96693-05-9Relevant articles and documents
Synthesis and Characterization of a New Series of Paramagnetic Ferroelectric Liquid Crystalline Nitroxide Radicals
Uchida, Yoshiaki,Tamura, Rui,Suzuki, Katsuaki,Takahashi, Hiroki,Aoki, Yoshio,Nohira, Hiroyuki
, p. 89 - 106 (2015/09/01)
A new series of all-organic liquid-crystalline (LC) chiral radical compounds,trans-1-alkoxyphenyl-4-[(4-(4-alkoxyphenyl)-2,5-dimethylpyrrolidine-1-oxy-2-yl)-benzylideneamino]benzenes (1) with various alkyl chains, containing a chiral nitroxide unit in the mesogen core were synthesized and their LC properties were fully characterized. The enantiomerically enriched compounds (2S,5S)-1 showed N, TGBA, SmA and SmC phases, while the racemates (±)-1 exhibited N, SmA and SmC phases. The phase transition behavior and the ferroelectric properties of the SmC phase of (2S,5S)-1 differed from those of previously reported analogues with an ester group as a substitute for the imino group of (2S,5S)-1. Some of the (2S,5S)-1 series showed a temperature-dependent spontaneous polarization PS (θ) inversion. We discuss the origin of this difference in terms of their molecular structures optimized by molecular orbital calculations. The phase transition behavior supports the hypothesis that the large φ, which is defined as the angle between the molecular long axis (one of the principal axes of inertia) and the direction of the dipole moment in each molecule, results in the stabilization of the SmA (SmA) phase.
Tuning 'de Vries-like' properties in binary mixtures of liquid crystals with different molecular lengths
Song, Qingxiang,Bogner, Andreas,Giesselmann, Frank,Lemieux, Robert P.
supporting information, p. 8202 - 8204 (2013/09/12)
Smectic liquid crystals with 'de Vries-like' properties are characterized by a maximum layer contraction of ≤1% upon transition from the orthogonal SmA phase to the tilted SmC phase. We show that binary mixtures of 'de Vries-like' and conventional SmC mesogens with a molecular length ratio of 1.34 undergo a SmA-SmC phase transition with a maximum layer contraction ranging from 1.0 to 1.9% depending on the mixture composition.
Metal-containing dendrimers
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, (2009/09/29)
This invention relates to a light emitting device which comprises at least one layer that contains an organometallic dendrimer having a core comprising a metal cation. The invention also relates to organometallic dendrimers and methods for producing the s