Synlett 2022; 33(08): 737-753
DOI: 10.1055/a-1740-7139
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Conjugated Nanohoops with Dibenzo[a,e]pentalenes as Nonalternant and Antiaromatic π-Systems

Birgit Esser
a   Institute of Organic Chemistry II and Advanced Materials, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany   URL: www.esserlab.com
b   Institute for Organic Chemistry, University of Freiburg, Albertstr. 21, 79104 Freiburg, Germany
c   Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 21, 79104 Freiburg, Germany
d   Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
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b   Institute for Organic Chemistry, University of Freiburg, Albertstr. 21, 79104 Freiburg, Germany
,
b   Institute for Organic Chemistry, University of Freiburg, Albertstr. 21, 79104 Freiburg, Germany
› Author Affiliations
Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – project numbers 230408635, 434040413 and INST 40/467-1 FUGG.


Abstract

Conjugated nanohoops are excellent as candidates for studying structure–property relationships, as optoelectronic materials, and as hosts for supramolecular chemistry. Whereas carbon nanohoops containing aromatics have been well studied, antiaromatic units had not been incorporated until our group recently did so, using dibenzo[a,e]pentalene (DBP). The nonalternant electronic character of the DBP units significantly influences the optoelectronic properties of such nanohoops. Here, we summarize our synthetic strategies toward DBP-containing nanohoops, together with their structural and electronic properties, chirality, and host–guest chemistry. We demonstrate how incorporating antiaromatic units leads to unique properties and opens new synthetic avenues, making such nanohoops attractive as potential electronic materials.

1 Introduction

2 Synthesis

3 Structural Properties

4 Electronic Properties

5 Chirality

6 Host–Guest Chemistry



Publication History

Received: 20 December 2021

Accepted after revision: 14 January 2022

Accepted Manuscript online:
14 January 2022

Article published online:
17 March 2022

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