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dc.contributor.author
Xu, Tao
dc.contributor.author
Waehler, Tobias
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Vecchietti, María Julia
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dc.contributor.author
Bonivardi, Adrian Lionel
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Bauer, Tanja
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Schwegler, Johannes
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Schulz, Peter S.
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Wasserscheid, Peter
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Libuda, Joerg
dc.date.available
2018-03-28T16:04:13Z
dc.date.issued
2017-12
dc.identifier.citation
Xu, Tao; Waehler, Tobias; Vecchietti, María Julia; Bonivardi, Adrian Lionel; Bauer, Tanja; et al.; Interaction of Ester-Functionalized Ionic Liquids with Atomically-Defined Cobalt Oxides Surfaces: Adsorption, Reaction and Thermal Stability; Wiley VCH Verlag; Chemphyschem; 18; 23; 12-2017; 3443-3453
dc.identifier.issn
1439-4235
dc.identifier.uri
http://hdl.handle.net/11336/40365
dc.description.abstract
Hybrid materials consisting of ionic liquid (ILs) films on supported oxides hold a great potential for applications in electronic and energy materials. In this work, we have performed surface science model studies scrutinizing the interaction of ester-functionalized ILs with atomically defined Co3O4(111) and CoO(100) surfaces. Both supports are prepared under ultra-high vacuum (UHV) conditions in form of thin films on Ir(100) single crystals. Subsequently, thin films of three ILs, 3-butyl-1-methyl imidazolium bis(trifluoromethyl-sulfonyl) imide ([BMIM][NTf2]), 3-(4-methoxyl-4-oxobutyl)-1-methylimidazolium bis(trifluoromethyl-sulfonyl) imide ([MBMIM][NTf2]), and 3-(4-isopropoxy-4-oxobutyl)-1-methylimidazolium bis(trifluoromethyl-sulfonyl) imide ([IPBMIM][NTf2]), were deposited on these surfaces by physical vapor deposition (PVD). Time-resolved and temperature-programmed infrared reflection absorption spectroscopy (TR-IRAS, TP-IRAS) were applied to monitor in situ the adsorption, film growth, and thermally induced desorption. By TP-IRAS, we determined the multilayer desorption temperature of [BMIM][NTf2] (360±5 K), [MBMIM][NTf2] (380 K) and [IPBMIM][NTf2] (380 K). Upon deposition below the multilayer desorption temperature, all three ILs physisorb on both cobalt oxide surfaces. However, strong orientation effects are observed in the first monolayer, where the [NTf2]− ion interacts with the surface through the SO2 groups and the CF3 groups point towards the vacuum. For the two functionalized ILs, the [MBMIM]+ and [IPBMIM]+ interact with the surface Co2+ ions of both surfaces via the CO group of their ester function. A very different behavior is found, if the ILs are deposited above the multilayer desorption temperature (400 K). While for [BMIM][NTf2] and [MBMIM][NTf2] a molecularly adsorbed monolayer film is formed, [IPBMIM][NTf2] undergoes a chemical transformation on the CoO(100) surface. Here, the ester group is cleaved and the cation is chemically linked to the surface by formation of a surface carboxylate. The IL-derived species in the monolayer desorb at temperatures around 500 to 550 K.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley VCH Verlag
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Chemical Anchoring
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Cobalt Oxide
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Ionic Liquids
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Iras
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Thermal Stability
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Otras Ciencias Químicas
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Interaction of Ester-Functionalized Ionic Liquids with Atomically-Defined Cobalt Oxides Surfaces: Adsorption, Reaction and Thermal Stability
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-21T16:00:50Z
dc.journal.volume
18
dc.journal.number
23
dc.journal.pagination
3443-3453
dc.journal.pais
Alemania
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dc.journal.ciudad
Weinheim
dc.description.fil
Fil: Xu, Tao. Universitat Erlangen-Nuremberg; Alemania
dc.description.fil
Fil: Waehler, Tobias. Universitat Erlangen-Nuremberg; Alemania
dc.description.fil
Fil: Vecchietti, María Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
dc.description.fil
Fil: Bonivardi, Adrian Lionel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
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Fil: Bauer, Tanja. Universitat Erlangen-Nuremberg; Alemania
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Fil: Schwegler, Johannes. Universitat Erlangen-Nuremberg; Alemania
dc.description.fil
Fil: Schulz, Peter S.. Universitat Erlangen-Nuremberg; Alemania
dc.description.fil
Fil: Wasserscheid, Peter. Universitat Erlangen-Nuremberg; Alemania
dc.description.fil
Fil: Libuda, Joerg. Universitat Erlangen-Nuremberg; Alemania
dc.journal.title
Chemphyschem
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/cphc.201700843
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