio; Cassidy, Lynda; Ulstrup, Jens; Vos, Johannes G.
- Año de publicación
- 2007
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present a density functional theory (DFT) study of an osmium polypyridyl complex adsorbed on Au(111). The osmium polypyridyl complex [Os(bpy)2(P0P)Cl]n+ [bpy is 2,2'-bipyridine, P0P is 4,4'-bipyridine, n = 1 for osmium(II), and n = 2 for osmium(III)] is bound to the surface through the free nitrogen of the P0P ligand. The calculations illuminate electronic properties relevant to recent comprehensive characterization of this class of osmium complexes by electrochemistry and electrochemical scanning tunneling microscopy. The optimized structures for the compounds are in close agreement with crystallographic structures reported in the literature. Oxidation of the complex has little effect on these structural features, but there is a substantial reordering of the electronic energy levels with corresponding changes in the electron density. Significantly, the highest occupied molecular orbital shifts from the metal center to the P0P ligand. The surface is modeled by a cluster of 28 gold atoms and gives a good description of the effect of immobilization on the electronic properties of the complexes. The results show that the coupling between the immobilized complex and the gold surface involves electronic polarization at the adsorbate/substrate interface rather than the formation of a covalent bond. However, the cluster is too small to fully represent bulk gold with the result that, contrary to what is experimentally observed, the DFT calculation predicts that the gold surface is more easily oxidized than the osmium(II) complex.
Fil: O'Boyle, Noel M.. Dublin City University; Irlanda
Fil: Albrecht, Tim. Technical University of Denmark; Dinamarca
Fil: Murgida, Daniel Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Technische Universita¨t Berlin; Alemania
Fil: Cassidy, Lynda. Dublin City University; Irlanda
Fil: Ulstrup, Jens. Technical University of Denmark; Dinamarca
Fil: Vos, Johannes G.. Dublin City University; Irlanda - Materia
-
OSMIUM COMPLEXES
ELECTRON TRANSFER
RAMAN
DFT CALCULATIONS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/103856
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A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111)O'Boyle, Noel M.Albrecht, TimMurgida, Daniel HoracioCassidy, LyndaUlstrup, JensVos, Johannes G.OSMIUM COMPLEXESELECTRON TRANSFERRAMANDFT CALCULATIONShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1We present a density functional theory (DFT) study of an osmium polypyridyl complex adsorbed on Au(111). The osmium polypyridyl complex [Os(bpy)2(P0P)Cl]n+ [bpy is 2,2'-bipyridine, P0P is 4,4'-bipyridine, n = 1 for osmium(II), and n = 2 for osmium(III)] is bound to the surface through the free nitrogen of the P0P ligand. The calculations illuminate electronic properties relevant to recent comprehensive characterization of this class of osmium complexes by electrochemistry and electrochemical scanning tunneling microscopy. The optimized structures for the compounds are in close agreement with crystallographic structures reported in the literature. Oxidation of the complex has little effect on these structural features, but there is a substantial reordering of the electronic energy levels with corresponding changes in the electron density. Significantly, the highest occupied molecular orbital shifts from the metal center to the P0P ligand. The surface is modeled by a cluster of 28 gold atoms and gives a good description of the effect of immobilization on the electronic properties of the complexes. The results show that the coupling between the immobilized complex and the gold surface involves electronic polarization at the adsorbate/substrate interface rather than the formation of a covalent bond. However, the cluster is too small to fully represent bulk gold with the result that, contrary to what is experimentally observed, the DFT calculation predicts that the gold surface is more easily oxidized than the osmium(II) complex.Fil: O'Boyle, Noel M.. Dublin City University; IrlandaFil: Albrecht, Tim. Technical University of Denmark; DinamarcaFil: Murgida, Daniel Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Technische Universita¨t Berlin; AlemaniaFil: Cassidy, Lynda. Dublin City University; IrlandaFil: Ulstrup, Jens. Technical University of Denmark; DinamarcaFil: Vos, Johannes G.. Dublin City University; IrlandaAmerican Chemical Society2007-01-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/103856O'Boyle, Noel M.; Albrecht, Tim; Murgida, Daniel Horacio; Cassidy, Lynda; Ulstrup, Jens; et al.; A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111); American Chemical Society; Inorganic Chemistry; 46; 1; 8-1-2007; 117-1240020-1669CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/ic060903einfo:eu-repo/semantics/altIdentifier/doi/10.1021/ic060903einfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:54:15Zoai:ri.conicet.gov.ar:11336/103856instacron: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:34982025-09-29 09:54:15.488CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111) |
title |
A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111) |
spellingShingle |
A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111) O'Boyle, Noel M. OSMIUM COMPLEXES ELECTRON TRANSFER RAMAN DFT CALCULATIONS |
title_short |
A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111) |
title_full |
A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111) |
title_fullStr |
A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111) |
title_full_unstemmed |
A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111) |
title_sort |
A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111) |
dc.creator.none.fl_str_mv |
O'Boyle, Noel M. Albrecht, Tim Murgida, Daniel Horacio Cassidy, Lynda Ulstrup, Jens Vos, Johannes G. |
author |
O'Boyle, Noel M. |
author_facet |
O'Boyle, Noel M. Albrecht, Tim Murgida, Daniel Horacio Cassidy, Lynda Ulstrup, Jens Vos, Johannes G. |
author_role |
author |
author2 |
Albrecht, Tim Murgida, Daniel Horacio Cassidy, Lynda Ulstrup, Jens Vos, Johannes G. |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
OSMIUM COMPLEXES ELECTRON TRANSFER RAMAN DFT CALCULATIONS |
topic |
OSMIUM COMPLEXES ELECTRON TRANSFER RAMAN DFT CALCULATIONS |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We present a density functional theory (DFT) study of an osmium polypyridyl complex adsorbed on Au(111). The osmium polypyridyl complex [Os(bpy)2(P0P)Cl]n+ [bpy is 2,2'-bipyridine, P0P is 4,4'-bipyridine, n = 1 for osmium(II), and n = 2 for osmium(III)] is bound to the surface through the free nitrogen of the P0P ligand. The calculations illuminate electronic properties relevant to recent comprehensive characterization of this class of osmium complexes by electrochemistry and electrochemical scanning tunneling microscopy. The optimized structures for the compounds are in close agreement with crystallographic structures reported in the literature. Oxidation of the complex has little effect on these structural features, but there is a substantial reordering of the electronic energy levels with corresponding changes in the electron density. Significantly, the highest occupied molecular orbital shifts from the metal center to the P0P ligand. The surface is modeled by a cluster of 28 gold atoms and gives a good description of the effect of immobilization on the electronic properties of the complexes. The results show that the coupling between the immobilized complex and the gold surface involves electronic polarization at the adsorbate/substrate interface rather than the formation of a covalent bond. However, the cluster is too small to fully represent bulk gold with the result that, contrary to what is experimentally observed, the DFT calculation predicts that the gold surface is more easily oxidized than the osmium(II) complex. Fil: O'Boyle, Noel M.. Dublin City University; Irlanda Fil: Albrecht, Tim. Technical University of Denmark; Dinamarca Fil: Murgida, Daniel Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Technische Universita¨t Berlin; Alemania Fil: Cassidy, Lynda. Dublin City University; Irlanda Fil: Ulstrup, Jens. Technical University of Denmark; Dinamarca Fil: Vos, Johannes G.. Dublin City University; Irlanda |
description |
We present a density functional theory (DFT) study of an osmium polypyridyl complex adsorbed on Au(111). The osmium polypyridyl complex [Os(bpy)2(P0P)Cl]n+ [bpy is 2,2'-bipyridine, P0P is 4,4'-bipyridine, n = 1 for osmium(II), and n = 2 for osmium(III)] is bound to the surface through the free nitrogen of the P0P ligand. The calculations illuminate electronic properties relevant to recent comprehensive characterization of this class of osmium complexes by electrochemistry and electrochemical scanning tunneling microscopy. The optimized structures for the compounds are in close agreement with crystallographic structures reported in the literature. Oxidation of the complex has little effect on these structural features, but there is a substantial reordering of the electronic energy levels with corresponding changes in the electron density. Significantly, the highest occupied molecular orbital shifts from the metal center to the P0P ligand. The surface is modeled by a cluster of 28 gold atoms and gives a good description of the effect of immobilization on the electronic properties of the complexes. The results show that the coupling between the immobilized complex and the gold surface involves electronic polarization at the adsorbate/substrate interface rather than the formation of a covalent bond. However, the cluster is too small to fully represent bulk gold with the result that, contrary to what is experimentally observed, the DFT calculation predicts that the gold surface is more easily oxidized than the osmium(II) complex. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-01-08 |
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/11336/103856 O'Boyle, Noel M.; Albrecht, Tim; Murgida, Daniel Horacio; Cassidy, Lynda; Ulstrup, Jens; et al.; A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111); American Chemical Society; Inorganic Chemistry; 46; 1; 8-1-2007; 117-124 0020-1669 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/103856 |
identifier_str_mv |
O'Boyle, Noel M.; Albrecht, Tim; Murgida, Daniel Horacio; Cassidy, Lynda; Ulstrup, Jens; et al.; A density functional theory study of the electronic properties of Os(II) and Os(III) complexes immobilized on Au(111); American Chemical Society; Inorganic Chemistry; 46; 1; 8-1-2007; 117-124 0020-1669 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/ic060903e info:eu-repo/semantics/altIdentifier/doi/10.1021/ic060903e |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
American Chemical Society |
publisher.none.fl_str_mv |
American Chemical Society |
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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1844613649643077632 |
score |
13.070432 |