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Article
Laterally attached liquid-crystalline polymers as stationary phases. Effect of temperature in RP HPLC and comparison with a commercial C18 stationary phase
Specific side-on-fixed liquid-crystalline polymers (SOLCP) have been synthesized for use in silica-modified stationary phases in high-performance liquid chromatography (HPLC). The mesogenic side group of the S...
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Article
Correlation between hydrophobic and molecular shape descriptors and retention data of polycyclic aromatic hydrocarbons in reversed-phase chromatography on non-liquid-crystalline, nematic, and smetic stationary phases
The local anisotropic ordering of side-chain liquid-crystalline polymer (SCLCP) stationary phases has been revealed statistically. For this purpose the RP HPLC separation of polycyclic aromatic hydrocarbons (P...
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Article
Retention behavior of polycyclic aromatic hydrocarbons in supercritical fluid chromatography on a chemically bonded stationary phases based upon liquid-crystalline polymer
The retention behavior of a set of polycyclic aromatic hydrocarbons in supercritical fluid chromatography have been studied on a chemically bonded stationary phase based upon a side chain liquid crystalline po...
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Article
Strong anisotropic nematic order in liquid crystal polymers: [4] a quasi-elastic neutron scattering study
From quasi-elastic neutron scattering experiments performed in glassy, nematic and isotropic phases, the dynamics of oriented samples of strong anisotropic side-on fixed liquid crystal polymers have been analy...
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Article
Competition in low ordered smectics between incommensurate phases and two-dimensional modulated ones for dimesogenic compounds
Systematic physical chemistry studies are in progress concerning the occurrence of incommensurate low ordered smectic phases in non-symmetric dimesogens varying molecular par...
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Chapter
Phase Behavior of High- and Low-Molar-Mass Liquid Crystal Mixtures
Over the past twenty years a rough estimate of the literature related to the physics and chemistry of liquid crystalline mixtures amounts to 5000 references! Our purpose is thus neither to present an exhaustiv...
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Chapter
Conformation of a Polymer in Liquid Crystal Polymer
A side-chain liquid crystal polymer is a polymer where on each monomer is grafted a mesogenic molecule. A good example is given by the liquid crystal derived from poly(methyl methacrylate):
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Chapter
How the Smectic a Phase Adapts to two Incommensurate Periods in Asymmetric Liquid Crystalline Systems
Asymmetric polar rod-like mesogens induce antiferroelectric associations which play a special role in the structure of layered liquid crystalline phases introducing a second period most often incommensurate wi...
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Chapter
The Fluid Mesophases of Polar Pods
We report various unexpected polymorphisms of fluid mesophases revealed in pure or mixed cyano or nitro rod-like derivatives.
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Chapter and Conference Paper
X-Ray Investigations of the Smectic A1 — Smectic A2 Transition
The existence in a binary system constituted of a three phenyl ring cyano compound mixed with TBBA (p=latm) of a smectic A-smectic A transition line has been reported [1]. By microscopic observation, it is imp...
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Chapter and Conference Paper
Influence of a Smectic Phase on Thermodynamical Behaviour of the Nematic to Isotropic Phase Transition
From an experimental point of view it does not seem to exist a straightforward relationship between the transition entropy ΔSNI and the orientational order parameter discontinuity ΔηNI at the nematic-isotropic tr...
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Chapter and Conference Paper
Occurrence of Reentrant Nematic and Reentrant Smectic A Phases in Some Liquid Crystal Series
The first pure compound exhibiting at atmospheric pressure a stable reentrant nematic but also a reentrant smectic A phase was discovered a few months ago [1]. The nature of these phases was confirmed in parti...
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Chapter and Conference Paper
X-Ray Studies of Reentrant Nematic and Smectic A Phases in Pure Compounds at Atmospheric Pressure
In the 4-N-alkyloxybenzoyloxy-4′-cyanostiLbenes series for the n=8 compound has been reported the evidence of the original tetramorphism (1):
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Chapter and Conference Paper
X-Ray Investigations and Magnetic Field Effects on a Fluid Mesophase of Disk-Like Molecules
The X-ray diffraction patterns of the fluid phase of two alkoxy benzoates of triphenylene have been investigated: for non oriented sample, this pattern is very similar to the isotropic liquid one, since we observ...
