Simplifying the conductance profiles of molecular junctions: The use of the trimethylsilylethynyl moiety as a molecule-gold contact
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≡CSiMe 3 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.
Marques-Gonzalez, Santiago,Yufit, Dmitry S.,Howard, Judith A.K.,Martin, Santiago,Osorio, Henrry M.,Garcia-Suarez, Victor M.,Nichols, Richard J.,Higgins, Simon J.,Cea, Pilar,Low, Paul J.
p. 338 - 341
(2013/03/14)
An improved synthesis of 2-aryl-1,1-bis(trimethylsilyl)ethenes
A series of new 2-aryl-1,1-bis(trimethylsilyl)ethenes containing ortho-, meta-, and para-substituted aryl or heteroaryl groups has been efficiently synthesized using an improved two-step approach based on a silylative coupling cyclization-Heck coupling/Gr