PatentDOI
Cyclosiloxanes with mesogenic side groups
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TLDR
In this paper, a cyclic siloxane containing at least one silicon atom bonded to a group of the formula (COO-, OOC-, -OOC-, CH 2 -CH 2 2 -, -CH = CH, -C = C-, N = N-, -N = N (O) -, CH = N, N = CH- or -Si (R) 2 -.Abstract:
Die vorliegende Erfindung betrifft cyclische Siloxane, welche mindestens eine an ein Siliciumatom gebundene Gruppe der Formel (1) enthalten The present invention relates to cyclic siloxanes, containing at least one silicon atom bonded to a group of the formula (1) worin x eine ganze Zahl im Wert von mindestens 2, vorzugsweise von 2 bis 10, wherein x is an integer having a value of at least 2, preferably from 2 to 10, R" eine chemische Bindung oder einen zweiwertigen Rest der Formel -COO-, -OOC-, -CH 2 -CH 2 -, -CH = CH-, -C=C-, -N = N-, -N = N(O)-, -CH = N-, -N = CH- oder -Si(R) 2 -, wobei die Reste R "is a chemical bond or a divalent radical of the formula -COO-, -OOC-, -CH 2 -CH 2 -, -CH = CH-, -C = C-, -N = N-, -N = N ( O) -, -CH = N-, -N = CH- or -Si (R) 2 -, where the radicals R gleiche oder verschiedene, gegebenenfalls substituierte Kohlenwasserstoffreste mit 1 bis 18 Kohlenstoffatomen sind, R are identical or different, optionally substituted hydrocarbon radicals having 1 to 18 carbon atoms, L jeweils gleiche oder verschiedenen, gegebenenfalls durch mindestens einen Rest Q in 2-, 3-, 5- und/oder 6-Stellung substituierten 1,4-Phenylen- oder 1,4-Cyclohexylenreste, L are identical or different, optionally substituted by at least one radical Q in the 2-, 3-, 5- and / or 6-position substituted 1,4-phenylene or 1,4-cyclohexylene, Q gleiche oder verschiedene Reste, namlich Wasserstoff-, Fluor- oder Chloratome, Cyano-, Methyl- oder Trifluormethylgruppen, Q identical or different radicals, namely hydrogen, fluorine or chlorine atoms, cyano, methyl or trifluoromethyl, A gleiche oder verschiedene zweiwertige Reste der Bedeutung R" oder der Formel -CH 2 -O- oder -O-CH 2 -, -CH 2 -CH 2 -, -N = N-, - N = N(O)-, -CH = N- oder -N = CH-, A identical or different divalent radicals having the meaning R "or of the formula -CH 2 -O- or -O-CH 2 -, -CH 2 -CH 2 -, -N = N-, - N = N (O) -, -CH = N- or -N = CH-, y eine ganze Zahl im Wert von 0 bis 10, vorzugsweise von 0 bis 2, y is an integer having a value from 0 to 10, preferably from 0 to 2 z eine ganze Zahl im Wert von 0 bis 10, vorzugsweise von 0 bis 2, z is an integer having a value from 0 to 10, preferably from 0 to 2 mit der Masgabe, das die Summe y + mindestens 1 betragt, und with the proviso that the sum of y + is at least 1, and T die in der Beschreibung angegebene Bedeutung hat. T has the meaning given in the description.read more
Citations
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Journal ArticleDOI
Non-conventional liquid crystals—the importance of micro-segregation for self-organisation
TL;DR: The concept of amphiphilicity as discussed by the authors describes any chemical or structural contrast within a molecule, such as hydrophilic/lipophilic, polar/non-polar, hydrocarbon/fluorocarbon, oligosiloxane/hydrocarbon or rigid/flexible.
Journal ArticleDOI
Angle-dependent optical effects deriving from submicron structures of films and pigments
Gerhard Dr. Pfaff,Peter Reynders +1 more
Journal ArticleDOI
Long-range structuring of nanoparticles by mimicry of a cholesteric liquid crystal
TL;DR: This work demonstrates the long-range ordering of nanoparticle assemblies that adopt the helical configuration of the cholesteric liquid crystalline phase and demonstrates how such an assembly process could be modulated, providing a versatile route to new materials systems.
Journal ArticleDOI
Metal-containing liquid-crystal phases
TL;DR: In this article, the synthesis, structures and properties of ionic, coordination, organometallic and organoelement compounds with liquid-crystal properties are surveyed and their potential applications are described.
Journal ArticleDOI
Synthesis and Characterization of Liquid Crystalline Silsesquioxanes
TL;DR: In this article, mesogenic groups were added to cubic silsesquioxane cores (LC cubes) via hydrosilylation of allyloxy functionalized mesogens (4, 5, 8, and 9) with octakis(dimethylsiloxy) octasilsesquioxanes (Q8M8H).
References
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Journal ArticleDOI
The Addition of Silicon Hydrides to Olefinic Double Bonds. Part II. The Use of Group VIII Metal Catalysts
Patent
Smectic liquid crystals
TL;DR: The use of a certain class of liquid crystal materials that exhibit a smectic C phase allows the production of a bistable liquid crystal display element as discussed by the authors, which promotes the use of matrix addressing for liquid crystal based elements in a display.