Abstract:
The present invention is related to compounds for use in liquid crystal media, liquid crystal media comprising said compounds, the use of said media in electro-optical devices, said electro-optical devices, and the use of said compounds in mesogenic media for use in electro-optical devices that may be operated in an optically isotropic state.
Abstract:
Die Erfindung betrifft ein flüssigkristallines Medium auf der Basis eines Gemisches von polaren Verbindungen mit positiver dielektrischer Anisotropie, dadurch gekennzeichnet, dass es eine oder mehrere Verbindungen der Formel (I) und eine oder mehrere Verbindungen der Formel (IA), worin R 1 , R 2 , Ring A, Ring B, L 1-4 , Z 1-4 , Z 1 , Z 2 , X 1 , X 2 und a die in Anspruch (1) angegebenen Bedeutungen besitzen, enthält, wobei der Anteil der Verbindungen der Formel (I) im Medium mindestens 18 Gew.& beträgt.
Abstract:
Die Erfindung betrifft ein photostabiles flüssigkristallines Medium umfassend - wenigstens eine Verbindung der Formel I und - wenigstens eine Verbindung der Formel II sowie dessen Verwendung für elektrooptische Zwecke und dieses Medium enthaltende Anzeigen.
Abstract:
Die Erfindung betrifft flüssigkristalline Verbindungen der Formel (I), worin X 1 , X 2 , X 3 , Z 1 , Z 2 , L 1 , L 2 , L 3 , L 4 , L 5 , L 6 , L 7 , L 8 , L 9 , L 10 , L 11 und a die in Anspruch 1 angegebenen Bedeutungen haben, sowie flüssigkristalline Medien enthaltend mindestens eine Verbindung der Formel (I) und elektrooptische Anzeigen enthaltend ein solches flüssigkristallines Medium.
Abstract:
Die Erfindung betrifft CF 2 O-verbrückte, axial substituierte Cyclohexan-Derivate, insbesondere Verbindungen der Formel (I), in der die Gruppe (a) bedeutet, W 1 , W 2 unabhängig voneinander -CH 2 - und/oder -0- bedeuten, X 1 , X 2 , X 3 , X 4 unabhängig voneinander H, F, -CH 3 -CH 2 F-CH 2 F und/oder -CF 3 bedeuten, mit der Maßgabe, dass mindestens ein Substituent X 1 , X 2 , X 3 und/oder X 4 nicht H bedeutet, Z 2 eine Einfachbindung, -CH 2 -CH 2 - oder -CF 2 -CF 2 - bedeutet, m 0 oder 1 ist und R 1 , R 2 , A 1 , A 2 , A 3 , Z 1 , Z 3 , k1 und k3 die angegebene Bedeutung haben. Ferner betrifft die Erfindung flüssigkristalline Medien sowie optische und elektrooptische Anzeigeelemente.
Abstract:
The invention relates to chiral compounds of formula I wherein X 1 ,X 2 ,X 1 ,X 2 ,x 1 ,x 2 ,y 1 ,y 2 ,B,C,U 1 ,U 2 ,V 1 ,V 2 ,W 1 and W 2 have the meaning given in claim 1, to liquid crystal mixtures comprising at least one chiral compound of formula I, to chiral linear or crosslinked liquid crystal polymers obtainable by polymerizing a polymerizade mixture comprising at least one chiral compound of formula I, to the use of chiral compound of formula I and mixtures and polymers obtained thereof in liquid crystal display, active and passive optical elements, adhesives, synthetic resins with anisotropic mechanical properties, cosmetic and pharmaceutical compositions, diagnostics, liquid crystal pigments, for decorative and security applications, nonlinear optics, optical information storage or as chiral dopants, and to a liquid crystal display comprising a mixture comprising at least one chiralcompound of formula I.
Abstract:
An electronic element (10) comprising a plurality of cells (100) arranged in a three dimensional array of cells (100) is provided, wherein the cells (100) are located at crossings between two crossed electrode lines (30, 31). Each cell (100) of the electronic component (100) comprises in this order a first electrode (102), a part (104) of a molecular layer (20) and a second electrode (106), wherein the molecular layer (20) is a self-assembled monolayer of organic molecules having an anchoring group connected to a dipolar unit by means of a conformationally flexible unit. Further aspects of the invention relate to a method and a compound for producing such an electronic element (10) and the use of such an electronic element (10).
Abstract:
A two-bit memory device (1) having a layer structure (10) is proposed. The layer structure (10) comprises in this order a bottom layer (A), a molecular layer (C) comprising a chiral compound having at least one polar functional group, and a top layer (E). The top layer (E) is electrically conductive and ferromagnetic. The chiral compound of the molecular layer (C) acts as a spin filter for electrons passing through the molecular layer (C). The chiral compound is of flexible conformation and has a conformation-flexible molecular dipole moment. An electrical resistance of the layer structure (10) for an electrical current running from the bottom layer (A) to the top layer (E) has at least four distinct states which depend on the magnetization of the top layer (E) and on the orientation of the conformation-flexible dipole moment of the chiral compound of the molecular layer (C). Further aspects of the invention relate to a method for operating the two-bit memory device and an electronic component comprising at least one two- bit memory device.
Abstract:
The present invention relates to azo dye of formula I defined in claim 1, to a liquid crystalline medium comprising said azo dye, the use of said medium for optical, electrooptical and electronic purposes, in particular in devices for regulating the passage of energy from an outside space into an inside space, for example in windows. The invention further relates to a device containing the liquid crystalline medium according to the invention.