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Antiferroelectric bent - core liquid crystals for molecular switching applications / S. Balamurugan in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7121–7128 Titre : Antiferroelectric bent - core liquid crystals for molecular switching applications Type de document : texte imprimé Auteurs : S. Balamurugan, Auteur ; P. Kannan, Auteur ; M. T. Chuang, Auteur Année de publication : 2010 Article en page(s) : pp. 7121–7128 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Antiferroélectriques Résumé : A homologous series of unsymmetrical bent-core (BC) liquid crystalline (LC) molecules were synthesized and characterized. Structural effects on mesomorphic and physiochemical properties were investigated in terms of variation in one terminal chain length with respect to constant at another terminal. The synthesis and characterization of new bent-core mesogens were exhibiting antiferroelectric switchable columnar phases. The homologues with short methylene chains (8a and 8b) and longer methylene chain (8d−8g) molecules exhibited switchable B2 mesophase and nonswitchable rectangular columnar B1 phase obtained for phase middle homologue (8c). The spacer effect was observed in forming B2 phase with various lengths of spacers. Spontaneous polarization was measured and maximum of 535 nC/cm−1 observed for longer methylene chain containing compound (8g). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100019p [article] Antiferroelectric bent - core liquid crystals for molecular switching applications [texte imprimé] / S. Balamurugan, Auteur ; P. Kannan, Auteur ; M. T. Chuang, Auteur . - 2010 . - pp. 7121–7128. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7121–7128 Mots-clés : Antiferroélectriques Résumé : A homologous series of unsymmetrical bent-core (BC) liquid crystalline (LC) molecules were synthesized and characterized. Structural effects on mesomorphic and physiochemical properties were investigated in terms of variation in one terminal chain length with respect to constant at another terminal. The synthesis and characterization of new bent-core mesogens were exhibiting antiferroelectric switchable columnar phases. The homologues with short methylene chains (8a and 8b) and longer methylene chain (8d−8g) molecules exhibited switchable B2 mesophase and nonswitchable rectangular columnar B1 phase obtained for phase middle homologue (8c). The spacer effect was observed in forming B2 phase with various lengths of spacers. Spontaneous polarization was measured and maximum of 535 nC/cm−1 observed for longer methylene chain containing compound (8g). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100019p