Simplifying the conductance profiles of molecular junctions: The use of the trimethylsilylethynyl moiety as a molecule-gold contact

S. Marqués-González, D.S. Yufit, J.A.K. Howard, S. Martín, H.M. Osorio, V.M. García-Suárez, R.J. Nichols, S.J. Higgins, P. Cea, Paul Low

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Abstract

Conductance across a metal|molecule|metal junction is strongly influenced by the molecule–substrate contacts, and for a given molecular structure, multiple conductance values are frequently observed and ascribed to distinct binding modes of the contact at each of the molecular termini. Conjugated molecules containing a trimethylsilylethynyl terminus, –C[triple bond, length as m-dash]CSiMe3 give exclusively a single conductance value in I(s) measurements on gold substrates, the value of which is similar to that observed for the same molecular backbone with thiol and amine based contacting groups when bound to under-coordinated surface sites.
Original languageEnglish
Pages (from-to)338–341
JournalDalton Transactions
Volume42
Issue number2
Early online date29 Oct 2012
DOIs
Publication statusPublished - 14 Jan 2013

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