Liquid-crystalline solvents as mechanistic probes. 29. Chiral discotic columnar mesophases from the .alpha. and .beta. anomers of penta-O-n-alkanoylglucopyranoses

1988 ◽  
Vol 110 (7) ◽  
pp. 2177-2185 ◽  
Author(s):  
Nancy L. Morris ◽  
Richard G. Zimmermann ◽  
Geoffrey B. Jameson ◽  
Adam W. Dalziel ◽  
P. Matthew. Reuss ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Columnar Mesophases

scholarly journals Temperature-Dependent X-Ray Studies of Discotic Hexagonal Columnar Mesophases in Trinuclear Gold(I) Pyrazolate Complex

2021 ◽  
Vol 17 (3) ◽  
pp. 285-294
Author(s):  
Mohamad Azani Abd Khadir Jalani ◽  
Hendrik O. Lintang ◽  
Siew Ling Lee ◽  
Juan Matmin ◽  
Nur Fatiha Ghazalli ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Variable Temperature ◽  
Gold Complex ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Heating And Cooling ◽  
Depth Study ◽  
Columnar Mesophases ◽  
Hexagonal Columnar

Gold(I) pyrazolate complex ([Au3Pz3]C10TEG) has been widely studied due to its interesting liquid crystalline properties by exhibiting the discotic hexagonal columnar arrangement. Generally, the liquid crystalline properties of the gold complex were confirmed based on their differential scanning calorimetry thermogram and polarized optical microscopy (POM) images. However, there is still no in-depth study on the phase transition in liquid crystals of [Au3Pz3]C10TEG especially on its structural change at variable temperature. In this study, the resulting liquid crystalline properties of [Au3Pz3]C10TEG upon being heated and cooled was extensively demonstrated via variable-temperature POM (VT-POM) and small angle X-ray scattering (VT-SAXS). Based on the VT-POM images, it was indicated that [Au3Pz3]C10TEG displayed a fan-shaped texture for typical arrangements of discotic hexagonal columnar of liquid crystals. Moreover, VT-SAXS results was in good agreement with the VT-POM images as it showed that [Au3Pz3]C10TEG might consist of two types of stacking system, which are ordered and disordered hexagonal discotic arrangements. Likewise, VT-SAXS analysis also demonstrated that hexagonal columnar mesophase of [Au3Pz3]C10TEG could be recovered even after the heating and cooling for two cycles.

scholarly journals Ionic columnar clustomesogens: associations between anionic hexanuclear rhenium clusters and liquid crystalline triphenylene tethered imidazoliums

2018 ◽  
Vol 47 (32) ◽  
pp. 10884-10896 ◽  
Author(s):  
F. Camerel ◽  
F. Kinloch ◽  
O. Jeannin ◽  
M. Robin ◽  
S. K. Nayak ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Film Forming ◽  
Columnar Mesophases

[Re6Se8(CN)6]4− clusters combined with imidazolium-anchored triphenylene generate phosphorescent columnar mesophases with good film-forming properties.

Segregated co-assembly of fullerene-triphenylene hybrid dendrimers in columnar mesophases showing ambipolar charge transport

2021 ◽  
Author(s):  
Bin Mu ◽  
Jian Chen ◽  
Keyang Chen ◽  
Chunxiu Zhang ◽  
Dongzhong Chen
Keyword(s):  
Charge Transport ◽  
Liquid Crystalline ◽  
Discotic Mesogens ◽  
Columnar Mesophases ◽  
Liquid Crystalline Dendrimers

Liquid-crystalline dendrimers with donor triphenylene as the peripheral discotic mesogens and acceptor fullerene as the dendrimer core have been designed and synthesized with the aim of achieving heterojunction ambipolar charge...

Tuning liquid crystalline phase behaviour in columnar crown ethers by sulfur substituents

2017 ◽  
Vol 4 (5) ◽  
pp. 790-803 ◽  
Author(s):  
Jochen Kirres ◽  
Katharina Schmitt ◽  
Iris Wurzbach ◽  
Frank Giesselmann ◽  
Sabine Ludwigs ◽  
...  
Keyword(s):  
Crown Ethers ◽  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Phase Behaviour ◽  
Liquid Crystalline Phase ◽  
Side Chains ◽  
Columnar Mesophases ◽  
Sulfur Containing

Sulfur-containing side chains in the periphery ofo-terphenyl or triphenylene units of crown ethers induce room-temperature columnar mesophases.

Liquid crystalline alkylthia-substituted novel phthalocyanines: synthesis and characterization

2014 ◽  
Vol 18 (01n02) ◽  
pp. 139-148 ◽  
Author(s):  
Buket S. Erdoğan ◽  
Devrim Atilla ◽  
Ayşe G. Gürek ◽  
Vefa Ahsen
Keyword(s):  
Liquid Crystalline ◽  
Metal Salt ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Elemental Analyses ◽  
Diffraction Patterns ◽  
Columnar Mesophases ◽  
New Compounds ◽  
Hexagonal Columnar

Methylene-bridged tetra- and octa-alkylthia substituted metal free- and Ni ( II ) phthalocyanines were synthesized from the corresponding phthalonitrile derivatives in the presence of the anhydrous metal salt ( NiCl 2) or a strong organic base. The new compounds were fully characterized by elemental analyses, UV-vis, IR, NMR and mass spectra. The mesogenic properties of these materials were studied by differential scanning calorimetry, optical microscopy and X-ray diffraction investigations. X-ray diffraction patterns of the mesophase confirmed that the tetra- and the octa-substituted compounds formed hexagonal columnar mesophases (Colh). The mesogenic properties of these compounds were compared to that of their octa alkythia substituted phthalocyanine derivatives in the literature.

Liquid-Crystalline Inositol Ethers, their Syntheses and Columnar Mesophases

1991 ◽  
Vol 10 (4) ◽  
pp. 539-548 ◽  
Author(s):  
K. Praefcke ◽  
P. Marquardt ◽  
B. Kohne ◽  
W. Stephan
Keyword(s):  
Liquid Crystalline ◽  
Columnar Mesophases

Liquid-Crystalline Crown Ether: Forming Columnar Mesophases by Molecular Recognition

1997 ◽  
Vol 36 (10) ◽  
pp. 1119-1121 ◽  
Author(s):  
Jörg Andreas Schröter ◽  
Carsten Tschierske ◽  
Michael Wittenberg ◽  
Joachim Heinz Wendorff
Keyword(s):  
Molecular Recognition ◽  
Crown Ether ◽  
Liquid Crystalline ◽  
Columnar Mesophases
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