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Hexacatenar liquid-crystalline complexes of palladium(II) and platinum(II) based on trialkoxystilbazole esters
Auteur(s)
Plasseraud, Laurent
Gonzalez Cuervo, Laura
Guillon, Daniel
Bruce, Duncan W.
Donnio, Bertrand
Date de parution
2002
In
Journal of Materials Chemistry, 2002/12/2653-2658
Résumé
The synthesis and characterisation of 4-(3,4,5-trialkoxybenzoyloxy)pyridines (<b>1a–e</b>), and of their corresponding palladium(II), (<b>2a–e</b>), and platinum(II), (<b>3a–e</b>), complexes are described. The pyridine-based ligands are not mesomorphic, but upon complexation to PdCl<sub>2</sub> or PtCl<sub>2</sub>, new hexacatenar mesogens are formed which show exclusively the hexagonal columnar mesophase. The mesomorphic behaviour of the complexes was characterised by polarised optical microscopy, differential scanning calorimetry and X-ray diffraction. The metal seems to influence the crystal phase and mesophase stability as well as the mesomorphic temperature range.
Identifiants
Type de publication
journal article
