Molecular shape and volume effects on the orientational ordering of simple liquid crystals

1977 ◽  
Vol 67 (12) ◽  
pp. 5795-5801 ◽  
Author(s):  
Barbara A. Baron ◽  
William M. Gelbart
Keyword(s):  
Liquid Crystals ◽  
Molecular Shape ◽  
Simple Liquid ◽  
Orientational Ordering ◽  
Volume Effects

Orientational ordering of ferroelectric thiobenzoate liquid crystals

1990 ◽  
Vol 8 (5) ◽  
pp. 687-699 ◽  
Author(s):  
Wolfgang Richter ◽  
Dirk Reimer ◽  
B. M. Fung ◽  
R. J. Twieg ◽  
K. Betterton
Keyword(s):  
Liquid Crystals ◽  
Orientational Ordering

scholarly journals Monte Carlo simulation of smectic liquid crystals and the electroclinic effect: The role of molecular shape

1999 ◽  
Vol 60 (5) ◽  
pp. 5584-5590 ◽  
Author(s):  
Jianling Xu ◽  
Robin L. B. Selinger ◽  
Jonathan V. Selinger ◽  
B. R. Ratna ◽  
R. Shashidhar
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Liquid Crystals ◽  
Molecular Shape ◽  
Smectic Liquid Crystals

Molecular flexibility and orientational ordering of nematic liquid crystals

1991 ◽  
Vol 94 (4) ◽  
pp. 2758-2772 ◽  
Author(s):  
Demetri J. Photinos ◽  
Edward T. Samulski ◽  
Hirokazu Toriumi
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Molecular Flexibility ◽  
Orientational Ordering

scholarly journals Discotic liquid crystals of transition metal complexes 51: Synthesis and mesomorphism of flat-pumpkin-shaped phthalocyanine-fullerene dyads

2014 ◽  
Vol 18 (10n11) ◽  
pp. 856-868 ◽  
Author(s):  
Miho Yoshioka ◽  
Kazuchika Ohta ◽  
Yohei Miwa ◽  
Shoichi Kutsumizu ◽  
Mikio Yasutake
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Thermal Fluctuation ◽  
Molecular Shape ◽  
Optical Microscope ◽  
Excluded Volume ◽  
Discotic Liquid Crystals ◽  
X Ray ◽  
Donor Acceptor ◽  
Liquid Crystalline Material

We have synthesized a novel type of donor–acceptor liquid crystalline material, phthalocyanine-fullerene ( Pc - C 60) dyad, [m,p,m′-( C 14 O )3 PhO ]6 PcCu - C 60 (7), and the Pc precursors, [m,p,m′-( C 14 O )3 PhO ]6 PcCu - OFBA (6) and [m,p,m′-( C 14 O )3 PhO ]6 PcCu - OH (5), and established their mesomorphism by using a polarizing optical microscope, a differential scanning calorimeter and a small angle X-ray diffractometer. Very interestingly, their corresponding previous parent Pc derivative, [m,p,m′-( C 14 O )3 PhO ]8 PcCu (4), shows a very wide temperature region ca. 90°C of a bicontinuous Cub(Pn3m) mesophase, whereas the present children Pc precursors (5 and 6) and Pc- C 60 dyad 7 show not the Cub mesophase but a Colho mesophase. It is also noteworthy that the staking distance in the Colho mesophase of the Pc- C 60 dyad 7was a very big value of ca. 9.1 Å, which is the biggest in discotic liquid crystals to our best knowledge. It may be originated from the biggest excluded volume caused by thermal fluctuation of peripheral long alkoxy chains at m, m′-positions. The excluded volume caused by thermal fluctuation of the peripheral long chains is so big that the molecular shape of the Pc derivative 4 and the Pc- C 60 dyad 7 very resembles a flat pumpkin.

The orientational ordering of solute molecules in nematic solvents: cyanobenzenes, bromobenzenes, and p-benzoquinone in EBBA and 1132

1990 ◽  
Vol 68 (6) ◽  
pp. 875-880 ◽  
Author(s):  
C. T. Yim ◽  
D. F. R. Gllson
Keyword(s):  
Liquid Crystals ◽  
Potential Energy ◽  
Electric Field Gradient ◽  
Short Range ◽  
Orientational Order ◽  
Short Range Interaction ◽  
Range Interaction ◽  
Average Electric Field ◽  
Orientational Ordering ◽  
Shape And Size

The orientational order parameters of benzonitrile and o-, m-, and p-dicyanobenzene, monobromo- and p-dibromobenzene, and p-benzoquinone, dissolved in two nematic solvents, 1132 and EBBA, have been measured as functions of temperature, and used to determine the potential energy parameters for each solute–solvent pair. These parameters have been correlated with a short-range interaction based upon a shape and size function of the solute molecule and a long-range contribution due to the interaction between the solute molecular quadrupole moment and the average electric field gradient. Keywords: nematic liquid crystals, orientational ordering of solutes.

N.M.R. studies of orientational ordering in liquid crystals at high pressure

1982 ◽  
Vol 46 (3) ◽  
pp. 659-664 ◽  
Author(s):  
J.W. Emsley ◽  
G.R. Luckhurst ◽  
B.A. Timimi
Keyword(s):  
High Pressure ◽  
Liquid Crystals ◽  
Orientational Ordering

Orientational ordering in liquid crystals: isotope labelling neutron diffraction experiments

1992 ◽  
Vol 76 (4) ◽  
pp. 951-977 ◽  
Author(s):  
R.W. Date ◽  
I.W. Hamley ◽  
G.R. Luckhurst ◽  
J.M. Seddon ◽  
R.M. Richardson
Keyword(s):  
Liquid Crystals ◽  
Neutron Diffraction ◽  
Isotope Labelling ◽  
Orientational Ordering
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