ANGLE-RESOLVED X-RAY PHOTOELECTRON SPECTROSCOPY STUDY OF THE THIOUREA DERIVATIVE ADSORPTION ON AU(111) FROM ETHANOLIC SOLUTION.
The adsorption of 1-(2-Furoyl)-3-[3-(trifluoromethyl)phenyl] thiourea on Au(111) from ethanolic solution, was studied by means of angle-resolved X-ray photoelectron spectroscopy (ARXPS). The AR-XPS spectra were obtained at different take-off angles with respect to substrate surface: (50°, 70°, 90° a...
| Publicado en: | Revista Cubana de Física Vol. 34; no. 2; pp. 108 - 112 |
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| Autores principales: | , , , |
| Formato: | Artículo |
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Universidad de La Habana
dic2017
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=lth&AN=133743937&site=ehost-live header: @attributes: shortDbName: lth uiTerm: 133743937 longDbName: MedicLatina uiTag: AN controlInfo: bkinfo: jinfo: jid: 02539268 UEW jtl: Revista Cubana de Física issn: 02539268 maglogo: N pubinfo: dt: dic2017 vid: 34 iid: 2 pid: 21208 pub: Universidad de La Habana artinfo: ui: 133743937 ppf: 108 ppct: 4 formats: fmt: @attributes: type: P size: 3MB tig: atl: ANGLE-RESOLVED X-RAY PHOTOELECTRON SPECTROSCOPY STUDY OF THE THIOUREA DERIVATIVE ADSORPTION ON AU(111) FROM ETHANOLIC SOLUTION. aug: au: HERNÁNDEZ, M. P. NAVARRO-MARÍN, G. ESTÉVEZ-HERNÁNDEZ, O. FARÍAS-SÁNCHEZ, M. H. affil: Instituto de Ciencia y Tecnología de Materiales (IMRE), Universidad de La Habana, Zapata y G, Plaza de la Revolución, La Habana 10400, Cuba Centro de Nanociencias y Nanotecnología (CNyN), Universidad de Nacional Autónoma de México (UNAM), km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California 22860, México su: Thiourea X-ray photoelectron spectroscopy Adsorption (Chemistry) Ethanol Gold isotopes Fluorine Fluorides sug: subj: Thiourea X-ray photoelectron spectroscopy Adsorption (Chemistry) Ethanol Gold isotopes Fluorine Fluorides ab: The adsorption of 1-(2-Furoyl)-3-[3-(trifluoromethyl)phenyl] thiourea on Au(111) from ethanolic solution, was studied by means of angle-resolved X-ray photoelectron spectroscopy (ARXPS). The AR-XPS spectra were obtained at different take-off angles with respect to substrate surface: (50°, 70°, 90° and 110°). The spectra of the C1s at different take-off angles indicated the degradation of the CF in CF and CF entities. This degradation is due to damages provoked for the effect of the electrons induced by X-ray excitation. High resolution spectra of F1s at these angles, showed two peaks at 687.6 and 688.4 eV, confirming the presence of the organic fluorine (-F-C-) and inorganic fluoride (F). The X-ray-photoelectron angular measurements were capable of yielding thickness-to-mean free path ratios for the adsorbed layer. Despite of the fluorine lost, such measurements demonstrate the permanence of the CF groups in the meta-phenyl position at 10 Å of the inorganic fluoride. A preferential orientation of the species (CF) at 50° respect to the substrate's surface was observed. La adsorción de 1-(2-Furoil)-3-[3-(trifluorometil)fenil]tiourea sobre Au(111) en una disolución etanólica, se estudió mediante la distribución angular de fotoelectrones de rayos X (AR-XPS). Los espectros de AR-XPS se obtuvieron a diferentes ángulos de detección con respecto a la superficie del sustrato: 50°, 70°, 90° y 110°. En los espectros angulares de C1s se observa la degradación del grupo CF en las especies CF2 y CF. Esta degradación es provocada por el efecto de los electrones inducidos por la excitación de los rayos X. Los espectros de alta resolución de F1s en estos ángulos, mostraron dos picos a 687,6 y 688,4 eV, confirmando la presencia de flúor orgánico (-F-C-) y flúor inorgánico (F). Las mediciones angulares de fotoelectrones permitieron determinar la relación entre el espesor de la capa de moléculas y el recorrido libre medio de los electrones en la capa adsorbida. A pesar de las pérdidas de flúor, tales mediciones demostraron que los grupos CF permanecen en la posición meta del anillo bencénico a una distancia 10 Å del flúor inorgánico. Las especies (CF) mostraron una orientación preferencial a 50° respecto a la superficie del sustrato pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y custom: Copyright of Revista Cubana de Física is the property of Universidad de La Habana and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. item: Revista Cubana de Física holder: Universidad de La Habana dt: @attributes: year: 2017 holdings: @attributes: islocal: N |
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