Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 41, Pages 14344-14347Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b06400
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Funding
- National Key R&D Program of China [2017YFA0204902]
- National Natural Science Foundation of China [21673195, 21503179, 21490573]
- Young Thousand Talent Project of China
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To explore the charge transport through metalla-aromatics building blocks, three metallacycles complexes were synthesized, and their single-molecule conductances were characterized by using mechanically controllable break junction technique. It is found that the conductance of the metallacycles junction with phosphonium group is more than 1 order of magnitude higher than that without phosphonium group. X-ray diffraction and UV-vis absorption spectroscopy suggested that the attached phosphonium group makes metallacycles more delocalized, which shortened the preferred, charge traps: port pathway and significantly enhanced the single molecule conductance. This work revealed that the delocalization of metalla-aromatics could be used to switch the charge transport pathway of single-molecule junctions and thus tune the charge transport abilities significantly.
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