The relationship between molecular symmetry and second-rank orientational order parameters for molecules in chiral liquid crystalline solvents

1999 ◽  
Vol 111 (15) ◽  
pp. 6890-6896 ◽  
Author(s):  
Denis Merlet ◽  
James W. Emsley ◽  
Philippe Lesot ◽  
Jacques Courtieu
Keyword(s):  
Liquid Crystalline ◽  
Orientational Order ◽  
Order Parameters ◽  
Molecular Symmetry ◽  
The Relationship

scholarly journals Raman scattering studies of order parameters in liquid crystalline dimers exhibiting the nematic and twist-bend nematic phases

2015 ◽  
Vol 3 (38) ◽  
pp. 10007-10016 ◽  
Author(s):  
Zhaopeng Zhang ◽  
Vitaly P. Panov ◽  
Mamatha Nagaraj ◽  
Richard J. Mandle ◽  
John W. Goodby ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Raman Scattering ◽  
Homologous Series ◽  
Liquid Crystalline ◽  
Orientational Order ◽  
Order Parameters ◽  
Polarized Raman Spectroscopy ◽  
Nematic Phases ◽  
Polarized Raman

The work deduces orientational order parameters in the nematic and twist-bend nematic phases. An homologous series of dimers is studied using Polarized Raman Spectroscopy.

Molecular Polarizabilities and Orientational Ordering of Two Mesogens

1991 ◽  
Vol 46 (10) ◽  
pp. 858-864 ◽  
Author(s):  
M. Mitra ◽  
S. Paul ◽  
R. Paul
Keyword(s):  
Field Theory ◽  
Liquid Crystalline ◽  
Mean Field Theory ◽  
Orientational Order ◽  
Mean Field ◽  
Continuum Theory ◽  
Order Parameters ◽  
Liquid Phases ◽  
Molecular Polarizabilities ◽  
The Mean

AbstractThe refractive indices (no, ne) and densities of two mesogens have been measured in their liquid crystalline and liquid phases. The molecular polarizabilities (xo, xe) were evaluated by Vuks' and Neugebauer's relations. The polarizabilities thus obtained are compared with those estimated from the bond polarizabilities, and the orientational order parameters, <P2>, are compared with the mean field theory of Maier and Saupe, the modified mean field theory of Humphries, James and Luckhurst. and the continuum theory suggested by T. E. Faber. We have also calculated the three order parameters (<P2), τ, σ) describing the smectic A phase following McMillan's model. Possible causes of the discrepancy are discussed.

Polarized fluorescence and orientational order parameters of a liquid-crystalline conjugated polymer

1999 ◽  
Vol 60 (1) ◽  
pp. 277-283 ◽  
Author(s):  
B. Schartel ◽  
V. Wachtendorf ◽  
M. Grell ◽  
D. D. C. Bradley ◽  
M. Hennecke
Keyword(s):  
Conjugated Polymer ◽  
Liquid Crystalline ◽  
Orientational Order ◽  
Order Parameters ◽  
Polarized Fluorescence

scholarly journals Liquid Crystal Ordering in the Hexagonal Phase of Rod-Coil Diblock Copolymers

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1262
Author(s):  
Mikhail A. Osipov ◽  
Maxim V. Gorkunov ◽  
Alexander A. Antonov
Keyword(s):  
Liquid Crystal ◽  
Order Parameter ◽  
Density Functional ◽  
Diblock Copolymers ◽  
Microphase Separation ◽  
Hexagonal Phase ◽  
Orientational Order ◽  
Order Parameters ◽  
Copolymer Composition ◽  
Rigid Rod

Density functional theory of rod-coil diblock copolymers, developed recently by the authors, has been generalised and used to study the liquid crystal ordering and microphase separation effects in the hexagonal, lamellar and nematic phases. The translational order parameters of rod and coil monomers and the orientational order parameters of rod-like fragments of the copolymer chains have been determined numerically by direct minimization of the free energy. The phase diagram has been derived containing the isotropic, the lamellar and the hexagonal phases which is consistent with typical experimental data. The order parameter profiles as functions of temperature and the copolymer composition have also been determined in different anisotropic phases. Finally, the spatial distributions of the density of rigid rod fragments and of the corresponding orientational order parameter in the hexagonal phase have been calculated.

scholarly journals On the relationship between NMR-derived amide order parameters and protein backbone entropy changes

2015 ◽  
Vol 83 (5) ◽  
pp. 922-930 ◽  
Author(s):  
Kim A. Sharp ◽  
Evan O'Brien ◽  
Vignesh Kasinath ◽  
A. Joshua Wand
Keyword(s):  
Order Parameters ◽  
Protein Backbone ◽  
Entropy Changes ◽  
The Relationship

Magnetoviscosity and orientational order parameters of dilute ferrofluids

2002 ◽  
Vol 116 (20) ◽  
pp. 9078-9088 ◽  
Author(s):  
Patrick Ilg ◽  
Martin Kröger ◽  
Siegfried Hess
Keyword(s):  
Orientational Order ◽  
Order Parameters
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