Journal ArticleDOI
Synthesis, crystal structures, mesomorphic and photo-luminescent properties of 1,3,4-thia(oxa)diazole-based compounds with a terminal methoxy or methylthio group
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TLDR
A series of aromatically 2,5-disubstituted 1,3,4-thia(oxa)diazoles with a terminal methoxy or methylthio group were synthesized and characterized by means of 1H NMR, 13C NMR and elemental analysis as discussed by the authors.About:
This article is published in Journal of Molecular Structure.The article was published on 2009-11-26. It has received 16 citations till now. The article focuses on the topics: Diazole & Liquid crystal.read more
Citations
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1,3,4-Oxadiazole based liquid crystals
TL;DR: In this article, 1,3,4-oxadiazole-based liquid crystals are classified into three categories according to their different molecular shapes and molecular weight: calamitic and discotic monomers, symmetric and non-symmetric dimers, and polymers including main-chain, side-chain and mesogen-jacketed types.
Journal ArticleDOI
Symmetrical mesogenic 2,5-bis(6-naphthalen-2-yl)-1,3,4-thiadiazoles
TL;DR: In this paper, a series of new symmetrical 1,3,4-oxadiazoles 1a-n and 1b-n were prepared and their mesomorphic properties investigated by optical microscopy, differential scanning calorimetry, and powder X-ray diffractometry.
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Unsymmetric 1,3,4-oxa(thia)diazoles of quinoxaline–naphthalene conjugates
TL;DR: In this paper, a series of unsymmetric 1,3,4-oxa(thia)diazoles 1a,b containing both quinoxaline and naphthalene moieties were prepared and their mesomorphic properties were investigated.
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Novel 2-amino-1,3,4-thiadiazoles and their acyl derivatives: Synthesis, structural characterization, molecular docking studies and comparison of experimental and computational results
TL;DR: In this paper, the authors synthesize and characterize compounds containing 2-amino-1,3,4-thiadiazole and compare experimental results to theoretical results, finding that theoretical and experimental results obtained in the experiment were compatible with each other and with the values found in the literature.
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Non-symmetrically (1,2,4- and 1,3,4-)oxadiazole homologous: synthesis, characterisation and study the effect of different substituents on their mesophase behaviours
TL;DR: In this article, the synthesis and mesomorphic behavior of related compounds that possess ester linkage with different substituted groups on the para of the phenyl to six derivatives containing 1,3,4-oxadiazole and like another six containing 1 2,4oxadizole rings were presented.
References
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Journal ArticleDOI
Measurement of photoluminescence quantum yields. Review
Glenn A. Crosby,James N. Demas +1 more
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Thermotropic biaxial nematic liquid crystals.
TL;DR: Polarized microscopy and conoscopy indicate that liquid crystal mesogens based on a nonlinear oxadiazole unit that exhibit nematic phases near 200 degrees C are biaxial nematics, and unambiguous and quantitative evidence for biaXiality is achieved using 2H NMR spectroscopy.
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Synthesis of self-organizing mesogenic materials containing a sulfur-based five-membered heterocyclic core.
TL;DR: This critical review describes the most recent synthetic methodology that has been used to prepare thiophene, 1,3-thiazole, and1,3,4-thiadiazole-based mesogenic materials.
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Luminescent Liquid Crystals Derived from 9,10-Bis(Phenylethynyl)anthracene
TL;DR: In this article, liquid crystalline behavior has been found in a series of low-molecular-weight 9,10-disubstituted anthracenes, showing that the presence of this substituent induces a mesophase despite the broad central core of the anthracene skeleton.
Journal ArticleDOI
Low-birefringent, chiral banana phase below calamitic nematic and/or smectic C phases in oxadiazole derivatives.
Sungmin Kang,Yuki Saito,Nobuhiro Watanabe,Masatoshi Tokita,Yoichi Takanishi,Hideo Takezoe,Junji Watanabe +6 more
TL;DR: From detailed analyses of the optical texture and X-ray patterns through the transformation from well-oriented calamitic phases, the Bx phase was found to exhibit a helical structure, which arises as a frustration from the ground-state B2 phase in such a manner that the blocks of B2 layers are twisted with respect to each other in a direction parallel to the layer plane similarly to the twisted grain boundary (TGB) phase.