Conducting liquid crystals
AssigneeBritish Technology Group Limited
InventorsNeville Boden, Richard J. Bushby, Jonathan Clements, Peter F. Knowles, Malini V. Jesudason
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Abstract
A semi-conducting liquid crystalline material exhibiting anisotropic conduction properties. The material comprises a radical salt of a disc-like mesogen and a dopant which is an oxidizing or a reducing agent. Not more than 0.5 moles of dopant per mole of mesogen are present.
Claims15
A semi-conducting liquid crystalline material exhibiting anisotropic conducting properties, comprising a radical salt of a disc-like mesogen and a dopant which is one only of an oxidizing or a reducing agent, wherein not more than 0.5 moles of dopant per mole of mesogen are present, said dopant being selected from the group consisting of aluminum trichloride, aluminum tribromide, iodine and antimony pentafluoride.
A semi-conducting liquid crystalline material exhibiting anisotropic electronic conduction properties, comprising a radical salt of a mesogen and a dopant which is one only of an oxidizing or a reducing agent, wherein not more than 0.5 moles of dopant per mole of mesogen are present, said mesogen comprising a polyaromatic moiety the formula:
- ##STR5## wherein X is a C.sub.1-4 -alkyl or alkoxy group, said dopant being selected from the group consisting of aluminum trichloride, aluminum tribromide, iodine and antimony pentafluoride.
A process for the production of a semi-conducting liquid crystalline material exhibiting anisotropic conduction properties, which process comprises the steps of:
- mixing a disc-like mesogen and a dopant which is an oxidizing or a reducing agent, and
- heating the mixture in the absence of oxygen,
- wherein not more than 0.5 moles of dopant per mole of mesogen are present.
Dependencies are inferred from the claim text.