Supramolecular liquid crystals with columnar mesophases through self-assembly of carboxylic acids around a tribasic core

2000 ◽  
pp. 1015-1016 ◽  
Author(s):  
Arno Kraft ◽  
Anja Reichert ◽  
Ralf Kleppinger
Keyword(s):  
Liquid Crystals ◽  
Carboxylic Acids ◽  
Self Assembly ◽  
Columnar Mesophases

scholarly journals Multifunctional ionic hybrid poly(propyleneimine) dendrimers surrounded by carbazole dendrons: liquid crystals, optical and electrochemical properties

RSC Advances ◽  
2015 ◽  
Vol 5 (81) ◽  
pp. 65932-65941 ◽  
Author(s):  
Susana Castelar ◽  
Pilar Romero ◽  
José-Luis Serrano ◽  
Joaquín Barberá ◽  
Mercedes Marcos
Keyword(s):  
Liquid Crystals ◽  
Electrochemical Properties ◽  
Self Assembly ◽  
Photoluminescence Properties ◽  
Columnar Mesophases

Hybrid ionic dendrimers prepared via ionic self-assembly by grafting of a cationic PPI dendrimer with bifunctional electroactive carbazole dendrons, display photoluminescence properties and self-assembly into nematic, smectic or columnar mesophases.

scholarly journals Structure and growth behavior of centimeter-sized helical oleate assemblies formed with assistance of medium-length carboxylic acids

Soft Matter ◽  
2015 ◽  
Vol 11 (18) ◽  
pp. 3550-3558 ◽  
Author(s):  
Yoshiyuki Kageyama ◽  
Tomonori Ikegami ◽  
Natsuko Hiramatsu ◽  
Sadamu Takeda ◽  
Tadashi Sugawara
Keyword(s):  
Carboxylic Acids ◽  
Self Assembly ◽  
Growth Behavior ◽  
Aliphatic Acids ◽  
Continuous Formation ◽  
Medium Length

Medium-length aliphatic acids promote the continuous formation of helical self-assembly of oleate.

3D Anhydrous Proton-Transporting Nanochannels Formed by Self-Assembly of Liquid Crystals Composed of a Sulfobetaine and a Sulfonic Acid

2013 ◽  
Vol 135 (41) ◽  
pp. 15286-15289 ◽  
Author(s):  
Bartolome Soberats ◽  
Masafumi Yoshio ◽  
Takahiro Ichikawa ◽  
Satomi Taguchi ◽  
Hiroyuki Ohno ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Sulfonic Acid

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.

The Activation of Carboxylic Acids via Self-Assembly Asymmetric Organocatalysis: A Combined Experimental and Computational Investigation

2016 ◽  
Vol 138 (44) ◽  
pp. 14740-14749 ◽  
Author(s):  
Mattia Riccardo Monaco ◽  
Daniele Fazzi ◽  
Nobuya Tsuji ◽  
Markus Leutzsch ◽  
Saihu Liao ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Self Assembly ◽  
Computational Investigation ◽  
Asymmetric Organocatalysis

Discotic liquid crystals of transition metal complexes 38†: peripheral chain substituent position effect on columnar mesophase and stacking structures of novel phthalocyanine-based liquid crystals

2007 ◽  
Vol 11 (07) ◽  
pp. 503-512 ◽  
Author(s):  
Masahiro Ichihara ◽  
Ayumi Suzuki ◽  
Kazuaki Hatsusaka ◽  
Kazuchika Ohta
Keyword(s):  
Liquid Crystals ◽  
Position Effect ◽  
Optical Microscope ◽  
Central Core ◽  
Ortho Position ◽  
Discotic Liquid Crystals ◽  
Isotropic Liquid ◽  
X Ray ◽  
Phenoxy Group ◽  
Columnar Mesophases

In order to clarify the peripheral chain substitution position effect on columnar mesophase and stacking structures, we have synthesized three novel series of discotic liquid crystals (1-3) having octakis(phenoxy)phthalocyaninato copper(II) as a central core and one peripheral chain at the para position (1), meta position (2) or ortho position (3) of each phenoxy group, and three more novel series of discotic liquid crystals (4-6) having the same central core and two peripheral chains at para and meta positions (4), meta and meta positions (5) or ortho and meta positions (6) of each phenoxy group. Their columnar mesophase and stacking structures were investigated with a polarizing optical microscope, a differential scanning calorimeter and a temperature-dependent X-ray diffractometer. According to the results, their columnar mesophase and stacking structures strongly depended on the peripheral chain substitution positions and the number of peripheral chains. Derivatives 3 and 5 are viscous isotropic liquid at room temperature. Derivatives 1, 2, 4 and 6 exhibit various kinds of columnar mesophases: 1 Colhd; 2 Colhd and Colho; 4 Colhd, Colrd(P21/a), Coltet.d and Cub ( Pn [ three bar ] m ); 6 Colhd, Colrd(P21/a) and Colrd(X). Moreover, derivatives 1, 4 and 6 exhibit disordered columnar mesophases. However, derivative 2 only exhibits an ordered columnar mesophase and its X-ray diffraction pattern shows a sharp reflection corresponding to a very short intracolumnar stacking distance of 3.33 Å. Thus, we can drastically change the mesophase and stacking structures by the peripheral chain substitution positions and the number of peripheral chains at each phenoxy group. This is a new way of controlling mesomorphic structure.

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