Extraordinary magnetic field effects on the LC phases of homochiral and racemic 4-cyanoresorcinol-based diamagnetic bent-core mesogens

2021 ◽  
Vol 9 (6) ◽  
pp. 1895-1910
Author(s):  
Hale Ocak ◽  
Belkız Bilgin Eran ◽  
Sevgi Nuray ◽  
Aykun Özkonstanyan ◽  
Silvio Poppe ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Liquid Crystalline ◽  
Racemic Mixture ◽  
Magnetic Field Effects ◽  
Chiral Compound ◽  
Crystalline Phases ◽  
Layer Spacing ◽  
Field Effects ◽  
Liquid Crystalline Phases

A huge effect of a magnetic field on the layer spacing of smectic and polar smectic liquid crystalline phases of a diamagnetic bent-core mesogen is reported, which is opposite for the uniformly chiral compound and its racemic mixture.

Single crystal X-ray structure determination and temperature-dependent structural studies of the smectogenic compound 7OS5

2020 ◽  
Vol 76 (6) ◽  
pp. 1128-1135
Author(s):  
Aleksandra Deptuch ◽  
Teresa Jaworska-Gołąb ◽  
Joachim Kusz ◽  
Maria Książek ◽  
Keigo Nagao ◽  
...  
Keyword(s):  
Single Crystal ◽  
Homologous Series ◽  
Liquid Crystalline ◽  
Temperature Phase ◽  
Smectic Layer ◽  
X Ray Diffraction ◽  
Crystalline Phases ◽  
Layer Spacing ◽  
X Ray ◽  
Liquid Crystalline Phases

Structural characteristics of solid and liquid crystalline phases of 7OS5 (4-n-pentylphenyl-4′-n-heptyloxythiobenzoate), the achiral smectogenic mesogen with the shortest terminal carbon chain in the nOS5 homologous series, are studied by complementary methods. Simultaneously perfomed X-ray diffraction and differential scanning calorimetry occur to be a powerful tool to study metastable phases. The single crystal structure of a high-temperature phase, supercooled from the room temperature down to −183°C [orthorhombic crystal system; space group Pca21; a = 54.285 (5) Å, b = 5.5843 (3) Å, c = 14.841 (1) Å, Z = 8] is determined. Lamellar ordering of elongated molecules is stabilized by hydrogen bonds . Temperature dependence of unit-cell parameters in two crystal phases as well as structural parameters of liquid crystalline phases (smectic layer spacing, tilt angle, average distance between the long axes of molecules and correlation lengths) are determined by X-ray diffraction. The obtained results are compared with the data available for other compounds in the nOS5 homologous series.

Twist Grain Boundary Liquid-Crystalline Phases under the Effect of the Magnetic Field: A Complete2H and13C NMR Study

ChemPhysChem ◽  
2008 ◽  
Vol 9 (4) ◽  
pp. 556-566 ◽  
Author(s):  
Valentina Domenici ◽  
Carlo Alberto Veracini ◽  
Vladimira Novotná ◽  
Ronald Y. Dong
Keyword(s):  
Magnetic Field ◽  
Grain Boundary ◽  
Liquid Crystalline ◽  
Crystalline Phases ◽  
Nmr Study ◽  
Liquid Crystalline Phases ◽  
The Magnetic Field

Pressure and magnetic field effects on ferroelastic and antiferromagnetic orderings in honeycomb-lattice Mn2V2O7

2020 ◽  
Vol 102 (7) ◽  
Author(s):  
H. C. Wu ◽  
D. J. Hsieh ◽  
T. W. Yen ◽  
P. J. Sun ◽  
D. Chandrasekhar Kakarla ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Honeycomb Lattice ◽  
Magnetic Field Effects ◽  
Field Effects

Magnetic field effects in rigidly linked D-A dyads: Extreme on-resonance quantum coherence effect on charge recombination

2019 ◽  
Vol 151 (24) ◽  
pp. 244308 ◽  
Author(s):  
David Mims ◽  
Alexander Schmiedel ◽  
Marco Holzapfel ◽  
Nikita N. Lukzen ◽  
Christoph Lambert ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Coherence ◽  
Charge Recombination ◽  
Magnetic Field Effects ◽  
Field Effects ◽  
Coherence Effect
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