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Special Issue "Liquid Crystals 2011"

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A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 June 2011)

Special Issue Editor

Guest Editor
Prof. Dr. Wolfgang Haase

Technische Universität Darmstadt, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Petersenstrasse 20, D-64287 Darmstadt, Germany
Website | E-Mail
Fax: +49 6151 16 4924
Interests: liquid crystals; molecular magnetism; bioinorganic chemistry; nonlinear optics of functonal polymers

Special Issue Information

Dear Colleagues,

A Liquid Crystal can be considered as a truly multifunctional material being a thermotropic or lyotropic anisotropic fluid. Applications for Liquid Crystal Displays, for Photonics, for a broad range of Devices and Switchers, even for Analytical Tools or their functionalities in Life Science etc. are based essential on such anisotropic properties. The field of anisotropic properties is very rich, the physics of such anisotropic fluids is a hot topic, their design and chemical realization is still a challenge.
Basically most of the Liquid Crystals consist of All-Organic Compounds, but their existence is not restricted on those. By introducing closed or open shell metals as constitutive element the very interesting field of Metallomesogens opens a lot of pronounced and new properties.
Functionalized Nanomaterials doped in Liquid Crystals as for instance Au, BaTiO3, SWCNTs or MWCNTs lead to Nanocolloids with enhanced or quite new properties allowing nanostructuring.
Contributions to topics addressed above but not necessary limited are desirable.

Prof. Dr. W. Haase
Guest Editor

Keywords

  • anisotropic properties of liquid crystals in a broader sense
  • structural and chemical properties of liquid crystals
  • liquid crystals with special magnetic properties
  • liquid crystalline nanocolloids and LC-nanostructered systems
  • display related properties

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Published Papers (1 paper)

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Research

Open AccessArticle Effect of Molecular Flexibility on the Nematic-to-Isotropic Phase Transition for Highly Biaxial Molecular Non-Symmetric Liquid Crystal Dimers
Materials 2011, 4(10), 1632-1647; doi:10.3390/ma4101632
Received: 22 August 2011 / Revised: 2 September 2011 / Accepted: 19 September 2011 / Published: 27 September 2011
Cited by 11 | PDF Full-text (1102 KB) | HTML Full-text | XML Full-text
Abstract
In this work, a study of the nematic (N)–isotropic (I) phase transition has been made in a series of odd non-symmetric liquid crystal dimers, the α-(4-cyanobiphenyl-4’-yloxy)-ω-(1-pyrenimine-benzylidene-4’-oxy) alkanes, by means of accurate calorimetric and dielectric measurements. These materials are potential candidates to present the
[...] Read more.
In this work, a study of the nematic (N)–isotropic (I) phase transition has been made in a series of odd non-symmetric liquid crystal dimers, the α-(4-cyanobiphenyl-4’-yloxy)-ω-(1-pyrenimine-benzylidene-4’-oxy) alkanes, by means of accurate calorimetric and dielectric measurements. These materials are potential candidates to present the elusive biaxial nematic (NB) phase, as they exhibit both molecular biaxiality and flexibility. According to the theory, the uniaxial nematic (NU)–isotropic (I) phase transition is first-order in nature, whereas the NB–I phase transition is second-order. Thus, a fine analysis of the critical behavior of the N–I phase transition would allow us to determine the presence or not of the biaxial nematic phase and understand how the molecular biaxiality and flexibility of these compounds influences the critical behavior of the N–I phase transition. Full article
(This article belongs to the Special Issue Liquid Crystals 2011)
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