独特的交叉共轭四（氨基芳基）乙烯中的单分子电导

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

作者信息

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

机构信息

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

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

出版信息

Chem Commun (Camb). 2021 Jan 21;57(5):591-594. doi: 10.1039/d0cc07124b.

DOI:10.1039/d0cc07124b

PMID:33325935

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.

摘要

一种具有线性顺式、线性反式和交叉共轭三种π共轭路径的1,1,2,2-四（4-氨基苯基）乙烯已被制备出来。该分子能够与金电极结合形成用于单分子电导测量的分子结。实验中仅发现两种传导机制。电导建模表明，在直线型情况下，它们可归因于通过化学键的传输，而交叉共轭通道则通过空间传输得到进一步辅助，部分缓解了破坏性量子干涉。