32results about "Methine/polymethine-azo dyes" patented technology

The present disclosure is directed to a reactive ester agent capable of conjugating a reporter molecule to a carrier molecule or solid support. The reactive ester agent has the general formula:

wherein the variables are described throughout the application.

An electrophotographic photosensitive member is formed of a support, and a photosensitive layer disposed on the support. The photosensitive layer is characterized by containing an azo pigment having an organic group represented by formula (1) below: wherein X1, Z1, k1, B, A, R1 and R2 are defined in the text. The group of the formula (1) may provide at least one of up to 4 azo-substituents of the azo pigment having an entire structure represented byAr+545 N=N-Cp) 1-4,wherein Ar denotes an aromatic or heterocyclic core unit, Cp denotes a coupler residue group, and -(N=N-Cp) denotes such an azo-substituent. The photosensitive member can exhibit good electro-photographic performances including high and stable sensitivity on repetitive use.

The invention provides a novel group of azo quencher compositions that are useful as quenchers of fluorescence and to methods for making and using them. The quenchers contain an azo bond and 1,3,3-trimethyl-2-methyleneindoline ring system. The quenchers can be derivatized to facilitate their conjugation to a variety of biologically relevant compounds, including lipids, nucleic acids, peptides, proteins, and the like.

The present invention provides an optical information recording medium comprising a substrate having provided thereon a recording layer in which information can be recorded by laser light irradiation, wherein the recording layer contains a dye represented by the following formula (I):

Formula (I)

wherein Dye represents a dye residue having an absorption as high as 10000 (cm⁻¹·mol⁻¹) or more as a molar extinction coefficient for light having a wavelength of 450 nm to 900 nm; L represents a divalent connecting group or a single bond; UV represents a dye residue having an absorption as high as 10000 (cm⁻¹·mol⁻¹) or more as a molar extinction coefficient for light having a wavelength of 280 nm to 450 nm; and m denotes an integer from 1 to 8.

The invention relates to an organic dyestuff of a recordable optical information recording medium, a preparation method thereof and a recordable optical information recording medium containing the organic dyestuff. The general formula of the organic dyestuff is as follows: ring A and ring A' are respectively aromatic ring, aromatic heterocyclic ring or aromatic condensed ring; R1, R2, R4 and R5 respectively represent same or different hydrogen or hydrocarbyl; R3 and R6 respectively represent same or different hydrocarbyl; and X represents azo metal complex anion taking a transition metal as a central atom. The invention has the following effects of absorbing visible light at the short wave length part, having excellent light resistance and solvent dissolubility, excellent thermostability, being suitable for reading for a long time without changing the information recording accuracy, and being suitable for high density recording; the Chinese blue-ray high-definition disc prepared by the dyestuff can smoothly carry out high density recording and reading. The invention also provides the preparation method of the dyestuff and the recordable optical information recording medium containing the dyestuff.

The invention relates to the molecule containing a first chromophore that exhibits a first absorption maximum above 700 nm and a second chromophore that exhibits a second absorption maximum different from the first absorption maximum, wherein the absorption of the first and second chromophores are substantially independent of each other.

The invention relates to an organic dye, in particular to a D-N=N-pi-A organic dye, wherein D refers to an electron repulsive structure unit, N=N refers to an azo structure unit, pi refers to a coumarin conjugate structure unit, and A refers to a rhodanine electron acceptor structure unit. The invention aims to find a functional organic dye which has the advantages of high molecular tailoring properties, wide spectral response range, low synthesis cost and capacity of absorbing most visible light and can be applied to the fields such as acid dyes, fluorescent dyes, organic electroluminescent materials and dye-sensitized nano TiO2 solar cells.

Dichroic dyes, dichroic dye compositions, and liquid crystal composition and liquid crystal display element containing the dichroic dyes. The dichroic dye has increased solubility and stability.

Disclosed is an imaging element comprising a bichromophoric molecule comprising a first chromophore that exhibits a first absorption maximum above 700 nm and a second chromophore that exhibits a second absorption maximum different from the first absorption maximum, wherein the absorption of the first and second chromophores are substantially independent of each other, and a process for imaging using such a donor element. Elements of the invention eliminate unwanted absorptions in the final image.

A self-dispersible metal complex colorant is represented by formula 1, which has improved storage stability, 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; T is a mono- or poly-substituted hydrophilic functional group; n is an integer between 1 and 3; and J is a linker. The self-dispersible metal complex colorant may be used in various fields employing colors, such as fibers, foods, drugs, cosmetics, coatings, inks or ceramics.

An ink jet recording method including the steps of a first recording step for applying a first ink to a recording medium and a second recording step for applying a second ink to the recording medium so as to overlap at least a region provided with the first ink, wherein the first ink is an aqueous ink containing silver particles, the second ink is an aqueous ink containing a dye, a time difference between applications of the first ink and the second ink to the recording medium is 1 sec or more to 7,200 sec or less, and the dye is a predetermined dye.

A compound for anisotropic films which in its free acid form is represented by the following formula (1). The compound for anisotropic films is useful as anisotropic films such as a polarizing film, has high dichroism in a short-wavelength region (380-500 nm), and has excellent durability. (L1 is a group represented by -(CH=CH)r- or -(C=C)s-, wherein r and s each is an integer of 1-5; Ar1 is an optionally substituted phenylene, optionally substituted naphthylene, or optionally substituted heterocyclic group; m is an integer of 0-3; p and k each is 0 or 1, provided that not both of p and k are 0; X1 is hydrogen or an organic group; and X2 is hydrogen, nitro, optionally substituted amino, or a group represented by the following formula (1-a), provided that when X2 is hydrogen, nitro, or optionally substituted amino, then m is not 0).