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Single-molecule conductance in a unique cross-conjugated tetra(aminoaryl)ethene
Samara Medina Rivero1, Paloma García Arroyo2, Liang Li3
1Department of Physical Chemistry, University of Málaga, Andalucía-Tech, Campus de Teatinos s/n, Málaga 29071, Spain.
Abstract:
A 1,1,2,2-tetrakis(4-aminophenyl)ethene with three paths of π-conjugation, linear-cis, linear-trans and a cross-conjugation, has been prepared. The molecule is able to bind to gold electrodes forming molecular junctions for single-molecule conductance measurements. Only two regimes of conduction are found experimentally. The modelling of the conductance allows to assign them to through-bond transmission in the linear case, while the cross-conjugated channel is further assisted by through-space transmission, partially alleviating the destructive quantum interference.
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