Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films

et al.

Detalles Bibliográficos
Autores: Ballesteros, Luz M., Martín, Santiago, Low, Paul J., Cea, Pilar
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/117513
Acceso en línea:http://hdl.handle.net/10261/117513
Access Level:acceso abierto
Palabra clave:Oligo(phenylene ethynylene)s
Scanning probe microsco
Langmuir–Blodgett films
Conducting materials
Carboxylic acids
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spelling Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett filmsBallesteros, Luz M.Martín, SantiagoLow, Paul J.Cea, PilarOligo(phenylene ethynylene)sScanning probe microscoLangmuir–Blodgett filmsConducting materialsCarboxylic acidset al.The preparation, characterization and electrical properties of Langmuir–Blodgett (LB) films composed of a symmetrically substituted oligomeric phenylene ethynylene derivative, namely, 4,4′-[1,4-phenylenebis(ethyne-2,1-diyl)]dibenzoic acid (OPE2A), are described. Analysis of the surface pressure versus area per molecule isotherms and Brewster angle microscopy reveal that good-quality Langmuir (L) films can be formed both on pure water and a basic subphase. Monolayer L films were transferred onto solid substrates with a transfer ratio of unity to obtain LB films. Both L and LB films prepared on or from a pure water subphase show a red shift in the UV/Vis spectrum of about 14 nm, in contrast to L and LB films prepared from a basic subphase, which show a hypsochromic shift of 15 nm. This result, together with X-ray photoelectron spectroscopic and quartz crystal microbalance experiments, conclusively demonstrate formation of one-layer LB films in which OPE2A molecules are chemisorbed onto gold substrates and consequently COOAu junctions are formed. In LB films prepared on a basic subphase the other terminal acid group is also deprotonated and associates with an Na+ counterion. In contrast, LB films prepared from a pure water subphase preserve the protonated acid group, and lateral H-bonds with neighbouring molecules give rise to a supramolecular structure. STM-based conductance studies revealed that films prepared from a basic subphase are more conductive than the analogous films prepared from pure water, and the electrical conductance of the deprotonated films also coincides more closely with single-molecule conductance measurements. This result was interpreted not only in terms of better electron transmission in COOAu molecular junctions, but also in terms of the presence of lateral H-bonds in the films formed from pure water, which lead to reduced conductance of the molecular junctions.S.M. and P.C. are grateful for financial assistance from Ministerio de Ciencia e Innovación (Spain) and fondos FEDER in the framework of projects CTQ2009-13024 and CTQ2012-33198. P.J.L holds an EPSRC Leadership Fellowship. R.J.N. thanks EPSRC for funding. S.M. acknowledges his Ramón y Cajal position from Ministerio de Ciencia e Innovación (Spain). L.M.B and J.C. acknowledge their grants from Banco Santander and Ministerio de Economía y Competitividad, respectively.Peer ReviewedWiley-VCHMinisterio de Ciencia e Innovación (España)Engineering and Physical Sciences Research Council (UK)Ministerio de Economía y Competitividad (España)European CommissionBanco SantanderConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2015201520132015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/117513reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1002/chem.201203261Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1175132026-05-22T06:33:51Z
dc.title.none.fl_str_mv Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films
title Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films
spellingShingle Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films
Ballesteros, Luz M.
Oligo(phenylene ethynylene)s
Scanning probe microsco
Langmuir–Blodgett films
Conducting materials
Carboxylic acids
title_short Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films
title_full Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films
title_fullStr Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films
title_full_unstemmed Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films
title_sort Controlling the structural and electrical properties of diacid oligo(phenylene ethynylene) Langmuir-Blodgett films
dc.creator.none.fl_str_mv Ballesteros, Luz M.
Martín, Santiago
Low, Paul J.
Cea, Pilar
author Ballesteros, Luz M.
author_facet Ballesteros, Luz M.
Martín, Santiago
Low, Paul J.
Cea, Pilar
author_role author
author2 Martín, Santiago
Low, Paul J.
Cea, Pilar
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Engineering and Physical Sciences Research Council (UK)
Ministerio de Economía y Competitividad (España)
European Commission
Banco Santander
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Oligo(phenylene ethynylene)s
Scanning probe microsco
Langmuir–Blodgett films
Conducting materials
Carboxylic acids
topic Oligo(phenylene ethynylene)s
Scanning probe microsco
Langmuir–Blodgett films
Conducting materials
Carboxylic acids
description et al.
publishDate 2013
dc.date.none.fl_str_mv 2013
2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/117513
url http://hdl.handle.net/10261/117513
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1002/chem.201203261
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wiley-VCH
publisher.none.fl_str_mv Wiley-VCH
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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