Nanographenes Out of Planarity

Abstract

The combination of different distortion motifs in nanographenes and polycyclic conjugated hydrocarbons has been the focus of significant attention during the last decade. The continual discovery of multiple carbon allotropes has fueled the field. A plethora of research groups around the globe are engaged in developing methods for the preparation of discrete graphene or fullerene fragments and new carbon allotropes. The goal is to fully understand the structure–property relationships in these systems. Herein, we present our journey and contributions to the field, from the development of a synthetic methodology towards functionalized heptagon-containing hexa-peri-hexabenzocoronenes through the preparation of saddle-helix hybrid nanographenes, the study of heptagon-containing cumulenic and open-shell systems, nanographenes embedded with higher order carbocycles, and the study of their electronic properties on-surface and by single-molecule conductance.

1 Introduction

2 The Finding of a Cornerstone Scaffold

3 Saddle-Helix Hybrid Nanographenes

4 Cumulenic and Diradicaloid Systems

5 Supramolecular Studies

6 Octagon- and Nonagon-Embedded Nanographenes

7 Molecular Electronics and On-Surface Studies

8 Outlook

Key words

nanographenes - helicenes - curved polyaromatic hydrocarbons - chiroptical properties - molecular electronics

Publication History

Received: 08 July 2023

Accepted after revision: 04 September 2023

Accepted Manuscript online:
04 September 2023

Article published online:
24 October 2023

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