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Issue J. Physique Lett.
Volume 46, Number 18, septembre 1985
Page(s) 875 - 880
DOI 10.1051/jphyslet:019850046018087500

J. Physique Lett. 46, 875-880 (1985)
DOI: 10.1051/jphyslet:019850046018087500

Phasmids : a new class of liquid crystals

J. Malthête1, A.M. Levelut2 et Nguyen Huu Tinh3

1  Laboratoire de Chimie des Interactions Moléculaires, Collège de France, 75231 Paris Cedex, France
2  Laboratoire de Physique des Solides, associé au CNRS, Bâtiment 510, 91405 Orsay Cedex, France
3  Centre de Recherche Paul-Pascal, Domaine Universitaire, 33405 Talence Cedex, France


Abstract
Two hexa-alkoxy derivatives (7a and 7b) of terephthal-bis-[4-benzoyloxyaniline] are described. They exhibit two new types of mesophase for which the term phasmidic is proposed : one has an hexagonal 2D lattice and the second an oblique 2D lattice.


Résumé
On décrit deux dérivés hexa alcoxy de la téréphtal-bis-[benzoyloxy-4-aniline] 7a et 7b. Ils présentent deux nouveaux types de mésophases pour lesquelles le qualificatif (phases) phasmidiques est proposé. L'une de ces mésophases possède un réseau bidimensionnel hexagonal, l'autre un réseau bidimensionnel oblique.

PACS
6130 - Liquid crystals.
6470M - Transitions in liquid crystals.

Key words
liquid crystal phase transformations -- liquid crystals -- organic compounds -- phasmids -- transition temperatures -- hexa alkoxy derivatives -- terephthal bis 4 benzoyloxyaniline -- mesophase -- hexagonal 2D lattice -- oblique 2D lattice




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