Journal ArticleDOI
Novel Liquid Crystalline Materials: Synthesis and preliminary characterization of new 4,4′-disubstituted diphenyldiacetylene, tolane and stilbene derivatives
TLDR
In this paper, the synthesis and mesomorphic properties of several new series of liquid crystalline materials are described, including diacetylenic structures, 4,4′-di-n-acyloxydiphenyldi-acetylene and unsymmetrical 4n-alkoxy.Abstract:
The synthesis and mesomorphic properties of several new series of liquid crystalline materials are described. These include two novel diacetylenic structures, 4,4′-di-n-acyloxydiphenyldi-acetylene and the unsymmetrical 4-n-alkoxy, 4′-cyanodiphenyldiacetylene, and the analogous 4-n-alkoxy,4′-cyanotolanes and stilbenes. A discussion of the effect of structure on transition temperatures is included.read more
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High Birefringence Liquid Crystals
TL;DR: In this paper, the mesogenic properties and physical chemical properties (viscosity, birefringence, refractive indices, dielectric anisotropy and elastic constants) of compounds being cyano, fluoro, isothiocyanato derivatives of biphenyl, terphenyl and quaterphenyl, tolane, phenyl tolane and phenyl ethynyl tolan, and biphenynyl-tolane are compared.
Journal ArticleDOI
Liquid Crystals Obtained from Disclike Mesogenic Diacetylenes and Their Polymerization
Journal ArticleDOI
Room‐temperature diphenyl‐diacetylene liquid crystals
TL;DR: In this article, 30 asymmetric diphenyl-diacetylene (PTTP) liquid-crystal homologs are synthesized and their physical properties characterized, including high birefringence and relatively low viscosity.
Journal ArticleDOI
Physical properties of diphenyldiacetylenic liquid crystals
TL;DR: In this paper, optical and electro-optic properties of two highly conjugated diphenyldiacetylenic liquid crystals (LCs) [1.4−bis−(4−propylphenyl)‐butadiyne, abbreviated as PTTP‐mm] and their eutectic mixture were characterized in the nematic range.
Journal ArticleDOI
Synthesis and Characterization of Mesogenic Disklike Benzenetricarboxylates Containing Diacetylenic Groups and Their Polymerization
TL;DR: In this article, a benzene ring core and three rigid diacetylenic units were attached to the benzene rings via ester linkages, and the morphological change of the compounds and their polymerization were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy, infrared spectroscopy (IR), and powder X-ray diffraction (XRD).
References
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Journal ArticleDOI
A synthetic method for formyl→ethynyl conversion (RCHO→RCCH or RCCR′)
E. J. Corey,P.L. Fuchs +1 more
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Topochemical polymerization of monomers with conjugated triple bonds
TL;DR: In this article, the authors describe a 1.4-addition polymerization of conjugated triple bonds giving rise to a polymer with three cumulated double bonds per repeating unit.
Journal ArticleDOI
Advances in Organic Chemistry
TL;DR: Advances in Organic Chemistry Methods and Results, Vol 3 Edited by Ralph A Raphael, Edward C Taylor and Hans Wynberg Pp vii + 333 105s (New York and London: Interscience Publishers, a Division of John Wiley and Sons, Inc, 1963) as mentioned in this paper
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ir‐laser‐addressed thermo‐optic smectic liquid‐crystal storage displays
TL;DR: The first practical application of smectic liquid crystals, an infrared-laser-addressed light valve for the recording, storage, and display of high-resolution graphic images, was described in this article.
Journal ArticleDOI
New optical storage mode in liquid crystals
Werner E. L. Haas,James E. Adams +1 more
TL;DR: A novel electrically reversible storage effect in doped nematic liquid crystals is described in this article, and the effect was observed in a narrow range of pitch and cell thickness combinations, and is interpreted as a nematic−cholesteric phase transition.