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Liquid-crystalline methanofullerodendrimers which display columnar mesomorphism

Auteur(s)
Maringa, Natacha
Lenoble, Julie
Donnio, Bertrand
Guillon, Daniel
Deschenaux, Robert 
Institut de chimie 
Date de parution
2008
In
Journal of Materials Chemistry, Royal Society of Chemistry, 2008/18//1524-1534
Résumé
Liquid-crystalline methanofullerodendrimers were synthesized <i>via</i> the Bingel addition reaction of mesomorphic malonate derivatives and C<sub>60</sub>. Second- and third-generation poly(benzyl ether) dendrons were selected as liquid-crystalline promoters to induce columnar mesomorphism. Based on a convergent and modular synthetic methodology, symmetrical (two identical dendrons) and non-symmetrical (two different dendrons) dendrimers were prepared, as well as hemidendrimers (only one dendron). The liquid-crystalline properties of the malonates and fullerodendrimers were investigated by polarized optical microscopy, differential scanning calorimetry, and X-ray diffraction. All the malonates give rise to hexagonal columnar phases of <i>p</i>6<i>mm</i> symmetry. As for the fullerodendrimers, the second-generation hemidendrimer shows a rectangular columnar phase of <i>c</i>2<i>mm</i> symmetry, while the other materials give rise to hexagonal columnar phases of <i>p</i>6<i>mm</i> symmetry.
Identifiants
https://libra.unine.ch/handle/123456789/15796
_
10.1039/b717105f
Type de publication
journal article
Dossier(s) à télécharger
 main article: Maringa_Natacha_-_Liquid-crystalline_methanofullerodendrimers_20090203.pdf (2.69 MB)
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