Isophorone on Au/MgO/Ag(001) : Physisorption with Electrostatic Site Selection
Nevalaita, J., Häkkinen, H., & Honkala, K. (2017). Isophorone on Au/MgO/Ag(001) : Physisorption with Electrostatic Site Selection. Journal of Physical Chemistry C, 121(20), 10824-10831. https://doi.org/10.1021/acs.jpcc.6b12004
Published inJournal of Physical Chemistry C
© 2017 American Chemical Society. This is a final draft version of an article whose final and definitive form has been published by ACS. Published in this repository with the kind permission of the publisher.
We report a computational study of isophorone C9H14O adsorption on a Ag(001)-supported ultrathin MgO film with Au adatoms and clusters employing density functional theory calculations. The calculations show that the keto form of isophorone is more stable than the enol tautomers both in gas phase and on the MgO/Ag(001) surface. The interaction between the keto isophorone and step and terrace sites of MgO/Ag(001) displays long interaction distances, relatively weakly exothermic adsorption energies, lack of charge transfer, and minor changes in the density of states, all of which indicate that the molecule merely physisorbs on the surface. The step sites are energetically preferred adsorption sites due to attractive electrostatic interaction between more exposed Mg2+ cations and the polar O=C bond in isophorone. The adsorption on the step sites is 0.6 to 0.8 eV more exothermic compared with terrace sites. The calculations suggest that isophorone can chemisorb on MgO/Ag(001) surface but requires the presence of O vacancy. The interaction between a Au atom and isophorone was studied both in vacuum and on the MgO/Ag(001) terrace. In vacuum calculations, we did not find chemical bonding between an anionic, cationic, or neutral Au atom and the keto species. On the MgO/Ag(001) surface, a negatively charged Au adatom repels the keto isophorone, while electrostatic attraction is observed with the enol form. The calculations employing a Au stripe supported by MgO/Ag(001) to mimic the edge of the 2D Au nanoisland show that keto isophorone physisorbs at the edge and on-top of a Au stripe. The enol isophorone demonstrates adsorption site selectivity to the edge of the stripe due to electrostatic attraction between the negatively charged cluster edge and the positive end of the polar H–O bond, which makes physisorption on the Au edge energetically preferred. ...
PublisherAmerican Chemical Society
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
Effect of organic matrix on the adsorption of selected antibiotics and antiretroviral drugs from drinking water onto activated carbon Ilomäki, Johannes (2023)Luonnollisen orgaanisen aineksen (NOM) määrä pintavesistöissä on kasvanut, minkä lisäksi niissä on havaittu ympäristölle haitallisia lääkeainejäämiä. Kun suuri osa Suomenkin juomavedestä on peräisin pintavesilähteistä, ...
Khariushin, Ivan, V.; Ovsyannikov, Alexander, S.; Baudron, Stéphane, A.; Ward, Jas, S.; Kiesilä, Anniina; Rissanen, Kari; Kalenius, Elina; Kovalenko, Konstantin, A.; Fedin, Vladimir, P.; Solovieva, Svetlana, E.; Antipin, Igor, S.; Bulach, Véronique; Ferlay, Sylvie (Royal Society of Chemistry (RSC), 2022)Giant octahedral M32 coordination cages were prepared via self-assembly of sulfonylcalixarene-supported tetranuclear M(II) clusters (M = Co, Ni) with hybrid linker based on tris(dipyrrinato)cobalt(III) complexes appended ...
Kelly, S.; Campbell, P.; Cheal, B.; Eronen, Tommi; Geldhof, Sarina; Jokinen, Ari; Moore, Iain; Penttilä, Heikki; Pohjalainen, Ilkka; Rinta-Antila, Sami; Sonnenschein, Volker; Voss, Annika (Springer, 2017)A compact electrostatic trap has been designed and installed as part of the recent upgrades to the IGISOL IV facility. The ConeTrap provides an in vacuo optical pumping site for low energy (800 eV) ionic ensembles available ...
Tapio, Kosti (University of Jyväskylä, 2017)In this thesis DNA based structures were utilized to create gold nanostructures for nanosensing and nanoelectronic applications. In the past, both of these ﬁelds have been dominated by the conventional lithography methods, ...
Praks,J.; Mughal, M. Rizwan; Vainio, R.; Janhunen, P.; Envall, J.; Oleynik, P.; Näsilä, A.; Leppinen, H.; Niemelä, P.; Slavinskis, A.; Gieseler, J.; Toivanen, P.; Tikka, T.; Peltola, T.; Bosser, A.; Schwarzkopf, G.; Jovanovic, N.; Riwanto, B.; Kestilä, A.; Punkkinen, A.; Punkkinen, R.; Hedman, H.-P.; Säntti, T.; Lill, J.-O.; Slotte, J.M.K.; Kettunen, H.; Virtanen, A. (Elsevier, 2021)The design, integration, testing and launch of the first Finnish satellite Aalto-1 is briefly presented in this paper. Aalto-1, a three-unit CubeSat, launched into Sun-synchronous polar orbit at an altitude of approximately ...