Zobrazeno 1 - 10
of 261
pro vyhledávání: '"Siegmar Diele"'
Autor:
Jens Kain, Xiaohong Cheng, Feng Liu, Siegmar Diele, Carsten Tschierske, Goran Ungar, Xiangbing Zeng, Marko Prehm
Publikováno v:
Journal of the American Chemical Society. 133:7872-7881
T-shaped bolaamphiphiles composed of a biphenyl rigid core, a semiperfluorinated lateral chain, two polar 1,2-diol groups in the terminal positions and flexible alkyl spacers connecting the polar groups with the biphenyl core have been synthesized an
Publikováno v:
Liquid Crystals. 37:1577-1585
The isobaric phase diagram for a binary system of liquid crystals is presented. One mixing component is a bent-core mesogen forming a B7 phase and the other one is a nematogenic calamitic compound. The occurring mesophases have been identified by the
Autor:
Siegmar Diele, Gerhard Pelzl, Ute Baumeister, Maria-Gabriela Tamba, Wolfgang Weissflog, Martin W. Schröder
Publikováno v:
Liquid Crystals. 37:839-852
Twelve new five-ring bent-core compounds have been synthesised which are derived from 2-nitroresorcinol and which contain only ester linkage groups. Their mesophase behaviour was investigated by polarising microscopy, X-ray diffraction and electro-op
Autor:
Akira Mori, Ute Baumeister, Kanji Kubo, Carsten Tschierske, Hisashi Taya, Seiji Ujiie, Tomohiko Itoh, Siegmar Diele
Publikováno v:
Liquid Crystals. 37:355-368
Mesomorphic properties of three-ring systems such as 2,5-dibenzoyloxytropones, 5-benzoylamino-2-benzoyloxytropones and 2,5-dibenzoylaminotropones with 4-alkoxy, 3,4-dialkoxy, and 3,4,5-trialkoxy groups on the benzoyl groups were investigated together
Autor:
Martin W. Schröder, Kristin Brand, Gerhard Pelzl, Siegmar Diele, Wolfgang Weissflog, Ute Baumeister
Publikováno v:
Liquid Crystals. 35:325-331
Mesophases formed by bent‐core mesogens have attracted special attention because they can organise into fluid phases with polar order and supramolecular chirality. In this paper, a new five‐ring bent‐core mesogen is presented which forms a colu
Autor:
Robert Saf, Andreas Koppitz, Stefan Kappaun, Siegmar Diele, Christian Slugovc, Anikó Vajda, Tanja Sovic, Katalin Fodor-Csorba, Karin Bartl, Franz Stelzer, Egbert Zojer, Gerhard Pelzl
Publikováno v:
Macromolecular Chemistry and Physics. 208:1458-1468
A series of liquid crystalline compounds based on 2,7-bis(biphenyl)fluorenes was synthesised by a Suzuki cross-coupling reaction and subsequent etherification with different bromoalkenes. By simple variations of the chain lengths the temperature rang
Autor:
Nils Olsson, Gunnar Andersson, Bertil Helgee, Martin W. Schröder, Lachezar Komitov, Siegmar Diele, Ingolf Dahl
Publikováno v:
J. Mater. Chem.. 17:2517-2525
A new series of dimeric chiral antiferroelectric materials using a trisiloxane as the central connecting linker and having fluorinated tails has been synthesized together with their corresponding monomers. Spacer lengths of 3–6 and 11 methylene gro
Autor:
S. Grande, Siegmar Diele, Horst Kresse, B. Das, Alexey Eremin, Gerhard Pelzl, Wolfgang Weissflog, Martin W. Schröder
Publikováno v:
The European Physical Journal E. 21:293-303
Three homologous achiral five-ring bent-core mesogens are presented where 4-chlororesorcinol is the central core and the aromatic rings are linked by ester groups. These compounds form smectic phases with a tilted arrangement of the molecules (tilt a
Publikováno v:
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 364:2657-2679
New five-ring bent-core mesogens that possess only ester connecting groups between the aromatic rings and different lateral substituents at the central phenyl ring are presented. The mesophases have been assigned by polarizing microscopy, differentia
Publikováno v:
Liquid Crystals. 33:803-809
Kojic acid was used to synthesize bent‐core mesogens. Antiferroelectric polar smectic mesophases, an oblique and a rectangular columnar mesophase were found. The mesophases were characterized by X‐ray scattering, electro‐optical measurements, p