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Single-molecule conductance of a chemically modified, π-extended tetrathiafulvalene and its charge-transfer complex with F4TCNQ

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García, Raúl and Herranz, M.Angeles and Leary, Edmund and González, M.Teresa and Rubio Bollinger, Gabino and Bürkle, Marius and Zotti, Linda A. and Asai, Yoshihiro and Pauly, Fabian and Cuevas, Juan Carlos and Agrait, Nicolás and Martín, Nazario (2015) Single-molecule conductance of a chemically modified, π-extended tetrathiafulvalene and its charge-transfer complex with F4TCNQ. Belstein journal of organic chemistry, 11 . pp. 1068-1078. ISSN 1860-5397

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Official URL: https://www.beilstein-journals.org/bjoc/single/articleFullText.htm?publicId=1860-5397-11-120



Abstract

We describe the synthesis and single-molecule electrical transport properties of a molecular wire containing a π-extended tetrathiafulvalene (exTTF) group and its charge-transfer complex with F4TCNQ. We form single-molecule junctions using the in situ break junction technique using a homebuilt scanning tunneling microscope with a range of conductance between 10 G0 down to 10−7 G0 .Within this range we do not observe a clear conductance signature of the neutral parent molecule, suggesting either that its conductance is too low or that it does not form a stable junction. Conversely, we do find a clear conductance signature in the experiments carried out on the charge-transfer complex. Due to the fact we expected this species to have a higher conductance than the neutral molecule, we believe this supports the idea that the conductance of the neutral molecule is very low, below our measurement sensitivity. This idea is further supported by theoretical calculations. To the best of our knowledge, these are the first reported singlemolecule conductance measurements on a molecular charge-transfer species


Item Type:Article
Uncontrolled Keywords:break junction measurements; charge-transfer complex; DFT-based transport; molecular electronics; tetrathiafulvalene
Subjects:Sciences > Chemistry > Chemistry, Organic
ID Code:35960
Deposited On:25 Feb 2016 16:25
Last Modified:10 Aug 2016 09:03

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