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Issue 39, 2009
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Novel liquid-crystalline mesogens and main-chain chiral smectic thiol-ene polymers based on trifluoromethylphenyl moieties

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Abstract

The synthesis and characterization of a series of novel liquid-crystalline molecules containing a trifluoromethylphenyl core or a 2,3-bis(trifluoromethyl)phenyl core is described. All trifluoromethylphenyl-containing compounds (W530, W551, and W558) have mesomorphic properties while 2,3-bis(trifluoromethyl)phenyl-containing compounds (W555, W556, W557) are room-temperature crystals without mesophases. Thereafter, based on the chemical structure of W558, to pursue a mesogen with a large electroclinic effect in the SmA* phase for development into electromechanical actuators, a chiral smectic thiol-ene monomer (K0901) is synthesized and polymerized in organic solvents. The polymer is characterized by GPC, DSC, PLM, XRD and shows an expected I–SmA* –Glass phase sequence though the electroclinic effect is relatively small.

Graphical abstract: Novel liquid-crystalline mesogens and main-chain chiral smectic thiol-ene polymers based on trifluoromethylphenyl moieties

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Publication details

The article was received on 20 Apr 2009, accepted on 30 Jul 2009 and first published on 20 Aug 2009


Article type: Paper
DOI: 10.1039/B907907F
Citation: J. Mater. Chem., 2009,19, 7208-7215

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    Novel liquid-crystalline mesogens and main-chain chiral smectic thiol-ene polymers based on trifluoromethylphenyl moieties

    H. Yang, L. Wang, R. Shao, N. A. Clark, J. Ortega, J. Etxebarria, P. Albouy, D. M. Walba and P. Keller, J. Mater. Chem., 2009, 19, 7208
    DOI: 10.1039/B907907F

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