Supramolecular coordination-driven assemblies of π-conjugated systems: nanosize π-stacked rectangles

Supramolecular chemistry, self-assembling processes, and noncovalent interactions are powerful tools to synthesize complex molecular architectures from simple constituents. We have developed unique molecular clips, the Cu(I)-dimmers (1) bearing a bridging phosphine ligand, which react with ditopic conjugated ligands affording nanosize supramolecular rectangles (2). Due to the short Cu(I)-Cu(I) distance of these molecular clips, the π-walls of these rectangles are forced to participate into noncovalent interactions (π-π stacking). On other words, molecular clips (1) allow the self-assembly synthesis of nanosize compounds having a [2,2]-paracyclophane topology.

References

• Chemistry of Bridging Phosphanes : Cu^I-Dimers Bearing 2,5-bis(2-Pyridyl)phosphole Ligands.
  B. Nohra, E. Rodriguez-Sanz, C. Lescop, R. Réau, Chem. Eur. J., 2007, accepted for publication.

• Coordination Polymers with π-Stacked Metalloparacyclophane Motifs : Unprecedent F-shaped Mixed-Coordination Bimetallic Connectors.
  B. Nohra, Y. Yao, C. Lescop, R. Réau, Angew. Chem. Int. Ed., 2007, ASAP.

• Mimicking [2,2]Paracyclophane Topology : Molecular Clips for the Coordination-Driven Co-facial Assembly of π-Conjugated Systems.
  B. Nohra, S. Graule, C. Lescop and Régis Réau, J. Am. Chem. Soc., 2006, 128, 3520.

• Bridging Phosphanes : Exotic or Versatile Binucleating Ligands ?
  F. Leca, C. Lescop, E. Rodriguez, K. Costuas, J.-F. Halet, R. Réau, Angew. Chem. Int. Ed., 2005, 44, 4362.