Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Horst Zaschke"'
Autor:
Horst Zaschke, Reinhard Stolle
Publikováno v:
Zeitschrift für Chemie. 15:441-443
Autor:
Frank Giesselmann, J. Schacht, Peter Zugenmaier, Horst Zaschke, Ingo Dierking, Wojciech Kuczynski, K. Mohr
Publikováno v:
Liquid Crystals. 19:151-157
The mesomorphic properties of the N∗, S∗c and higher ordered smectic phases have been investigated for a homologous series of 4-[(S)-2-chlor-3-methylbutanoyloxy]-4′-(4-n-alkyloxy-benzoyloxy)biphenyls. They have been characterized by optical tex
Publikováno v:
Liquid Crystals. 18:443-449
The synthesis and characterization of a new diastereomeric compound are reported; this exhibits a temperature induced inversion of the cholesteric twist. Measurements of the cholesteric pitch and handedness are presented and qualitatively discussed i
Autor:
Peter Zugenmaier, Ingo Dierking, Frank Gießelmann, Wojciech Kuczynski, Kristina Mohr, Horst Zaschke
Publikováno v:
Zeitschrift für Naturforschung A. 49:1081-1086
The cholesteric twist inversion by temperature variation o f a single component thermotropic liquid crystalline system was experimentally investigated and is explained by the partial twisting power model, evaluating the temperature dependent pitch o
Publikováno v:
Journal f�r Praktische Chemie/Chemiker-Zeitung. 335:549-554
Synthesis and Ferroelectric Properties of a Homologous Series of Chiral Esters of 2,5-Diphenylpyrimidines A new homologous series of (S)-2-(4-n-alkyloxyphenyl)-5-{4-(2-chloro-3-methylpropanoyloxy)-phenyl}-pyrimidines has been synthesized. Polymorphy,
Publikováno v:
ChemInform. 26
Publikováno v:
Liquid Crystals. 11:145-150
We have prepared new esters of 6-alkyloxypyridazine-3-carboxylic acid and the 6-alkyloxypyridine-3-carboxylic acid. The introduction of the heteroaromatic rings leads to significant changes in mesomorphic behaviour. The compounds exhibit a strong ten
Publikováno v:
Molecular Crystals and Liquid Crystals. 208:9-19
X-ray and miscibility studies of the smectic phases of several 2,5-diphenylpyrimidine esters are presented. These investigations lead to the establishment of a new type of tilted smectic phase with a short range positional order within the smectic la
Autor:
Frank Kuschel, D. Girdziunaite, A. Lunow, A. Mädicke, Horst Zaschke, Detlev Joachimi, G. Brezesinski, Carsten Tschierske, Frank Hentrich
Publikováno v:
Liquid Crystals. 9:821-829
Novel amphiphilic propane-1,2-diol derivatives incorporating a wide variety of calamitic structural units, like biphenyl, dicyclohexyl. phenylbemzoate, phenyl pyrimidine and phenylthiadiazole, were synthesized and their mesomorphic behaviour studied.
Publikováno v:
Liquid Crystals. 9:571-582
Novel 3-phenyloxy substituted propane-1,2-diol derivatives, 4-(4-n-hexyloxyphenyl)-butane-1,2-diol and 4-(trans-4-n-pyropylcyclohexyl)-butane-1,2-diol have been synthesized and their thermal behaviour has been studied. These compounds exhibit thermot