179results about "Azomethine dyes" patented technology

A novel coordination complex formed by dinuclear metal complexation is provided. The complex is a dinuclear metal complex of a compound, wherein the compound comprises a conjugation ring system substituted with: a) an electron donating group selected from —OH, —SH and —NH2; b) an indicating group selected from a chromogenic group, a fluorescent group and an electrochemical group; and c) two binding auxiliary groups, in combination with the electron donating group each of which being coordinated with the metal to provide an anion bonding site, wherein as the complex binds to a anion, the coordination of the electron donating group with the metal is weakened and electron donation of the electron donating group to the conjugation ring system is reinforced such that the reinforced electron donation by the electron donating group is transferred through the conjugation ring system to the indicating group to produce an indicating signal concomitant with the change of its electronic density. The coordination complex shows high sensitivity and high selectivity for pyrophosphate over other anions in an aqueous solvent over a wide pH range. Therefore, the complex is useful for pyrophosphate assay as a pyrophosphate sensor.

The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight poly-carbonate.

The invention relates to compounds represented by the formula I, IIa, IIb, III, and IV and manufacturing methods thereof; wherein Ar1 stands for substituted o-arylidene or substituted o-heteroarylidene; Ar2 represents dual o-arylidene or dual o-heteroacylidene connected in various forms; Y1 represents O, S, NR20, BR20, CR15, R16, SiR15R16, S=O, or C=O; Z1 represents a straight bond, a C1-C10

The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.

The invention relates to a photopolymer formulation comprising a polyol component, a polyisocyanate component, a writing monomer, and a photoinitiator, containing a coinitiator and a dye having the formula F An, where F stands for a cationic dye and An″ stands for an anion, wherein the dye having the formula F An comprises a water absorption of =5%. The invention further relates to a holographic medium, in particular in the form of a film, containing a photopolymer formulation according to the invention, to the use of such a medium for recording holograms, and to a special dye that can be used in the photopolymer formulation according to the invention.

The present invention provides metal-containing compounds that include at least one β-diketiminate ligand, and methods of making and using the same. In certain embodiments, the metal-containing compounds include at least one β-diketiminate ligand with at least one fluorine-containing organic group as a substituent. In other certain embodiments, the metal-containing compounds include at least one β-diketiminate ligand with at least one aliphatic group as a substituent selected to have greater degrees of freedom than the corresponding substituent in the β-diketiminate ligands of certain metal-containing compounds known in the art. The compounds can be used to deposit metal-containing layers using vapor deposition methods. Vapor deposition systems including the compounds are also provided. Sources for β-diketiminate ligands are also provided.