Mesomorphic Metallo-Dendrimers Based on the Metal-Metal Bonded Ru2(CO)4 Sawhorse Unit
Author(s)
Frein, Stephane
Auzias, Mathieu
Sondenecker, Aline
Vieille-Petit, Ludovic
Guintchin, Boris
Maringa, Natacha
Barbera, Joaquin
Date issued
2008
In
Chem. Mater.
Vol
4
No
20
From page
1340
To page
1343
Subjects
mesomorphic metallodendrimer metal bonded ruthenium carbonyl cyanobiphenyl based sawhorse liq crystal ruthenium carbonyl cyanobiphenyl based sawhorse
Abstract
Dinuclear Ru complexes contg. the stable metal-metal bonded Ru2(CO)4 sawhorse unit with two dendritic carboxylato bridges were synthesized and characterized. All complexes Ru2(CO)4(O2CR)2L2 (R = R1, R2, R3) contg. cyanobiphenyl-based poly(arylester) dendrons of 1st (R1), 2nd (R2), and 3rd (R3) generation and PPh3, pyridine, or 4-picoline ligands L proved to be mesomorphic, giving rise to smectic A or smectic A and nematic phases. The supramol. 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. [on SciFinder(R)]
Publication type
journal article