scholarly journals Flying-seed-like liquid crystals. Part 4: a novel series of bulky substituents inducing mesomorphism instead of using long alkyl chains

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13828-13839 ◽  
Author(s):  
Miho Yoshioka ◽  
Kazuchika Ohta ◽  
Mikio Yasutake
Keyword(s):  
Liquid Crystals ◽  
Methoxy Group ◽  
Phenoxy Group ◽  
Alkyl Chains

We have synthesized a novel series of flying-seed-like liquid crystals substituted by bulky groups instead of using long alkyl chains. The derivatives having methoxy group(s) at the meta position(s) of a phenoxy group tend to show mesophase(s).

The effect of a lateral methoxy group on the mesomorphic properties of ferroelectric liquid crystals

1995 ◽  
Vol 19 (6) ◽  
pp. 775-778 ◽  
Author(s):  
M. Kašpar ◽  
H. Sverenyák ◽  
V. Hamplová ◽  
M. Glogarová ◽  
S. A. Pakhomov ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Methoxy Group ◽  
Ferroelectric Liquid Crystals ◽  
Mesomorphic Properties

The influence of multiple alkyl chains on mesomorphic and photophysical properties of diphenylacrylonitrile liquid crystals

2019 ◽  
Vol 47 (7) ◽  
pp. 967-976 ◽  
Author(s):  
Liangbin Lin ◽  
Wenwei Qin ◽  
Bifeng Cheng ◽  
Hongyu Guo ◽  
Fafu Yang
Keyword(s):  
Liquid Crystals ◽  
Photophysical Properties ◽  
Alkyl Chains

Switching of ionic conductivities in columnar liquid-crystalline anilinium salts: effects of alkyl chains, ammonium cations and counter anions on thermal properties and switching temperatures

2019 ◽  
Vol 4 (2) ◽  
pp. 342-347 ◽  
Author(s):  
Daniel Kuo ◽  
Bartolome Soberats ◽  
K. R. S. Kumar ◽  
Masafumi Yoshio ◽  
Takahiro Ichikawa ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Ionic Conductivities ◽  
Molecular Structures ◽  
Switching Behavior ◽  
Alkyl Chains ◽  
Ion Conductivities ◽  
Thermal Switching

Effects of molecular structures on the thermal switching behavior of ion conductivities for columnar anilinium liquid crystals have been examined.

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.

Trimeric liquid crystals containing lateral alkyl chains

1989 ◽  
Vol 6 (4) ◽  
pp. 387-390 ◽  
Author(s):  
G. S. Attard ◽  
C. T. Imrie
Keyword(s):  
Liquid Crystals ◽  
Alkyl Chains

scholarly journals Flying-seed-like liquid crystals 3: new guideline for the induction of mesomorphism by using bulky groups instead of long alkyl chains

2013 ◽  
Vol 1 (34) ◽  
pp. 5315 ◽  
Author(s):  
Ayaha Hachisuga ◽  
Miho Yoshioka ◽  
Kazuchika Ohta ◽  
Tomoyuki Itaya
Keyword(s):  
Liquid Crystals ◽  
Alkyl Chains

Dynamics and ionic conductivity of ionic liquid crystals forming a hexagonal columnar mesophase

2018 ◽  
Vol 20 (8) ◽  
pp. 5626-5635 ◽  
Author(s):  
Arda Yildirim ◽  
Paulina Szymoniak ◽  
Kathrin Sentker ◽  
Martin Butschies ◽  
Andrea Bühlmeyer ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystals ◽  
Ionic Conductivity ◽  
Specific Heat ◽  
Molecular Mobility ◽  
Alkyl Chains ◽  
Ionic Liquid Crystals ◽  
First Time ◽  
Hexagonal Columnar ◽  
Specific Heat Spectroscopy

For the first time, the molecular mobility of two linear-shaped tetramethylated guanidinium triflate ionic liquid crystals (ILCs) having different lengths of alkyl chains was investigated using a combination of broadband dielectric (BDS) and specific heat spectroscopy (SHS).

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