Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)


Accueil > La Recherche > Axes & Equipes > Nanostructures & Spectroscopies > Equipe : Nanomatériaux > Thème : Elaboration et étude de réseaux, films et composites à base de nanotubes

Physical properties of geodesic polyarenes

par Sébastien LAYSSAC - publié le , mis à jour le

Involved researchers : R. Le Parc, L. Alvarez, J.L. Bantignies, S. Dennler, V. Jourdain
collaboration Pr L.T. Scott, Boston College

In collaboration with the team of the Pr L.T.Scott from Boston College, we are studying a new class of carbon-based molecules belonging to the family of Polycyclic Aromatic Hydrocarbons (PAHs). The particularity of these molecules is their bowl shape, an interesting departure point for the controlled synthesis of carbon nanotubes, which is one aim of the group of Pr L.T. Scott. Different molecules can exhibit different curvatures depending on the number and the repartition of 5 and 6 carbon rings. Pentaindenocorannulene, for example, shows a curvature surpassing that of the C60 fullerene whereas corannulene shows a smaller bowl depth.
Our interest in these nanostructures is the understanding of the relationships between their structure, their curvature and their physical properties. These molecules can form molecular crystals in which, depending on their curvature and their size, molecules assemble either in columns via p -p interaction or without stacking. We are particularly interested in the vibrational properties (IR, Raman, INS) which can reflect both intramolecular and intermolecular interactions. For a better understanding, we also attempt to tune these interactions by varying the applied hydrostatic pressure on crystalline samples.

Vibrational modes in a corannulene lattice - © L2C