Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 42, Pages 13061-13065Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201707710
Keywords
charge transport; electric conductance; molecular electronics; radical cations; single-molecule junctions
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Funding
- National Key R&D Program of China [2017YFA0204902]
- NSFC [21673195]
- Young Thousand Talent Project
- EC ITN MOLESCO [606728]
- UK EPSRC [EP/K0394/23/1, EP/N017188/1, EP/M014452/1]
- EPSRC [EP/J015067/1, EP/N017188/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J015067/1, EP/N017188/1] Funding Source: researchfish
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We studied the single-molecule conductance through an acid oxidant triggered phenothiazine (PTZ-) based radical junction using the mechanically controllable break junction technique. The electrical conductance of the radical state was enhanced by up to 200 times compared to the neutral state, with high stability lasting for at least two months and high junction formation probability at room-temperature. Theoretical studies revealed that the conductance increase is due to a significant decrease of the HOMO-LUMO gap and also the enhanced transmission close to the HOMO orbital when the radical forms. The large conductance enhancement induced by the formation of the stable PTZ radical molecule will lead to promising applications in single-molecule electronics and spintronics.
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