30 results about "Cryptand" patented technology

One embodiment of the invention comprises an ion exchange composition formed by reacting unsaturated carbon to carbon moieties pendant from derivatized ion binding cryptands with a support substrate under free radical activation conditions to form a covalent bond therebetween. In another embodiment, a cryptand ion exchange composition is made by covalently bonding unsaturated carbon to carbon moieties pendant from a derivatized ion binding cryptands with unsaturated carbon to carbon moieties pendant from a support substrate under free radical activation conditions to form covalent bond.

A composition for removing mercaptan from a gas stream containing at least one acid gas in addition to a mercaptan, the composition comprising a physical and / or chemical solvent for H2S and an inclusion compound for the mercaptan. A process of treating gas stream using the composition. The inclusion compound is selected from the group consisting of, cyclodextrin, cryptand, calixarene, cucurbituril. The chemical solvent may be monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA, diisopropylamine (DIPA), diglycolamine (DGA) and methyldiethanolamine (MDEA). Examples of useful physical solvents include cyclotetramethylene sulfone (sulfolane) and its derivatives, aliphatic acid amides, NMP (n-methylpyrrolidone), N-alkylated pyrrolidones and corresponding piperidone, methanol and mixtures of dialkethers of polyethylene glycols. The method comprises scrubbing preferably the natural gas with an aqueous solution comprising the above compounds followed by a stripping regeneration step.

An ink-jet recording liquid composition which is used together with a colored ink to form images and is capable of causing reaction upon contact with the colored ink; the composition being characterized by containing at least (a) a polyvalent metal salt, (b) a substance selected from cryptands and (c) a liquid medium; or an ink-jet recording ink characterized by containing at least (a) a polyvalent metal salt, (b) a substance selected from cryptands, (c) a liquid medium and (d) a coloring material.

The present invention discloses the enzymatic measurement reagents and process of potassium ion in serum. Crown ether is used in the present invention that has the characteristics of cryptand ether and is capable of complexing with potassium ion. Different matches of reagents are tested to find out the proper concentration. The present invention has similar result with the cryptand ether method in the aspects of sensitivity, accuracy and precision, but it is much simpler and decreases the cost significantly.

The invention discloses a process method for preparing cryptand 222. The process method comprises the following steps: 1, taking tris[(2-ethylnenoxy)ethyl]amine as a raw material, and reacting to obtain an intermediate under catalytic actions of a Grubbs catalyst and alkali metal salts; and 2, adding a hydrogen source into the intermediate obtained in the step 1 under the catalytic action of a hydrogenation catalyst, and reacting, thereby obtaining the cryptand 222. The process method disclosed by the invention has the beneficial effects of short synthesis period and high yield.

A photochemical hole burning medium is composed of a material in which a rare earth complex and a reducing agent is dispersed in a solid matrix. The rare earth complex may be at least one complex selected from the group consisting of a europium (III) crown ether complex, a europium (III) polyether complex, and a europium (III) cryptand complex.

The invention relates to homo and heterometallic soluble coordination polymers containing an oxalate ligand and to a method for obtaining spinels from same. The homo and heterometallic coordination polymers, which contain at least one oxalate ligand, are characterised in that they also contain at least one organic molecule capable of stabilising expanded metal complex structures through the formation of supramolecular interactions such that the polymer is substantially soluble in water and insoluble in organic solvents. Said polymers, when in the solid state, can generate spinel-type metal oxides or other mixed oxides following a thermal oxidation treatment including steps comprising: the preparation of an alcoholic solution of a metal complex containing at least one oxalate ligand and a metal salt, the precipitation of the metal complex and the metal salt with a cryptand-type molecule through the formation of a coordination polymer that is soluble in water and insoluble in organic solvents, the separation of the precipitate obtained in the previous step, and the heating of same in an oxidant atmosphere to a temperature of at least 350 DEG C until the spinel or mixed oxide has formed.

The invention discloses a reagent and a method for the enzymatic determination of sodium ions in serum. The invention adopts crown ether, which has the characteristics of complexing between cryptate and sodium ions, and uses the ratio of different reagents to find a better concentration. In terms of sensitivity, accuracy, In terms of precision, it has the same effect as using cryptane. The measuring effect of the present invention is similar to that of cryptane, but the measuring method is simple and the cost is greatly reduced.

A cryptand-ionic liquid supported method for the first totally chemical synthesis of lasso peptide BI-32169 and its analogs is described. Cryptand-ionic liquid supported technique has been proved to be a powerful and controllable synthetic tool for producing or modifying chemically engineered lasso-shaped peptides and studying structure-activity relationships of lasso peptides as well. Thus, it is highly desirable that this synthetic strategy with designable multi-linker support could benefit the expansion of diverse lasso peptide libraries for discovery of novel bioactive peptides.

Novel fluorophores for fluorescent ion indicators incorporate water-solubilizing functional groups. These fluorophores enable visible-wavelength analysis of ion concentrations with chelators that are insoluble or poorly soluble in water. A green version of the fluorophore comprises a putative fluorescein with carboxylate appendages. An orange version of the fluorophore comprises a putative rhodamine, also with carboxylate appendages. Attaching the fluorophore to a 12-crown-4, a 15-crown-5, a 18-crown-6, a 21-crown-7, or a 24-crown-8 produces lithium, sodium, potassium, rubidium, and cesium indicator families, respectively. Attaching the fluorophore to diaza [1,1,1], [1,1,2], [1,2,2], [2,2,2], [2,2,3], [2,3,3], or [3,3,3] cryptands produces more selective lithium, sodium, potassium, rubidium, and cesium indicator families, respectively. Attaching the fluorophore to BAPTA, APTRA, or half- BAPTA or their analogs produces new calcium, magnesium, and other metal ions indicator families that strongly resist leakage from the cell.