Single-molecule conductance in a unique cross-conjugated tetra(aminoaryl)ethene

Samara Medina Rivero; Paloma García Arroyo; Liang Li; Suman Gunasekaran; Thijs Stuyver; María José Mancheño; Mercedes Alonso; Latha Venkataraman; José L. Segura; Juan Casado

doi:10.1039/D0CC07124B

Single-molecule conductance in a unique cross-conjugated tetra(aminoaryl)ethene†

Samara Medina Rivero,

^a Paloma García Arroyo,

^b Liang Li,

^c Suman Gunasekaran,^c Thijs Stuyver,

^d María José Mancheño,

^b Mercedes Alonso,

*^d Latha Venkataraman,

*^c José L. Segura

*^b and Juan Casado

*^a

Author affiliations

* Corresponding authors

^a Department of Physical Chemistry, University of Málaga, Andalucía-Tech, Campus de Teatinos s/n, Málaga 29071, Spain

^b Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madrid, Avenida Complutense, Madrid 28040, Spain

^c Department of Chemistry, Columbia University, New York 10027, USA

^d Eenheid Algemene Chemie (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels 1050, Belgium

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.

Chemical Communications

Single-molecule conductance in a unique cross-conjugated tetra(aminoaryl)ethene†

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Single-molecule conductance in a unique cross-conjugated tetra(aminoaryl)ethene

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