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2 results about "Lyotropic" patented technology
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A material is called lyotropic if it forms liquid crystal phases upon the addition of a solvent. Historically the term was used to describe materials composed of amphiphilic molecules. Such molecules consist of an ionic or non-ionic hydrophilic head-group which is attracted to water, and attached to a hydrophobic group which is repelled by water. Typical hydrophobic groups are saturated or unsaturated hydrocarbon chains. Examples of amphiphilic compounds are the salts of fatty acids; phospholipids. Many simple amphiphiles are used as detergents. Lyotropic liquid crystal phases in these materials are formed by a process of self-assembly that is driven by the hydrophobic effect. Lyotropic liquid crystal phases are formed on the dissolution of amphiphilic molecules of a material in a solvent. There are several different type of lyotropic liquid crystal structures. Each of these different types has a different extent of molecular ordering within the solvent matrix.
Nonlinear optical chromophores having tetrahydrocarbazole donor groups, lyotropic compositions containing the same, and methods of poling such compositions
Nonlinear optical chromophore compositions which display lyotropic nematic liquid crystal phases in polar organic solvents and provide a mechanical anisotropic effect allowing for the formation of a non-centrosymmetric chromophore-polymer matrix without the application of an electric field.
Owner:LIGHTWAVE LOGIC INC
A strong lyotropic color change and acid-induced fluorescence-enhanced 1,3,4-oxadiazole derivative, its preparation method and application
ActiveCN119409660BOrganic chemistryMaterial analysis by observing effect on chemical indicatorProtonationGreen-light
The application belongs to the technical field of stimuli-responsive fluorescent materials, and discloses a 1,3,4-oxadiazole derivative with strong solvatochromic and acid-induced fluorescence enhancement, and a preparation method and application thereof. The intermediate product is obtained by mixing 3-dimethylaminobenzhydrazide, acyl chloride and a solvent for reaction; and the 1,3,4-oxadiazole derivative is obtained by mixing the intermediate product and phosphorus oxychloride for reaction. The molecule prepared by the application can distinguish different polar solvents and is also sensitive to protons. With the addition of TFA, the fluorescence emission peak is blue-shifted and enhanced, and the fluorescence quantum efficiency reaches 69.8% after acidification. The solid thin film can also exhibit good pH response, and the thin film is blue-shifted from yellow-green light emission to blue light emission and the fluorescence is enhanced after acid fumigation. The molecule of the application is stable after protonation, exhibits acid-induced fluorescence enhancement property, is beneficial to improve the sensitivity of pH detection, and has important roles in the fields of medical care, environmental monitoring and industrial processes.
Owner:JILIN UNIVERSITY