Singular Elastic Properties of Mixtures with the Re-entrant Nematic Phase
Grzegorz Czechowski,Jan Jadżyn +1 more
TLDR
In this article, the temperature behavior of the splay and bend elastic constants measured for n-hexyloxycyanobiphenyl and noctyloxycyclanobinhibenyl mixtures was analyzed.Abstract:
The paper presents temperature behavior of the splay and bend elastic constants measured for n-hexyloxycyanobiphenyl and noctyloxycyanobiphenyl mixtures — a system exhibiting the re-entrant nematic phase. It was shown that singularities in the elastic properties of the system concern not only the nematic phase (the well-known pre-smectic effects) but first of all — the smectic A phase, in which the splay and bend deformations, normally not allowed for the layered structures, can be induced.read more
Citations
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Optical, dielectric and visco-elastic properties of a few hockey stick-shaped liquid crystals with a lateral methyl group
TL;DR: In this paper, the rotational viscosity coefficient of a few hockey stick-shaped compounds 4-(3n-alkyloxy-2-methyl-phenyliminomethyl)phenyl 4-nalkyloxyloxycinnamates with a lateral methyl group inserted between the malkylope chain and the azomethine connecting group was measured.
Journal ArticleDOI
Rotational viscosity measurements of bent-core nematogens
TL;DR: In this paper, two simple but precise probing methods have been utilized to investigate the influence of structure, properties and molecular association on the director response time (τ0) and hence on the rotational viscosity (γ1) in the nematic phase of three 4-cyanoresorcinol bent-core derivatives (1/7, 1/9 and 1/10) having different terminal chain lengths.
Journal ArticleDOI
Refractive index and orientational order parameter of a polar–polar binary system showing induced smectic Ad and re-entrant nematic phases
TL;DR: Refractive index measurements have been done on a polar-polar binary system, 4-cyanophenyl [4′(4″-n-heptylphenyl)] benzoate (7CPB), exhibiting nematic-smectic Ad-re-entrant nematic phase sequence using thin prism technique as mentioned in this paper.
Journal ArticleDOI
Influence of spacer and flexible chain on polymorphism in complementary hydrogen bonded liquid crystal dimers, SA:nOBAs
TL;DR: In this article, the soft-covalent interaction between aliphatic non-mesogenic succinic acid and mesogenic n-palkoxy benzoic acids for n = 10, 11 and 12 was investigated.
Journal ArticleDOI
Design, synthesis and characterization of a linear hydrogen bonded homologous series exhibiting reentrant smectic C ordering
C. Kavitha,M. L. N. Madhu Mohan +1 more
TL;DR: In this article, the design, synthesis and characterization of seven linear hydrogen-bonded liquid crystal complexes derived from mesogenic p-n -decyloxy benzoic acid and p−n -alkyl benzzoic acids designated as 10OOn are reported.
References
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Book
The physics of liquid crystals
P. G. de Gennes,Richard Alben +1 more
TL;DR: In this paper, the authors define an order parameter statistical theories of the nematic order phenomonological description of the nematic-isotopic mixtures and describe the properties of these mixtures.
MonographDOI
Handbook of liquid crystals
John W. Goodby,Peter J. Collings,Takashi Kato,Carsten Tschierske,Helen F. Gleeson,Peter Raynes +5 more
TL;DR: In this article, the basic principles of both low and high-molecular weight materials, as well as the synthesis, characterization, modification, and applications of all types of liquid crystals are discussed.
BookDOI
Liquid crystals and ordered fluids
TL;DR: In this paper, the authors present a NMR study of the transition of a mixture of two Isomeric Cyano-Ester homologous series, showing that the phase transition of one of the two isomeric versions of this series is a transition of the other.
Journal ArticleDOI
New Liquid-Crystal Phase Diagram
TL;DR: The nematic phase occurs at both a higher and a lower temperature than the smectic phase as mentioned in this paper, and measurements of the bend elastic constant as a function of concentration are presented.
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