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Mesomorphic Metallo-Dendrimers Based on the Metal−Metal Bonded Ru<sub>2</sub>(CO)<sub>4</sub> Sawhorse Unit
Auteur(s)
Frein, Stéphane
Auzias, Mathieu
Sondenecker, Aline
Vieille-Petit, Ludovic
Guintchin, Boris
Maringa, Natacha
Barberá, Joaquín
Date de parution
2008
In
Chemistry of Materials, American Chemical Society (ACS), 2008/20/4/1340-1343
Résumé
Dinuclear ruthenium complexes containing the stable metal−metal bonded Ru<sub>2</sub>(CO)<sub>4</sub> sawhorse unit with two dendritic carboxylato bridges have been synthesized and characterized. All complexes Ru<sub>2</sub>(CO)<sub>4</sub>(O<sub>2</sub>CR)<sub>2</sub>L<sub>2</sub> (R = R<sup>1</sup>, R<sup>2</sup>, R<sup>3</sup>) containing cyanobiphenyl-based poly(arylester) dendrons of first (R<sup>1</sup>), second (R<sup>2</sup>), and third (R<sup>3</sup>) generation and triphenylphosphine, pyridine, or 4-picoline ligands L proved to be mesomorphic, giving rise to smectic A or smectic A and nematic phases. The supramolecular organization within the smectic A phase is governed by the nature and structure of the mesogenic units and dendritic core. Such materials are of interest for the design of catalytically active anisotropic fluids.
Identifiants
Type de publication
journal article
