31results about "Anthraquinone-azo dyes" patented technology

The present invention provides a family of dark quenchers, termed Black Hole Quenchers (“BHQs”), that are efficient quenchers of excited state energy but which are themselves substantially non-fluorescent. Also provided are methods of using the BHQs, probes incorporating the BHQs and methods of using the probes.

A metal complex colorant represented by formula 1 may embody various colors and has improved fastness, such as light resistance, water resistance and the like:wherein each of A1 and A2 is independently a moiety which includes a substituted or unsubstituted C2-C30 alkenylene group having at least one double bond and is conjugated with an azo group; each of X1 and X2 is selected from the group consisting of a hydroxy group, a C1-C4 alkoxy group, a carboxyl group, and a substituted or unsubstituted amino group; M is a polyvalent transition metal; L is a neutral or anionic ligand; n is an integer from 1 to 3; and J is a linker. The metal complex colorant may be used in various fields employing colors, such as fibers, foods, drugs, cosmetics, coatings, inks or ceramics.

The present invention includes methods, articles, compositions and colorant dyes and pigments that include biocidal N-halamine dye composition having two or more heterocyclic ring structures attached to one or more N-halamine groups, wherein one or more halogens associate with the one or more one or more N-halamine groups to affect biocidal activity.

The present invention includes methods, articles, compositions and colorant dyes and pigments that include biocidal N-halamine dye composition having two or more heterocyclic ring structures attached to one or more N-halamine groups, wherein one or more halogens associate with the one or more one or more N-halamine groups to affect biocidal activity.

The present invention provides an azo pigment comprising a group represented by the general formula (1) below, an electrophotographic photosensitive member comprising an intermediate layer comprising the azo pigment, and a process cartridge and an electrophotographic apparatus that comprise the electrophotographic photosensitive member.

Dichroic dyes, compositions thereof, and liquid crystal compositions, microencapsulated liquid crystal compositions and liquid-crystal display elements employing the same. The dichroic dyes have high photostability in addition to excellent solubility. Furthermore, the liquid crystal composition employing the above dichroic dyes can have an orientational order parameter more than 0.7.

A method of preparing a complex-azo pigment having plural pigment components including at least an azo pigment represented by the following formula (a)A(H)n  (a)Pigments, both limited and unlimited by the process of making.

The invention relates to cationic direct dyes of the formula I (1), wherein m and n are independently from each other 0 or 1, D is an aromatic or a cationic heteroaromatic group, which are further specified, K is an aromatic or heteroaromatic group, E1 and E2 are independently from each other ═CH— or ═N—, An is an anion and a is a number from 1 to 6 and R1 and R2 are independently from each other and further specified. The compounds show washfastness at hair-dying.

The invention provides a method for synthesizing anthraquinone type dye or chromophore by aromatic amination of bromamine acid. The method comprises the following steps: catalyzing a condensation reaction of bromamine and arylamine in a solvent by adopting a catalyst system containing cuprous complex. According to the method, the cuprous complex is used as the catalyst system, nearly 100% conversion of the bromaine acid can be realize, no bromamine acid hydrolyzed (purple byproduct) or debrominated byproduct is generated, generation of by products is remarkably reduced, the yield of condensation products is remarkably increased, emission of acid-containing wastewater with deep chromaticity is reduced; and copper powder is not used, the usage of catalyst can be reduced, the content of heavy metals in the condensation products can be reduced, the content of heavy metals in wastewater can be reduced, environmental pollution can be reduced, and production cost can be reduced.

The present disclosure provides a quenching dye with an anthraquinone structure, which has a broad and high absorption spectrum in the visible and near-infrared wavelength regions and exhibits high stability and superior solubility in aqueous conditions. A quenching dye composition containing the anthraquinone compound according to the present disclosure as an active ingredient can be widely used in the field of optical molecular imaging to observe the movement of a biomolecule because it can easily label a biomolecule manipulated in an aqueous buffer.