Supramolecular SelfâAssembly as a Tool To Preserve the Electronic Purity of Perylene Diimide Chromophores**
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jats:titleAbstract</jats:title>jats:pOrganic semiconductors are promising for efficient, printable optoelectronics. However, strong excitedâstate quenching due to uncontrolled aggregation limits their use in devices. We report on the selfâassembly of a supramolecular pseudoâcube formed from six perylene diimides (PDIs). The rigid, shapeâpersistent cage sets the distance and orientation of the PDIs and suppresses intramolecular rotations and vibrations, leading to nonâaggregated, monomerâlike 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 excitedâstate reservoir in a rare case of benign interâchromophore interactions in the cage. We show that selfâassembly provides a powerful tool for retaining and controlling the electronic properties of chromophores, and to bring molecular electronics devices within reach.</jats:p>
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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
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1521-3757
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European Research Council (695009)
Engineering and Physical Sciences Research Council (EP/P027067/1)
EPSRC (EP/T031603/1)