Surface propensity of anions in a binary ionic‐liquid mixture assessed by full‐range angle‐resolved X‐ray photoelectron spectroscopy and surface‐tension measurements

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buir.contributor.authorÖz, Erdinç
buir.contributor.authorŞahin, Özgür
buir.contributor.authorOkur, Halil İ.
buir.contributor.authorSüzer, Şefik
dc.citation.epage2401en_US
dc.citation.issueNumber21en_US
dc.citation.spage2397en_US
dc.citation.volumeNumber21en_US
dc.contributor.authorÖz, Erdinç
dc.contributor.authorŞahin, Özgür
dc.contributor.authorOkur, Halil İ.
dc.contributor.authorSüzer, Şefik
dc.date.accessioned2021-02-28T21:02:00Z
dc.date.available2021-02-28T21:02:00Z
dc.date.issued2020en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractAngle‐resolved X‐ray photoelectron spectroscopy and contact‐angle measurements guided by a signal attenuation model are utilized to extract molar composition and anion enrichment in the vacuum interface of a binary ionic liquid mixture, having a common quaternary ammonium cation and two different anions. By using the intensity ratio of the F1s peaks belonging to the two different anions recorded at the full electron take‐off angle range, from 0° to 80°, we have determined that only a fractionally covered and anion enriched surface layer can predict the AR‐XPS data, which is also consistent with surface tension measurements. Moreover, the more bulky and non‐spherical anion enrichment is evident even at the conventional and the so assumed bulk sensitive take‐off angle of 0°. This methodology provides a surface enrichment factor of the molecular ions and clearly serves as an experimental evidence for recently debated surface layering and/or island structure in ionic liquid systems.en_US
dc.description.provenanceSubmitted by Evrim Ergin (eergin@bilkent.edu.tr) on 2021-02-28T21:02:00Z No. of bitstreams: 1 Surface_propensity_of_anions_in_a_binary_ionic‐liquid_mixture_assessed_by_Full‐Range_angle‐resolved_X‐ray_photoelectron_spectroscopy_and_surface‐tension_measurements.pdf: 624627 bytes, checksum: f8728f7df6b35aacc0124770302490e8 (MD5)en
dc.description.provenanceMade available in DSpace on 2021-02-28T21:02:00Z (GMT). No. of bitstreams: 1 Surface_propensity_of_anions_in_a_binary_ionic‐liquid_mixture_assessed_by_Full‐Range_angle‐resolved_X‐ray_photoelectron_spectroscopy_and_surface‐tension_measurements.pdf: 624627 bytes, checksum: f8728f7df6b35aacc0124770302490e8 (MD5) Previous issue date: 2020-11en
dc.embargo.release2021-11-05
dc.identifier.doi10.1002/cphc.202000750en_US
dc.identifier.issn1439-4235
dc.identifier.urihttp://hdl.handle.net/11693/75651
dc.language.isoEnglishen_US
dc.publisherWiley-VCH Verlagen_US
dc.relation.isversionofhttps://dx.doi.org/10.1002/cphc.202000750en_US
dc.source.titleChemPhysChemen_US
dc.subjectAngle-resolved XPSen_US
dc.subjectAttenuation modelen_US
dc.subjectIonic liquid mixturesen_US
dc.subjectSurface enrichmenten_US
dc.subjectSurface tensionen_US
dc.titleSurface propensity of anions in a binary ionic‐liquid mixture assessed by full‐range angle‐resolved X‐ray photoelectron spectroscopy and surface‐tension measurementsen_US
dc.typeArticleen_US

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