Carbon nanomaterials

Carbon nanomaterials (fullerenes, carbon nanotubes, graphene, etc) are subjects of intense research due to their excellent electronic and optical properties. Our research aims at synthesizing carbon nanomaterials using two strategies: 1) the solution-phase, bottom-up synthesis using the the modern tools of organic synthesis, especially photochemistry and 2) the transformation of well-organized carbon-rich precursors in the solid state using physical stimuli (light or heat).

Synthesis of nanographenes and graphene nanoribbons (GNRs)

In this approach, we prepare the bottom-up, solution-phase synthesis of polychlorinated polyphenylenes that undergo a photochemical cyclodehydrochlorination (CDHC) reaction to provide well-defined graphene nanoribbons (GNRs). The CDHC reaction takes place in metal-free, mild reaction conditions and proceeds selectively without the formation of side-products. Moreover, the CDHC reaction is compatible with different heterocycles and provides better control over the edge configuration of nanographenes than the Scholl reaction. Using this approach, we have been able to prepare nanographenes (Angew. Chem. Int. Ed. 2016, 55, 2042), helical GNRs (Angew. Chem. Int. Ed. 2017, 56, 6213) and thiophene-edged GNRs (Angew. Chem. Int. Ed. 2018, 130, 3650.)TOC_AngewChem.001

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Synthesis of carbon nanoparticles of different sizes and shapes from acetylene precursors

img_recherche_nanomateriauxdecarbone

Nanotubes

To obtain nanotubes, we synthesize and self-assemble phenylacetylene macrocycles (PAM) that we irradiate to provide covalently-linked stable assemblies.

 

JACS 2013, 135, 110.
OrgBiomolChem 2011, 9, 4440.
JMaterChemC 2013, 1, 2680.
ChemComm 2013, 49, 9546.

In addition to nanotubes, we use this approach to prepare other nanoarchitectures such as nanoparticles (ChemComm 2012, 48, 10144), nanorods (Langmuir 2013, 29, 3446) and 2D layered materials (Chem. Sci. 2014, 5, 831).

Graphene nanoribbons (GNRs)

Recently, we have also been interested in the total synthesis of carbon nanomaterials.