HAL : in2p3-00025729, version 1

DOI : 10.1080/15421400590958089

Fiche détaillée

Récupérer au format BibTeX - EndNote - TEI - RefWorks -

Molecular Crystals and Liquid Crystals 439 (2005) 245/(2111)-257/(2123)

Design of Siloxane Liquid Crystals Forming a De Vries SmA* Phase

G. Galli, M. Reihmann, A. Crudeli, E. Chiellini, Yu. Panarin, J. Vij, C. Blanc1, V. Lorman1, N. Olsson

(2005)

We designed and synthesized new SmA* liquid crystals with different molecular architectures based on the chiral mesogen MR11, which was unsubstituted, or attached at one end and at both ends of a trisiloxane segment in the monosubstituted MSi3-MR11 and disubstituted DSi3-MR11 siloxanes, respectively. We studied the critical divergence of the magnetic susceptibility by measurements of the induced tilt angle Θind at the SmA*–SmC* transition. While all three SmA* liquid crystals presented a de Vries character, this was quite distinctive for DSi3-MR11 for which the critical exponent γ = 1.87 was maximal. X-ray diffraction experiments confirmed that the SmA*–SmC* transition occurred with essentially no layer shrinkage.

1 :	LPTA - Laboratoire de Physique Théorique et Astroparticules

Thème(s)

:

Physique/Physique/Agrégats Moléculaires et Atomiques

Mot(s)-clé(s) : de Vries smectic – electrooptics – molecular design – siloxane liquid crystal

in2p3-00025729, version 1

http://hal.in2p3.fr/in2p3-00025729

oai:hal.in2p3.fr:in2p3-00025729

Contributeur : Dominique Girod <>

Soumis le : Jeudi 2 Mars 2006, 16:54:17

Dernière modification le : Lundi 13 Mars 2006, 15:00:25