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Verfasst von:Liu, Yangbiao [VerfasserIn]   i
 Sanjayan, Sajisha [VerfasserIn]   i
 Shoji, Yoshiaki [VerfasserIn]   i
 Fukushima, Takanori [VerfasserIn]   i
 Zharnikov, Michael [VerfasserIn]   i
Titel:Appearance of different conductance states in monomolecular films of ferrocene-decorated triptycene-based tripods
Verf.angabe:Yangbiao Liu, Sajisha Sanjayan, Yoshiaki Shoji, Takanori Fukushima and Michael Zharnikov
E-Jahr:2023
Jahr:21 December 2023
Umfang:9 S.
Illustrationen:Illustrationen
Fussnoten:Online veröffentlicht: 11. Dezember 2023 ; Gesehen am 03.07.2024
Titel Quelle:Enthalten in: The journal of physical chemistry. C, Energy, materials, and catalysis
Ort Quelle:Washington, DC : Soc., 2007
Jahr Quelle:2023
Band/Heft Quelle:127(2023), 50, Seite 24458-24466
ISSN Quelle:1932-7455
Abstract:Ferrocene (Fc) is a widely used building block of molecular rectifiers in the context of molecular electronics. Here, we studied the molecular organization and charge transport properties of the Fc-substituted, triptycene-based tripodes (Fc-Trip), assembled on Au(111) in the self-assembled monolayer-like fashion. The most intriguing property of this system is the occurrence of two distinctly different conductance states, high and low (HCS and LCS, respectively), which can be accessed dynamically by either asymmetric or symmetric bias sweeping in molecular junctions featuring bottom Au (substrate) and top EGaIn electrodes. For the asymmetric sweeping mode, the difference between these states results in an effective rectification ratio (RR) of similar to 400-600 at such a small bias as 0.1-0.2 V, which is in contrast to other Fc-based molecular rectifiers showing high RR at a bias of 1.0 V and higher. Following a literature model, the observed behavior was explained by bias-induced, nonreversible oxidation of the Fc groups in combination with conformational changes in the molecular film. The above results show that redox groups in ME systems, including metallocenes in particular, can exhibit a complex behavior that can only be observed by the variation of the sweeping mode and monitoring of individual sweeps.
DOI:doi:10.1021/acs.jpcc.3c06634
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.1021/acs.jpcc.3c06634
 Volltext: https://pubs.acs.org/doi/10.1021/acs.jpcc.3c06634
 DOI: https://doi.org/10.1021/acs.jpcc.3c06634
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:AU(111)
 CHARGE-TRANSPORT
 ELECTRONICS
 K-SHELL EXCITATION
 MOLECULAR DIODES
 RECTIFICATION
 SELF-ASSEMBLED MONOLAYERS
 SPECTRA
 SPECTROSCOPY
 SURFACES
K10plus-PPN:1893556182
Verknüpfungen:→ Zeitschrift

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