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Supramolecular Self-Assembly as a Tool To Preserve the Electronic Purity of Perylene Diimide Chromophores.

Published version
Peer-reviewed

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Abstract

Organic semiconductors are promising for efficient, printable optoelectronics. However, strong excited-state quenching due to uncontrolled aggregation limits their use in devices. We report on the self-assembly of a supramolecular pseudo-cube formed from six perylene diimides (PDIs). The rigid, shape-persistent cage sets the distance and orientation of the PDIs and suppresses intramolecular rotations and vibrations, leading to non-aggregated, monomer-like properties in solution and the solid state, in contrast to the fast fluorescence quenching in the free ligand. The stabilized excited state and electronic purity in the cage enables the observation of delayed fluorescence due to a bright excited multimer, acting as excited-state reservoir in a rare case of benign inter-chromophore interactions in the cage. We show that self-assembly provides a powerful tool for retaining and controlling the electronic properties of chromophores, and to bring molecular electronics devices within reach.

Description

Funder: Studienstiftung des Deutschen Volkes; Id: http://dx.doi.org/10.13039/501100004350


Funder: Winton Programme for the Physics of Sustainability


Funder: Rowland Institute at Harvard; Id: http://dx.doi.org/10.13039/100009835

Keywords

Metal-Organic Cage, Molecular Electronics, Photophysics, Supramolecular Chemistry

Journal Title

Angew Chem Int Ed Engl

Conference Name

Journal ISSN

1433-7851
1521-3773

Volume Title

Publisher

Wiley
Sponsorship
European Research Council (670405)
European Research Council (695009)
Engineering and Physical Sciences Research Council (EP/P027067/1)
EPSRC (EP/T031603/1)
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