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Liquid Crystals Volume 37, 2010 - Issue 3
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Original Articles

Synthesis and physical properties of a main-chain chiral smectic thiol-ene oligomer

Hong Yang Institut Curie, Centre de Recherche, CNRS UMR 168, Université Pierre et Marie Curie, 26 rue d'Ulm 75248 Paris cedex 05, France
,
Jacqueline M. Richardson Department of Chemistry and Biochemistry, 215 UCB, University of Colorado, Boulder, CO, 80309-0215, USA
,
David M. Walba Department of Chemistry and Biochemistry, 215 UCB, University of Colorado, Boulder, CO, 80309-0215, USA
,
Chenhui Zhu Department of Physics, 390 UCB, University of Colorado, Boulder, CO, 80309-0390, USA
,
Renfan Shao Department of Physics, 390 UCB, University of Colorado, Boulder, CO, 80309-0390, USA
,
Noel A. Clark Department of Physics, 390 UCB, University of Colorado, Boulder, CO, 80309-0390, USA
,
Josu Ortega Departamento de Física Aplicada II, Facultad de Ciencia y Tecnología, Universidad del País Vasco, Apdo. 644, 48080, Bilbao, Spain
,
Jesus Etxebarria Departamento de Física de la Materia Condensada, Facultad de Ciencia y Tecnología, Universidad del País Vasco, Apdo. 644, 48080, Bilbao, Spain
&
Patrick Keller Institut Curie, Centre de Recherche, CNRS UMR 168, Université Pierre et Marie Curie, 26 rue d'Ulm 75248 Paris cedex 05, FranceCorrespondence[email protected]
 show all
Pages 325-334 | Received 13 Nov 2009, Accepted 25 Nov 2009, Published online: 04 Mar 2010
 
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Abstract

The synthesis and characterisation of a main-chain chiral smectic liquid crystalline thiol-ene polymer system is described. The chemical structure is designed based on the structure of W317, a mesogen with a large electroclinic effect in the Smectic A∗ (SmA∗) phase. The novel thiol-ene monomer K0902 has a large surface electroclinic effect with an unexpected small electroclinic effect in the SmA∗ phase. The corresponding thiol-ene oligomer poly-K0902 is characterised by gel permeation chromatography (GPC), differential scanning calorimetry (DSC), polarised optical microscopy (POM), X-ray diffraction (XRD) and shows an expected I–SmA∗–Glass phase sequence, but the electroclinic angle is relatively small.

Acknowledgements

We thank the Agence Nationale de la Recherche (award No. ANR-07-MAPR-0020-02) and the Liquid Crystal Materials Research Center (NSF MRSEC Award No. DMR-0213918) for partial financial support of this work.

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