Adsorption of Phosphonic-Acid-Functionalized Porphyrin Molecules on TiO2(110)

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Fernández CC, Wechsler D, Rocha TC, Steinrück HP, Lytken O, Williams FJ
Zeitschrift: Journal of Physical Chemistry C
Jahr der Veröffentlichung: 2019
ISSN: 1932-7447
eISSN: 1932-7455


Abstract

We studied the adsorption geometry and bonding of mono- and tetraphosphonic-acid-functionalized tetraphenylporphyrin molecules on rutile TiO
2
(110) surfaces. The investigation was carried out by means of X-ray photoelectron spectroscopy and near edge X-ray absorption fine structure (NEXAFS) measurements. We found that the molecules bind covalently to the surface in a mixed monodentate and bidentate mode implying deprotonation of one or two phosphonate hydroxyl groups. Our NEXAFS data suggest that molecules containing one functional phosphonic acid group are on average tilted further away from the surface than molecules with four functional groups. The highest occupied electronic state of both molecules is in the band gap at 2.1 eV below the Fermi level. Our results demonstrate that the number of functional phosphonic acid groups determine the adsorption geometry of tetraphenylporphyrins.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Lytken, Ole
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Wechsler, Daniel
Lehrstuhl für Physikalische Chemie II


Einrichtungen weiterer Autorinnen und Autoren

Centro Nacional de Pesquisa em Energia e Materiais (CNPEM)
Universidad de Buenos Aires (UBA) / University of Buenos Aires


Zitierweisen

APA:
Fernández, C.C., Wechsler, D., Rocha, T.C., Steinrück, H.-P., Lytken, O., & Williams, F.J. (2019). Adsorption of Phosphonic-Acid-Functionalized Porphyrin Molecules on TiO2(110). Journal of Physical Chemistry C. https://dx.doi.org/10.1021/acs.jpcc.9b01019

MLA:
Fernández, Cynthia C., et al. "Adsorption of Phosphonic-Acid-Functionalized Porphyrin Molecules on TiO2(110)." Journal of Physical Chemistry C (2019).

BibTeX: 

Zuletzt aktualisiert 2019-24-05 um 09:50