期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 31, 页码 10820-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja903731m
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资金
- NSF-NSEC [CHE-0641523]
- NYSTAR
- Columbia University
- DOE [DE-AC02-98CH10886]
- NSF [CHE-0744185]
- ACS PRF
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0744185] Funding Source: National Science Foundation
We compare the conductance of 1,4-bis(methylthio)benzene with that of 2,3,6,7-tetrahydrobenzo[1,2-b:4,5-b']dithiophene and the conductance of 1,4-bis(methylseleno)benzene with that of 2,3,6,7-tetrahydrobenzo[1,2-b:4,5-b']diselenophene and show explicitly that the orientation of an Au-S or Au-Se bond relative to the aromatic TT system controls electron transport through conjugated molecules. Specifically, we have found that the conduction pathway connects the Au electrodes to the aromatic pi-system via the chalcogen p lone pairs, and greater overlaps among these components lead to higher conductivity through the molecular junction.
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