KIT | KIT-Bibliothek | Impressum | Datenschutz

Structural origins of the cohesive energy in metal-terpyridine oligomer thin-films

Meded, Velimir 1; Knorr, Nikolaus; Neumann, Tobias 1; Nelles, Gabriele; Wenzel, Wolfgang 1; Wrochem, Florian von
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

FeII-terpyridine based oligomers have attracted considerable interest as key constituents for the realization of highly robust, ultra-thin ordered layers of metal center oligomers (MCOs) for organic electronics applications. By using molecular simulations and nanotribology investigations, we report on the origins of the surprisingly high mechanical and thermal stability in this type of MCO layers, which finds its expression in nanowear resistance values of up to 1.5 μN for the MCO films, as well as in a thermal stability of two-terminal MCO junctions to temperatures up to ∼100 °C under electrical load. A theoretical analysis of the fundamental cohesive forces among the constituents within the context of an electrostatic model reveal that the cohesive energy is essentially based on Coulomb interactions among the ionic constituents of the oligomers, leading to an estimated cohesive energy per molar mass of 0.0132 eV mol g−1 for MCO layers that advantageously compare to the 0.0061 eV mol g−1 reported for pentacene crystals.

Postprint §
DOI: 10.5445/IR/1000076154
Veröffentlicht am 16.01.2023
DOI: 10.1039/C7CP05488B
Zitationen: 2
Web of Science
Zitationen: 2
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 26.09.2017
Sprache Englisch
Identifikator ISSN: 1463-9076, 1463-9084
KITopen-ID: 1000076154
HGF-Programm 43.21.04 (POF III, LK 01) Molecular Engineering
Erschienen in Physical chemistry, chemical physics
Verlag Royal Society of Chemistry (RSC)
Band 19
Heft 41
Seiten 27952–27959
Nachgewiesen in Scopus
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page