Article (Scientific journals)
Stability of functionalized platform molecules on Au(111)
Jasper-Tönnies, Torben; Poltavskyi, Igor; Ulrich, Sandra et al.
2018In Journal of Chemical Physics, 149, p. 8
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Abstract :
[en] Trioxatriangulenium (TOTA) platform molecules were functionalized with methyl, ethyl, ethynyl, propynyl, and hydrogen and sublimated onto Au(111) surfaces. Low-temperature scanning tunneling microscopy data reveal that >99% of ethyl-TOTA and methyl-TOTA remain intact, whereas 60% of H-TOTA and >99% of propynyl-TOTA and ethynyl-TOTA decompose. The observed tendency toward fragmentation on Au(111) is opposite to the sequence of gas-phase stabilities of the molecules. Although Au(111) is the noblest of all metal surfaces, the binding energies of the decomposition products to Au(111) destabilize the functionalized platforms by 2 to 3.9 eV (190–370 kJ/mol) and even render some of them unstable as revealed by density functional theory calculations. Van der Waals forces are important, as they drive the adsorption of the platform molecules.
Disciplines :
Physics
Author, co-author :
Jasper-Tönnies, Torben
Poltavskyi, Igor ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Ulrich, Sandra
Moje, Tobias
Tkatchenko, Alexandre ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Herges, Rainer
Berndt, Richard
External co-authors :
yes
Language :
English
Title :
Stability of functionalized platform molecules on Au(111)
Publication date :
27 December 2018
Journal title :
Journal of Chemical Physics
ISSN :
1089-7690
Publisher :
American Institute of Physics, New York, United States - New York
Volume :
149
Pages :
8
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
FnR Project :
FNR11360857 - Quantum Ion Tunneling And Scattering In Layered Nanomaterials, 2016 (01/03/2017-28/02/2020) - Alexandre Tkatchenko
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