Effective Gating in Single-Molecule Junctions through Fano Resonances.

Autor:	Prindle CR; Department of Chemistry, Columbia University, New York, New York 10027, United States., Shi W; Department of Chemistry, Columbia University, New York, New York 10027, United States., Li L; Department of Chemistry, Columbia University, New York, New York 10027, United States., Dahl Jensen J; Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark., Laursen BW; Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark., Steigerwald ML; Department of Chemistry, Columbia University, New York, New York 10027, United States., Nuckolls C; Department of Chemistry, Columbia University, New York, New York 10027, United States., Venkataraman L; Department of Chemistry, Columbia University, New York, New York 10027, United States.; Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States.
Jazyk:	angličtina
Zdroj:	Journal of the American Chemical Society [J Am Chem Soc] 2024 Feb 14; Vol. 146 (6), pp. 3646-3650. Date of Electronic Publication: 2024 Jan 31.
DOI:	10.1021/jacs.3c14226
Abstrakt:	The successful incorporation of molecules as active circuit elements relies on the ability to tune their electronic properties through chemical design. A synthetic strategy that has been used to manipulate and gate circuit conductance involves attaching a pendant substituent along the molecular conduction pathway. However, such a chemical gate has not yet been shown to significantly modify conductance. Here, we report a novel series of triarylmethylium and triangulenium carbocations gated by different substituents coupled to the delocalized conducting orbitals on the molecular backbone through a Fano resonance. By changing the pendant substituents to modulate the position of the Fano resonance and its coupling to the conducting orbitals, we can regulate the junction conductance by a remarkable factor of 450. This work thus provides a new design principle to enable effective chemical gating of single-molecule devices toward effective molecular transistors.
Databáze:	MEDLINE
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