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Showing 1 to 12 of 12 for “"discotic liquid crystals"”.
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Molecular dynamics simulations of calamitic and discotic liquid crystals
… has been made in recent years in modelling liquid crystal phases using the Monte Carlo and molecular dynamics simulation techniques. We describe the technique of molecular dynamics in the microcanonical ensemble that we have used in simulations of liquid crystal systems. A review and …
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The design, synthesis and mesomorphic properties of discotic liquid crystals
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 great deal of interest in discotic liquid crystal …
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FTIR and X-ray investigation of triphenylene based discotic liquid crystals.
… university. The compounds exhibited thermotropic liquid crystalline behaviour. The compounds differed chemically based upon the number and position of methyl additions to the ester benzoate linkage. Unsymmetrical compounds based on hexa-n-alkoxy triphenylenes were also examined. A number of …
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Part I: Self-Assembling Dendrimers Using the Dda-Aad Hydrogen Bonding Motif. Part II: Supramolecular Discotic Liquid Crystals Through Hydrogen Bond Mediated Self-Assembly
In part II, the ability of this heterocyclic unit to generate a self-assembled structure in bulk was tested by attachment of a 3,4,5-tris-dodecyloxybenzyl group to the 8-amino group and evaluating the mesomorphic properties of the resulting derivative. Cumulative solution studies by 1H NMR, SEC and …
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Explorations in Supramolecular Chemistry: Part 1. Development of a Modular System for the Study of Self-Organization Through Microphase Segregation in Discotic Liquid Crystals. Part 2. Investigation of Deazapterins and Naphthyridines as End-Groups for Supramolecular Polymers
In the second investigation, the use of multiple highly directional hydrogen bonds for the formation of supramolecular polymers was explored. Synthetic routes toward supramolecular polymer end-groups based upon the 2-amino-5-deazapterin and 2,7-diamino-[1,8]-naphthyridine ring systems were pursued. …
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Part 1. the mesomorphic properties of arloxy-s-triazines and their analogs, Part 2. the synthesis and polymerization behavior of α-aminonitriles and related compounds
Part 1. Discotic liquid crystals are a relatively new class of mesogens in which the molecules self assemble in the melt state to form highly ordered columnar stacks. The ability of the molecules to display this type of mesomorphic behavior is a function of their shape; a semi-rigid core with …
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Unusual molecular architectures in liquid crystal and polymer chemistry
… goal into the regimes of both small molecules (liquid crystals) and polymeric materials. In both cases, the ultimate goal is the creation of materials that display unique properties that arise due to molecular organizations and/or interactions driven by the underlying shape of the molecules or …
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Mesomorphic Dyes based on Conformationally Flexible 1,3,5-Triazines
… to inorganic semiconductors. Interest in discotic liquid crystals arises from their capacity to combine the high charge carrier mobilities found in crystalline compounds with the solubility, processability and flexibility encountered in amorphous materials. This dissertation focuses on the …
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A Combined Study of Mesomorphism, Optical and Electronic Properties of Novel Columnar Liquid Crystals
Columnar mesophases of discotic liquid crystals (DLCs) are a separate class of organic semiconductors. Anisotropic charge transport, high charge carrier mobility, and self-organizing properties have been regarded as superior properties of DLCs but their performance in devices, such as organic …
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Electronic Properties and Langmuir-Blodgett Films of Discotic Organic Semiconductors
Columnar mesophases of discotic liquid crystals (DLCs) are an emerging class of organic semiconductors that have several advantages over widely applied organic semiconductors based on conductive polymers and glasses of small molecules, such as high charge carrier mobility of >1 cm2V-1s-1 and charge …
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Acenaphthylene Based CP-PAH Materials for Organic Semiconductors
… structures, have potential application as discotic liquid crystals and porous organic solid. 1H NMR and low resolution mass spectra gave solid proof that a target macrocycle was synthesized; however, the tedious work up and limited purification techniques did not enable large scale …
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Organic solar cells based on liquid crystalline and polycrystalline thin films
… is given to the molecular ordering found in liquid crystalline or polycrystalline films as a way to leverage the efficiencies of these types of cells. Maximum efficiencies estimated based on excitonic character of organic solar cells show power conversion efficiencies larger than 10% are …