By Carsten Tschierske (auth.), Carsten Tschierske (eds.)
Fluorinated Liquid Crystals: layout of soppy Nanostructures and elevated Complexity of Self-Assembly via Perfluorinated Segments, by means of Carsten Tschierske Liquid Crystalline Crown Ethers, via Martin Kaller and Sabine Laschat Star-Shaped Mesogens – Hekates: the main simple superstar constitution with 3 Branches, through Matthias Lehmann DNA-Based gentle stages, by way of Tommaso Bellini, Roberto Cerbino and Giuliano Zanchetta Polar and Apolar Columnar levels made from Bent-Core Mesogens, by way of N. Vaupotič, D. Pociecha and E. Gorecka Spontaneous Achiral Symmetry Breaking in Liquid Crystalline levels, by means of H. Takezoe Nanoparticles in Liquid Crystals and Liquid Crystalline Nanoparticles, via Oana Stamatoiu, Javad Mirzaei, Xiang Feng and Torsten Hegmann Stimuli-Responsive Photoluminescent Liquid Crystals, by means of Shogo Yamane, Kana Tanabe, Yoshimitsu Sagara and Takashi Kato
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Additional info for Liquid Crystals: Materials Design and Self-assembly
It seems that there is a significant effect of molecular shape and topology, stabilizing SmA phases in the system 41/43 and Colhex phases in the system 35/37. In addition, the mesophase stability is often reduced close to the transition to another mesophase (see Fig. 15). Hence, the order–disorder temperatures can only be roughly estimated based on segmental solubility parameters [24, 25]. Dendritic molecules, forming predominately hexagonal columnar and micellar cubic phases, have been introduced and intensively investigated by Percec et al.
Tschierske End-branching of the RF-chain has apparently no strong effect on the LC phase stability as shown in the examples of compounds 106a,b with the same length as the (semi)fluorinated chain in Fig. 29 [177, 196] and for compounds 109b/111 with the same number of fluorinated carbons atoms as in the chain (Fig. 30) [198a]. This is surprising, considering the significant size of the perfluoroisopropyl group, but in line with the idea that nano-scale segregation instead of the rod-like shape of the RF-chains provides a major contribution to mesophase stabilization.
11a, is assumed . 3 were also reported for 4-substituted methyl benzoates like compound 21 (Fig. 10) . Detailed XRD studies of this compound confirmed a phase structure with layers of completely overlapping RF-chains  and separate layers of the aromatics (see Fig. 11a). The same study has shown that the organization completely changes for the corresponding benzoic acid 23 (Fig. 10 In this case there is no interdigitation of the RF-chains and a (tilted) double layer structure is formed (see Fig.