Three-State Single-Molecule Naphthalenediimide Switch: Integration of a Pendant Redox Unit for Conductance Tuning

Li, Yonghai; Baghernejad, Masoud; Qusiy, Al-Galiby; Zsolt Manrique, David; Zhang, Guanxin; Hamill, Joseph; Fu, Yongchun; Broekmann, Peter; Hong, Wenjing; Wandlowski, Thomas; Zhang, Deqing; Lambert, Colin (2015). Three-State Single-Molecule Naphthalenediimide Switch: Integration of a Pendant Redox Unit for Conductance Tuning. Angewandte Chemie (International ed.), 54(46), pp. 13586-13589. Wiley-VCH 10.1002/anie.201506458

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We studied charge transport through core-substituted naphthalenediimide (NDI) single-molecule junctions using the electrochemical STM-based break-junction technique in combination with DFT calculations. Conductance switching among three well-defined states was demonstrated by electrochemically controlling the redox state of the pendent diimide unit of the molecule in an ionic liquid. The electrical conductances of the dianion and neutral states differ by more than one order of magnitude. The potential-dependence of the charge-transport characteristics of the NDI molecules was confirmed by DFT calculations, which account for electrochemical double-layer effects on the conductance of the NDI junctions. This study suggests that integration of a pendant redox unit with strong coupling to a molecular backbone enables the tuning of charge transport through single-molecule devices by controlling their redox states.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Baghernejad, Masoud; Hamill, Joseph; Fu, Yongchun; Broekmann, Peter; Hong, Wenjing and Wandlowski, Thomas

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry
500 Science

ISSN:

1433-7851

Publisher:

Wiley-VCH

Language:

English

Submitter:

Beatrice Niederhauser

Date Deposited:

02 Feb 2016 16:29

Last Modified:

02 Feb 2016 23:20

Publisher DOI:

10.1002/anie.201506458

BORIS DOI:

10.7892/boris.75077

URI:

https://boris.unibe.ch/id/eprint/75077

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