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All Outputs (24)

Asymmetric fluorinated dimers for dual frequency liquid crystal mixtures : synthesis, mesomorphism & electro-optic properties (2017)
Thesis
Allan, D. D. Asymmetric fluorinated dimers for dual frequency liquid crystal mixtures : synthesis, mesomorphism & electro-optic properties. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4219122

Dual frequency liquid crystal mixtures are a technology used to achieve faster response times in electro-optical devices. At low driving frequencies the material acts as a positive dielectric, while at high frequencies the materials switches to a neg... Read More about Asymmetric fluorinated dimers for dual frequency liquid crystal mixtures : synthesis, mesomorphism & electro-optic properties.

The synthesis and evaluation of ferroelectric liquid crystal host materials (2015)
Thesis
Komandla, S. R. The synthesis and evaluation of ferroelectric liquid crystal host materials. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4217874

This research is based on the synthesis and evaluation of liquid crystalline host materials for use in ferroelectric liquid crystal devices. The liquid crystal materials are synthesised by incorporating silane bulky end groups linked by an alkoxy spa... Read More about The synthesis and evaluation of ferroelectric liquid crystal host materials.

Novel liquid crystals with bulky terminal groups for ferroelectric displays in nanotechnology (2015)
Thesis
Pashameah, R. A. Novel liquid crystals with bulky terminal groups for ferroelectric displays in nanotechnology. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4222304

The field of liquid crystals has become the focus of extensive research over the last century in terms of the design, synthesis and evaluation of novel materials, and the development of high technology applications, particularly displays. Virtually a... Read More about Novel liquid crystals with bulky terminal groups for ferroelectric displays in nanotechnology.

Liquid crystalline organic semiconductors for application in opto-electronic devices (2015)
Thesis
Billa, M. R. Liquid crystalline organic semiconductors for application in opto-electronic devices. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4216737

The synthesis and evaluation of novel photo-reactive liquid crystalline materials that exhibit light emitting, charge transporting and photovoltaic properties is described. Low-molar-mass liquid crystalline monomers, based on a series of substituted... Read More about Liquid crystalline organic semiconductors for application in opto-electronic devices.

The synthesis and evaluation of nitrile-containing ferroelectric chiral liquid crystal dopants (2014)
Thesis
Reddy, V. The synthesis and evaluation of nitrile-containing ferroelectric chiral liquid crystal dopants. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4216502

Ferroelectric Liquid Crystal Displays offer fast switching times in the sub millisecond region and a high contrast ratio. There is a need for faster refresh rates to cope with fast moving images and the possibility of sequential red-green-blue illumi... Read More about The synthesis and evaluation of nitrile-containing ferroelectric chiral liquid crystal dopants.

Design and investigation of novel photoactive liquid crystalline organic-inorganic hybrids (2013)
Thesis
Ferreira, A. J. T. Design and investigation of novel photoactive liquid crystalline organic-inorganic hybrids. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4215209

This work describes and discusses the design, synthesis and characterization of novel photoactive liquid crystalline silsesquioxanes. The investigations carried out include the initial design, chemical synthesis and characterization, photochemical pr... Read More about Design and investigation of novel photoactive liquid crystalline organic-inorganic hybrids.

Synthesis and mesomorphic behaviour of high polarisability materials for non-linear optical applications (2012)
Journal Article
Seed, A. J., Toyne, K. J., Hird, M., & Goodby, J. W. (2012). Synthesis and mesomorphic behaviour of high polarisability materials for non-linear optical applications. Liquid crystals, 39(4), 403-414. https://doi.org/10.1080/02678292.2012.658090

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... Read More about Synthesis and mesomorphic behaviour of high polarisability materials for non-linear optical applications.

Ferroelectricity in liquid crystals—materials, properties and applications (2011)
Journal Article
Hird, M. (2011). Ferroelectricity in liquid crystals—materials, properties and applications. Liquid crystals, 38(11-12), 1467-1493. https://doi.org/10.1080/02678292.2011.625126

Molecular chirality confers the necessary reduced symmetry to tilted smectic liquid crystals and disordered crystals to generate ferroelectric properties. By definition, ferroelectrics are materials that possess a spontaneous polarisation in the abse... Read More about Ferroelectricity in liquid crystals—materials, properties and applications.

Synthesis and properties of novel columnar liquid crystals based on symmetrical and non-symmetrical 1,3,5-trisubstituted benzene derivatives (2010)
Journal Article
Stackhouse, P. J., Wilson, A., Lacey, D., & Hird, M. (2010). Synthesis and properties of novel columnar liquid crystals based on symmetrical and non-symmetrical 1,3,5-trisubstituted benzene derivatives. Liquid crystals, 37(9), 1191-1203. https://doi.org/10.1080/02678292.2010.490647

In this structure-property correlation study we have investigated a number of novel disc-shaped compounds incorporating a 1,3,5-trisubstituted benzene at the central core. All the materials with peripheral arms attached through an ester linkage exhib... Read More about Synthesis and properties of novel columnar liquid crystals based on symmetrical and non-symmetrical 1,3,5-trisubstituted benzene derivatives.

The synthesis and properties of liquid crystals with bulky terminal groups for bookshelf geometry ferroelectric mixtures (2010)
Thesis
Radini, I. A. M. The synthesis and properties of liquid crystals with bulky terminal groups for bookshelf geometry ferroelectric mixtures. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4211561

The area of liquid crystals has received a substantial research effort over the last century, particularly when the beneficial applications such as Liquid Crystal Displays (LCDs) were realised and developed. The changes to the molecular structure of... Read More about The synthesis and properties of liquid crystals with bulky terminal groups for bookshelf geometry ferroelectric mixtures.

The dramatic influence of the location of bend and of lateral fluoro substitution on the mesomorphic properties of angular chiral esters based on a 1,3-disubstituted benzene ring (2010)
Journal Article
Fergusson, K. M., & Hird, M. (2010). The dramatic influence of the location of bend and of lateral fluoro substitution on the mesomorphic properties of angular chiral esters based on a 1,3-disubstituted benzene ring. Journal of Materials Chemistry, 20(15), 3069-3078. https://doi.org/10.1039/b923267b

The synthesis and mesomorphic properties of a range of 3-ring and 4-ring chiral esters based on a 1,3-disubstituted benzene unit are detailed. These materials all deviate from the usual linear molecular architecture of liquid crystals, and hence are... Read More about The dramatic influence of the location of bend and of lateral fluoro substitution on the mesomorphic properties of angular chiral esters based on a 1,3-disubstituted benzene ring.

The influence of an alkenyl terminal group on the mesomorphic behavior and electro-optic properties of fluorinated terphenyl liquid crystals (2010)
Journal Article
Hird, M., & Lewis, R. (2010). The influence of an alkenyl terminal group on the mesomorphic behavior and electro-optic properties of fluorinated terphenyl liquid crystals. Journal of Materials Chemistry, 20(2), 299 - 307. https://doi.org/10.1039/b914260f

Novel liquid crystal terphenyls with two, three and four lateral fluoro substituents and an alkene unit at the end of a terminal chain are presented in terms of synthesis, mesomorphic behaviour and electro-optic properties. The difluoro analogues wer... Read More about The influence of an alkenyl terminal group on the mesomorphic behavior and electro-optic properties of fluorinated terphenyl liquid crystals.

The synthesis and mesomorphic properties of liquid crystals with bulky terminal groups designed for bookshelf geometry ferroelectric mixtures (2009)
Journal Article
Radini, I. A., & Hird, M. (2009). The synthesis and mesomorphic properties of liquid crystals with bulky terminal groups designed for bookshelf geometry ferroelectric mixtures. Liquid crystals, 36(12), 1417-1430. https://doi.org/10.1080/02678290903268328

The synthesis and mesomorphic properties of a systematic range of ortho difluoroterphenyls with a bulky terminal chain are detailed. The bulky terminal chain consists of either a tertiarybutyl group or a trimethylsilyl unit, each separated from the c... Read More about The synthesis and mesomorphic properties of liquid crystals with bulky terminal groups designed for bookshelf geometry ferroelectric mixtures.

The influence of an alkenyl terminal group on the mesomorphic behaviour and electro-optic properties of fluorinated terphenyl liquid crystals (2009)
Journal Article
Gasowska, J. S., Cowling, S. J., Cockett, M. C. R., Hird, M., Lewis, R. A., Raynes, E. P., & Goodby, J. W. (2010). The influence of an alkenyl terminal group on the mesomorphic behaviour and electro-optic properties of fluorinated terphenyl liquid crystals. Journal of Materials Chemistry, 20(2), 299-307. https://doi.org/10.1039/b914260f

Novel liquid crystal terphenyls with two, three and four lateral fluoro substituents and an alkene unit at the end of a terminal chain are presented in terms of synthesis, mesomorphic behaviour and electro-optic properties. The difluoro analogues wer... Read More about The influence of an alkenyl terminal group on the mesomorphic behaviour and electro-optic properties of fluorinated terphenyl liquid crystals.

Influence of acetylene-containing peripheral chains on the mesomorphic properties of triphenylene-based liquid crystals (2009)
Journal Article
Stackhouse, P. J., & Hird, M. (2009). Influence of acetylene-containing peripheral chains on the mesomorphic properties of triphenylene-based liquid crystals. Liquid crystals, 36(9), 953-965. https://doi.org/10.1080/02678290903165490

Three series of novel acetylene-containing triphenylene-based liquid crystals have been prepared. One class of material is symmetrical with the acetylenic unit located at the terminus of a peripheral alkynyloxy chain in a peripheral position at the t... Read More about Influence of acetylene-containing peripheral chains on the mesomorphic properties of triphenylene-based liquid crystals.

Molecular complexity and the control of self-organising processes (2009)
Journal Article
Goodby, J. W., Saez, I. M., Cowling, S. J., Gasowska, J. S., MacDonald, R. A., Sia, S., Watson, P., Toyne, K. J., Hird, M., Lewis, R. A., Lee, S.-E., & Vaschenko, V. (2009). Molecular complexity and the control of self-organising processes. Liquid crystals, 36(6-7), 567-605. https://doi.org/10.1080/02678290903146060

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... Read More about Molecular complexity and the control of self-organising processes.

Measurement of electro-optical parameters of a high contrast FLC film (2008)
Journal Article
Karapinar, R., O'Neill, M., & Hird, M. (2009). Measurement of electro-optical parameters of a high contrast FLC film. Optics Communications, 282(7), 1345-1348. https://doi.org/10.1016/j.optcom.2008.12.017

We have fabricated a ferroelectric liquid crystal (FLC) film by using a novel ferroelectric mixture. The various ferroelectric parameters such as response time, spontaneous polarization and contrast ratio of the FLC film have been measured. Experimen... Read More about Measurement of electro-optical parameters of a high contrast FLC film.

The design, synthesis and mesomorphic properties of discotic liquid crystals (2008)
Thesis
Stackhouse, P. J. The design, synthesis and mesomorphic properties of discotic liquid crystals. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4208629

Discotic liquid crystal research is now more than 30 years old, however it is still early days compared with the well-established area of calamitic liquid crystal research which dates back for more than a century. Since the 1990’s there has been grea... Read More about The design, synthesis and mesomorphic properties of discotic liquid crystals.

Influence of branched chains on the mesomorphic properties of symmetrical and unsymmetrical triphenylene discotic liquid crystals (2008)
Journal Article
Stackhouse, P. J., & Hird, M. (2008). Influence of branched chains on the mesomorphic properties of symmetrical and unsymmetrical triphenylene discotic liquid crystals. Liquid crystals, 35(5), 597-607. https://doi.org/10.1080/02678290802040026

A series of novel symmetrical and unsymmetrical triphenylene-based discotic liquid crystalline materials with one or six branched peripheral alkoxy chains have been prepared. These materials have been compared with analogous known symmetrical and uns... Read More about Influence of branched chains on the mesomorphic properties of symmetrical and unsymmetrical triphenylene discotic liquid crystals.