Organic linkers on oxide surfaces: Adsorption and chemical bonding of phthalic anhydride on MgO(100)

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Details zur Publikation

Autor(en): Mohr S, Döpper T, Xu T, Tariq Q, Lytken O, Laurin M, Steinrück HP, Görling A, Libuda J
Zeitschrift: Surface Science
Verlag: Elsevier
Jahr der Veröffentlichung: 2016
Band: 646
Seitenbereich: 90-100
ISSN: 0039-6028


Abstract


To elucidate the adsorption behavior and interaction mechanisms of organic linker units on oxide surfaces, we have performed a model study under ultrahigh vacuum (UHV) conditions. We apply infrared reflection absorption spectroscopy (IRAS) in combination with density-functional theory (DFT), temperature programmed desorption (TPD), and X-ray photoelectron spectroscopy (XPS). Phthalic anhydride (PM) was deposited at temperatures between 100 and 300 K by physical vapor deposition (PVD) onto an ordered MgO(100) film grown on Ag(100). At 100 K, the first monolayer adsorbs molecularly with the molecular plane aligned parallel to the surface. Subsequent growth of a multilayer film at low temperature also occurs with preferential molecular alignment parallel to the surface. At 240 K, the multilayer desorbs without decomposition. At 300 K, a mixed monolayer of chemically modified ring-opened and intact phthalic anhydride exists on the surface. The chemically modified species binds in a strongly tilted geometry via opening of the anhydride ring to form a bis-carboxylate species. This species additionally stabilizes the coadsorbed molecular PM via intermolecular interactions. Finally, surface defects and hydroxyl groups are found to increase the amount of surface bis-carboxylate at 300 K, whereas the relative amount of coadsorbed molecular PAA decreases. (C) 2015 Elsevier B.V. All rights reserved.



FAU-Autoren / FAU-Herausgeber

Döpper, Tibor
Lehrstuhl für Theoretische Chemie
Görling, Andreas Prof. Dr.
Lehrstuhl für Theoretische Chemie
Laurin, Mathias Dr.
Lehrstuhl für Physikalische Chemie II
Libuda, Jörg Prof. Dr.
Professur für Physikalische Chemie
Lytken, Ole
Lehrstuhl für Physikalische Chemie II
Mohr, Susanne
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Tariq, Quratulain
Lehrstuhl für Physikalische Chemie II
Xu, Tao
Professur für Physikalische Chemie


Zitierweisen

APA:
Mohr, S., Döpper, T., Xu, T., Tariq, Q., Lytken, O., Laurin, M.,... Libuda, J. (2016). Organic linkers on oxide surfaces: Adsorption and chemical bonding of phthalic anhydride on MgO(100). Surface Science, 646, 90-100. https://dx.doi.org/10.1016/jsusc.2015.06.027

MLA:
Mohr, Susanne, et al. "Organic linkers on oxide surfaces: Adsorption and chemical bonding of phthalic anhydride on MgO(100)." Surface Science 646 (2016): 90-100.

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Zuletzt aktualisiert 2018-26-06 um 21:23