Microscopic ordering in smectic phases of liquid crystals

1990 ◽  
Vol 51 (18) ◽  
pp. 2015-2022 ◽  
Author(s):  
M. Zgonik ◽  
M. Rey-Lafon ◽  
C. Destrade ◽  
C. Leon ◽  
H.T. Nguyen
Keyword(s):  
Liquid Crystals ◽  
Smectic Phases

Evidence of two new ordered smectic phases in ferroelectric liquid crystals

1978 ◽  
Vol 39 (5) ◽  
pp. 548-553 ◽  
Author(s):  
J. Doucet ◽  
P. Keller ◽  
A.M. Levelut ◽  
P. Porquet
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Smectic Phases

Azo-containing asymmetric bent-core liquid crystals with modulated smectic phases

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 64886-64891 ◽  
Author(s):  
Nemanja Trišović ◽  
Jelena Antanasijević ◽  
Tibor Tóth-Katona ◽  
Michal Kohout ◽  
Miroslaw Salamonczyk ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Synthesis And Characterization ◽  
Temperature Range ◽  
Smectic Phases ◽  
Potential Applications

We present the synthesis and characterization of ten asymmetric bent-core liquid crystals with enantiotropic modulated smectic (B7 type) phases. Their relatively low and wide photosensitive mesomorphic temperature range offers potential applications.

Polymer Liquid Crystals and Their Blends: A Hierarchy of Structures

1991 ◽  
Vol 255 ◽  
Author(s):  
Witold Brostow ◽  
Michael Hess
Keyword(s):  
Liquid Crystals ◽  
Building Materials ◽  
Computer Modelling ◽  
Hierarchical Structures ◽  
Building Blocks ◽  
Molecular Structures ◽  
Polymer Liquid ◽  
Phase Structures ◽  
Smectic Phases ◽  
Polymer Liquid Crystals

AbstractHierarchical structures are possible in polymer liquid crystals (PLCs) since each molecule contains at least two kinds of building blocks that are not homeomorphic to each other. We discuss some examples of molecular structures and phase structures of monomer liquid crystals (MLCs) and PLCs: smectic phases formed by interdigitated MLC molecules; PLC molecule classification based on increasing complexity – and its consequences on properties of the materials; and formation and phase structures of LC-rich islands in PLCs and in PLC blends. Some rules pertaining to hierarchical structures are formulated. The knowledge of hierarchies is neccessary – but not sufficient – for intelligent procesing of PLCs and their blends and for achieving properties defined in advance. Computer modelling represents another important element of building materials to order.

Order Parameter and Molecular Polarizabilities of Liquid Crystals with Nematic and Smectic Phases

1983 ◽  
Vol 91 (1-2) ◽  
pp. 97-113 ◽  
Author(s):  
A. Hauser ◽  
G. Pelzl ◽  
C. Selbmann ◽  
D. Demus ◽  
S. Grande ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Order Parameter ◽  
Smectic Phases ◽  
Molecular Polarizabilities

Electron Nuclear Double Resonance (ENDOR) Investigations of Organic Doublet Radicals in the Nematic and Smectic Phase of Liquid Crystals

1980 ◽  
Vol 34 (3) ◽  
pp. 305-310 ◽  
Author(s):  
B. Kirste ◽  
H. Kurreck
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Hyperfine Interactions ◽  
Double Resonance ◽  
Electron Nuclear Double Resonance ◽  
Smectic A ◽  
Smectic Phases ◽  
Anisotropic Hyperfine ◽  
Different Types ◽  
Nematic Phases

Different types of organic doublet radicals have been investigated in isotropic, nematic, and smectic phases of liquid crystals by performing electron nuclear double resonance (ENDOR), general TRIPLE and special TRIPLE experiments. For this purpose phenalenyls (perinaphthenyls), galvinoxyl, tetra- tert.-butylcarbazolyl, and bis(biphenylenyl)propenyl radicals have been chosen including some partially deuterated and 13C-labeled compounds. Anisotropic hyperfine interactions and deuterium quadrupole couplings could be determined. Smectic A phases have proved to be advantageous as compared to nematic phases in these studies. Detailed information about the orientation of the radicals within the liquid-crystalline solvent and about the conformations of the radicals could be obtained.

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