Issue 14, 2019

Long rylene nanoribbons express polyacetylene-like signatures at their edges

Abstract

Oligorylenes have been the focus of research during the journey toward intrinsically conducting polyrylene. Recently, the description of diradicaloid and tetraradicaloid properties in long oligorylene molecules has revived the old question about their electronic structures which is of current interest in the context of the properties of graphene nanoribbons. Here we show that the armchair edges of smaller oligorylenes are embedded within aromatic units and they transform into armchair cis-polyacetylenic structures for octarylene and longer. Concomitantly, the short zig-zag edges of oligorylenes stabilize diradicaloid and multiradical states. This electronic transformation is proved experimentally by Raman spectroscopy and supported by theoretical modelling.

Graphical abstract: Long rylene nanoribbons express polyacetylene-like signatures at their edges

Supplementary files

Article information

Article type
Paper
Submitted
03 Feb 2019
Accepted
01 Mar 2019
First published
02 Mar 2019

Phys. Chem. Chem. Phys., 2019,21, 7281-7287

Long rylene nanoribbons express polyacetylene-like signatures at their edges

S. Medina Rivero, S. Canola, W. Zeng, F. J. Ramírez, J. L. Zafra, J. Wu, F. Negri and J. Casado, Phys. Chem. Chem. Phys., 2019, 21, 7281 DOI: 10.1039/C9CP00679F

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