Get Liquid Crystals: Materials Design and Self-assembly PDF

By Carsten Tschierske (auth.), Carsten Tschierske (eds.)

ISBN-10: 3642275907

ISBN-13: 9783642275906

Fluorinated Liquid Crystals: layout of soppy Nanostructures and elevated Complexity of Self-Assembly through Perfluorinated Segments, by way of Carsten Tschierske Liquid Crystalline Crown Ethers, by way of Martin Kaller and Sabine Laschat Star-Shaped Mesogens – Hekates: the main uncomplicated celebrity constitution with 3 Branches, by means of Matthias Lehmann DNA-Based gentle levels, by means of Tommaso Bellini, Roberto Cerbino and Giuliano Zanchetta Polar and Apolar Columnar stages made from Bent-Core Mesogens, by means of N. Vaupotič, D. Pociecha and E. Gorecka Spontaneous Achiral Symmetry Breaking in Liquid Crystalline stages, by way of H. Takezoe Nanoparticles in Liquid Crystals and Liquid Crystalline Nanoparticles, by means of Oana Stamatoiu, Javad Mirzaei, Xiang Feng and Torsten Hegmann Stimuli-Responsive Photoluminescent Liquid Crystals, through Shogo Yamane, Kana Tanabe, Yoshimitsu Sagara and Takashi Kato

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Additional info for Liquid Crystals: Materials Design and Self-assembly

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12 Selected examples of taper shaped crown ethers and polyethers with three fluorinated chains (T/ C); data refer to compounds 30, 32 and 34 [132–135] compounds (Fig. 15b). This indicates that in mixed systems the effect of the individual molecules is averaged and the “mean field” of the system as a whole determines the morphology of the self-assembled superstructure. Whereas the mesophase morphologies of compounds 35–37 depend on the size ratio of polar and apolar segments, the mesophase stabilities are mainly influenced Fluorinated Liquid Crystals: Design of Soft Nanostructures 27 Fig.

Whereas the hydrogen bonded complexes 124a,b and 125 with linear RF-chains have very high melting temperatures [246], much lower melting points were obtained with the complexes 126–131 comprising branched RF-chains (Fig. 34) [166]. It is clear that the bis(perfluoropropylene oxide) chains are the most bulky RF-groups in this series of compounds which leads to a bicontinuous cubic phase with Ia3d symmetry and a columnar phase for the bipyridine complex 130. However, the benzoic acid dimers 126 and 128, having the same bulky RF-groups as 130, do not form cubic and columnar phases.

7 observed for these benzoic acids. Related types of LC structures have been discussed for other partly fluorinated 4-alkoxybenzoic acids [126], and succinimidyl benzoates 24 [121]. In Fig. 10 the effect of increasing polarity of the substituent at the aromatic ring is shown, also including strongly polar hydrogen bonding groups, such as hydrazides (25) [122], diols (26) [125] and carbohydrates (27, 28) [123, 124]. The strong stabilization of the LC phases from 25 to 27 is due to the increasing CED as the number of hydrogen bonding between the polar groups grows.

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Liquid Crystals: Materials Design and Self-assembly by Carsten Tschierske (auth.), Carsten Tschierske (eds.)


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