Interplay of structure and photophysics of individualized rod-shaped graphene quantum dots with up to 132 sp² carbon atoms

Daniel Medina-Lopez, Thomas Liu, Silvio Osella, Hugo Levy-Falk, Nicolas Rolland, Christine Elias, Gaspard Huber, Pranav Ticku, Loïc Rondin, Bruno Jousselme, David Beljonne, Jean-Sébastien Lauret () and Stephane Campidelli ()
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Daniel Medina-Lopez: Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN
Thomas Liu: Université Paris-Saclay, CNRS, ENS Paris-Saclay, CentraleSupélec, LuMIn
Silvio Osella: University of Warsaw
Hugo Levy-Falk: Université Paris-Saclay, CNRS, ENS Paris-Saclay, CentraleSupélec, LuMIn
Nicolas Rolland: University of Mons
Christine Elias: Université Paris-Saclay, CNRS, ENS Paris-Saclay, CentraleSupélec, LuMIn
Gaspard Huber: Université Paris-Saclay, CEA, CNRS, NIMBE, LSDRM
Pranav Ticku: Université Paris-Saclay, CNRS, ENS Paris-Saclay, CentraleSupélec, LuMIn
Loïc Rondin: Université Paris-Saclay, CNRS, ENS Paris-Saclay, CentraleSupélec, LuMIn
Bruno Jousselme: Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN
David Beljonne: University of Mons
Jean-Sébastien Lauret: Université Paris-Saclay, CNRS, ENS Paris-Saclay, CentraleSupélec, LuMIn
Stephane Campidelli: Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Nanographene materials are promising building blocks for the growing field of low-dimensional materials for optics, electronics and biophotonics applications. In particular, bottom-up synthesized 0D graphene quantum dots show great potential as single quantum emitters. To fully exploit their exciting properties, the graphene quantum dots must be of high purity; the key parameter for efficient purification being the solubility of the starting materials. Here, we report the synthesis of a family of highly soluble and easily processable rod-shaped graphene quantum dots with fluorescence quantum yields up to 94%. This is uncommon for a red emission. The high solubility is directly related to the design of the structure, allowing for an accurate description of the photophysical properties of the graphene quantum dots both in solution and at the single molecule level. These photophysical properties were fully predicted by quantum-chemical calculations.

Date: 2023
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DOI: 10.1038/s41467-023-40376-w

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