Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Kenneth J. Toyne"'
Publikováno v:
Liquid Crystals. 39:403-414
A variety of high polarisability materials have been synthesised with thioester and alkyne linking groups, and isothiocyanato and cyano terminal groups. The synthesis of these materials is presented and the transition temperatures and optical paramet
Autor:
Isabel M. Saez, Valerij Vaschenko, Stephen J. Cowling, Michael Hird, Seung Eun Lee, Susan Sia, Robert A. MacDonald, Robert A. Lewis, J. Gasowska, Paul Watson, John W. Goodby, Kenneth J. Toyne
Publikováno v:
Liquid Crystals. 36:567-605
In this article we investigate the complexity of the molecular architectures of liquid crystals based on rod-like mesogens. Starting from simple monomeric systems founded on fluoroterphenyls, we first examine the effects of aromatic core structure on
Publikováno v:
Liquid Crystals. 30:1089-1107
The synthesis of a variety of thiophene-containing materials for use in electro-optic devices requiring highly birefringent materials is reported. The refractive indices were measured with the use of an Abbe refractometer, and from these results the
Publikováno v:
Molecular Crystals and Liquid Crystals. 401:1-18
The use of fluoro substituents in liquid crystals has proved essential for the development of materials with optimised properties for advanced high technology devices. The small size and high polarity of a fluoro substituent can have some remarkable
Publikováno v:
Ferroelectrics. 276:219-237
After nearly 20 years of intense research, ferroelectric liquid crystals are now being used in commercial devices. This timely review will consider the structural units and their specific combinations that can be used to generate the required smectic
Publikováno v:
Journal of Materials Chemistry. 11:2801-2807
The syntheses of novel octa- and tetra-substituted systems based on tetrabenz[a,c,h,j]anthracene are reported. The disc-shaped octa-substituted material exhibits a columnar mesophase, whereas the tetra-substituted material exhibits a lamellar phase.
Publikováno v:
Journal of Materials Chemistry. 11:2732-2742
The synthesis, transition temperatures and chiral properties of a range of novel achiral and racemic liquid crystals with a bent molecular shape containing a 1,5-disubstituted 2,3,4-trifluorophenyl moiety are detailed in the context of the recently p
Publikováno v:
Liquid Crystals. 28:1047-1055
The synthesis of novel unsymmetrically-substituted tetrathiafulvalene derivatives based on lithiation procedures is described. The disubstituted derivatives were synthesized as 1:1 cis/trans-isomeric mixtures, the compositions of which were establish
Autor:
Michael Hird, John W. Goodby, I. Peter Buxton, Alexander J. Seed, Mark R. Herbert, Kenneth J. Toyne, Helen F. Gleeson
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 365:213-220
Several esters have been synthesised that exhibit the antiferroelectric smectic C phase. The core structures, like virtually all antiferroelectric materials, are very similar to that of MHPOBC. Lateral fluoro substituents have been used to reduce mel
Publikováno v:
Liquid Crystals. 28:901-912
The synthesis and transition temperatures of a series of 5-(4-alkyl- and 4-alkoxy-phenyl)2-cyanobenzo[b]furans and a 5-(4'-alkylbiphenyl-4-yl)-2-cyanobenzo[b]furan are presented. The 2-cyanobenzo[b]furans show similar mesophase types to the analogous