Univ. Paris-Saclay

Service de Physique de l'Etat Condensé

Synthèse par "Click-Chemistry des Matériaux hybrides et études de leurs assemblages moléculaires"
Jeudi 15/11/2012, 13:30
SPEC Salle Itzykson, Bât.774, Orme des Merisiers

An approach "bottom-up" via molecular self-assembly is considered as a promising way to control the manufacture of new materials and their integration into hybrid devices with novel properties. In this work, we have synthesized several hybrids based on organic molecules (fullerene, porphyrin, phthalocyanine), and oligonucleotides.

At first, we were interested in the synthesis of a new family of products consisting of a unit C60 linked to two chromophores positioned face to face and allowing the formation of host-guest complexes. We have shown that these compounds are combined to give supramolecular structures in solution and on the surface. Electronic interactions and complexation between fullerene and the two chromophores (porphyrins and phthalocyanines) were studied by NMR and optical spectroscopy as well as cyclic voltammetry.

Among the tools of the "bottom-up", DNA showed its tremendous potential for the production of bio-directed assembly. Indeed, the synthesis of hybrid materials based DNA allows precise control (theoretically on the scale of a base, ~ 3.4 Å) of the positioning of the functional groups in a material. In order to form networks and bi-dimensional DNA-based for positioning nano-objects, in a last part, we have synthesized hybrid based on oligonucleotides and porphyrin molecule (2D) or adamantane molecule (3D). Supramolecular structures have been made and this work is ongoing to achieve functional networks.

Contact : Sawako NAKAMAE


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