1987results about "Azo dyes" patented technology

An organic electroluminescent element comprising a light emission layer and a hole blocking layer adjacent to the light emission layer, wherein, (i) the light emission layer contains a compound having a specified partial structure and having a molecular weight of not more than 1700; and (ii) the hole blocking layer contains a derivative selected from the group consisting of a styryl derivative, a boron derivative and a carboline derivative.

A process for preparing a compound having the formula L2IrL′ is provided. The process comprises: combining and L′ in the presence of an organic solvent to form a mixture, wherein L is a suitable carbene ligand precursor coordinated to Ir; and L′ is a bidentate ligand or two monodentate ligands, and L is different from L′; Also provided is a process for preparing a compound having the formula The process comprises: (a) combining L, a carbene ligand precursor, with an organic solvent; (b) maintaining the mixture of step (a) at a temperature from about 175° C. to less than the boiling point of the organic solvent in (a). A process for preparing a compound with the formula L3Ir is also provided. This process comprises combining and L in the presence of alcohol and a base to form a mixture, wherein L is a bidentate ligand that may form a five-membered chelate ring.

Various embodiments disclosed herein relate to optical elements comprising an at least partial coating having a first state and a second state connected to at least a portion of a substrate, the at least partial coating being adapted to switch from the first state to the second state in response to at least actinic radiation, to revert back to the first state in response to thermal energy, and to linearly polarize at least transmitted radiation in at least one of the first state and the second state. Other embodiments relate to optical elements comprising a substrate and at least one at least partially aligned photochromic-dichroic compound connected to at least a portion of the substrate and having an average absorption ratio greater than 2.3 in the activated state as determined according to CELL METHOD. Still other embodiments relate to security devices, liquid crystal cells and methods of making the same.

The invention relates to a novel electrophoretic dispersion comprising a fluorinated solvent as the continuous phase, charged pigment particles or pigment containing microcapsules as the dispersed phase, and the charge of the pigment particles is provided by a charge controlling agent comprising:(i) a soluble fluorinated electron accepting or proton donating compound or polymer in the continuous phase and an electron donating or proton accepting compound or polymer in the dispersed phase; or(ii) a soluble fluorinated electron donating or proton accepting compound or polymer in the continuous phase and an electron accepting or proton donating compound or polymer in the dispersed phase.

Various non-limiting embodiments disclosed herein relate generally to photochromic compounds, which may be thermally reversible or non-thermally reversible, and articles made therefrom. Other non-limiting embodiments relate to photochromic-dichroic compounds, which may be thermally reversible or non-thermally reversible, and articles made therefrom. For example, one non-limiting embodiment provides a thermally reversible, photochromic compound adapted to have at least a first state and a second state, wherein the thermally reversible, photochromic compound has an average absorption ratio greater than 2.3 in at least one state as determined according to CELL METHOD. Another non-limiting embodiment provides a photochromic compound comprising: (a) at least one photochromic group chosen from a pyran, an oxazine, and a fulgide; and (b) at least one lengthening agent L attached to the at least one photochromic group and represented by the formula —[S1]c-[Q1-[S2]d]d′-[Q2-[S3]e]e′-[Q3-[S4]f]f′—S5—P, which is described herein.

The invention provides for dendrimer conjugates useful for liver-specific delivery of therapeutic agents. The therapeutic agent is associated to the dendrimer through a enzyme-cleavable covalent linkage.

An electroluminescent device containing an anode, an organic electroluminescent element, and a cathode wherein the electroluminescent element contains, for example, a fluorescent hydrocarbon component of Formula (I) wherein R1 and R2 are substituents, which are selected from the group consisting of hydrogen, an alkyl, an alicyclic alkyl, an alkoxy, a halogen, and a cyano; Ar1 and Ar2 are each independently an aromatic component or an aryl group comprised of a from about 4 to about 15 conjugate-bonded or fused benzene rings.

Provided is an organic electroluminescent device that exhibits an efficient host-dopant energy transfer mechanism, and thus, expresses a certain high-efficiency electroluminescent performance, based on improved electron density distribution. The organic electroluminescent device also overcomes low initial efficiency and short operation life property, and secures high-performance electroluminescent performance with high efficiency and long life property for each color.

Fluorescence-emitting material which improves luminous efficiency of an organic light-emitting element such as an organic EL element or an organic PL element and an organic light-emitting element using the fluorescence-emitting material. The fluorescence-emitting material includes a compound having an indolocarbazole skeleton represented by the following general formula (1), as defined in the specification.The organic light-emitting element includes an organic EL element including: a substrate; an anode; a cathode; and a light-emitting layer, the anode and the cathode being laminated on the substrate and the light-emitting layer being sandwiched between the anode and the cathode, in which the light-emitting layer includes: the organic light-emitting material; and as a host material, an organic compound having excited triplet energy higher than that of the organic light-emitting material.

Fluorescence-emitting material which improves luminous efficiency of an organic light-emitting element such as an organic EL element or an organic PL element and an organic light-emitting element using the fluorescence-emitting material. The fluorescence-emitting material includes a compound having an indolocarbazole skeleton represented by the following general formula (1), as defined in the specification.The organic light-emitting element includes an organic EL element including: a substrate; an anode; a cathode; and a light-emitting layer, the anode and the cathode being laminated on the substrate and the light-emitting layer being sandwiched between the anode and the cathode, in which the light-emitting layer includes: the organic light-emitting material; and as a host material, an organic compound having excited triplet energy higher than that of the organic light-emitting material.

The present invention relates to a photopolymer formulation containing chemically crosslinked matrix polymers, writing monomers and a photoinitiator system, wherein the photoinitiator system contains a HABI, a dye attuned to the HABI and having an absorption maximum in the range of 400-800 nm and a hydrogen donor. The present invention further relates to a process for producing exposed holographic media with the above photopolymer formulation.

The present invention addresses the problem of providing a novel polycyclic aromatic compound and an organic electroluminescent element using the same. The above problem is solved by providing a novel polycyclic aromatic compound in which a plurality of aromatic rings are connected by boron atoms, oxygen atoms, or the like, thereby increasing the number of options for organic EL element materials, and also solved by providing a superior organic EL element using said novel polycyclic aromatic compound as an organic EL element material.

Described herein are methods, compositions and articles of manufacture involving neutral conjugated polymers including methods for synthesis of neutral conjugated water-soluble polymers with linkers along the polymer main chain structure and terminal end capping units. Such polymers may serve in the fabrication of novel optoelectronic devices and in the development of highly efficient biosensors. The invention further relates to the application of these polymers in assay methods.

The invention relates to a thermal activation delayed fluorescent material with a general formula of the structure shown as the formula (I) or the formula (II). D is one of phenoxazinyl, phenothizainyl, 9,9-dimethyl acridine, 9-methyl phenazinyl, 9-phenyl phenazinyl, 4-phenoxazinyl-1-phenyl, 4-phenothizainyl-1-phenyl, 4-(9,9-dimethyl)acridinyl-1-phenyl, 4-(9-methyl)-phenazinyl-1-phenyl, 4-(9-phenyl)phenazinyl-1-phenyl and 3,5-bis-carbazolyl-1-phenyl. The invention further relates to an organic electroluminescent device which comprises a light-emitting layer, and luminescent dye of the light-emitting layer is the thermal activation delayed fluorescent material. The singlet state-triplet state energy gap (delta EST) of the thermal activation delayed fluorescent material is very small, triplet state excitors can be converted into singlet state excitors through inverse intersystem crossing (RIST) to emit light, and the efficiency and stability of an OLED device can be improved. The formula is shown in the description.

The objective of the invention is to provide an highly efficient polarizer providing an improved brightness and color saturation of a LCI element based on such polarizer.This objective is to be attained by using, in manufacture of a polarizer and a LCI element based on such polarizer, at least one birefringent anisotropically absorbing layer having at least one refraction index that grows as the polarized light wavelength increases, i.e. having the abnormal dispersion.The use of said layer allows to create polarizers of both the dichroic and interference types. Further, the use of said layer allows to create a polarizer that provides, in a relatively simple design, conversion of practically all energy of a non-polarized radiation into the polarized radiation.The above-recited peculiarities of the claimed polarizer based on a birefringent anisotropically absorbing layer having the abnormal dispersion allow to create both a color and monochromic LCI element distinguished for an higher brightness, color saturation, good angular characteristics and absence of shadows.

There are described novel rhodamine dye compounds and imaging members and imaging methods, including thermal imaging members and imaging methods, utilizing the compounds. The dye compounds exhibit a first color when in the crystalline form and a second color, different from the first color, when in the liquid, amorphous form.

Co-topo-polymeric indicator compositions and methods for making and using the same are provided. Indicator compositions of the invention include a polymer and undergo a color change, which may be reversible or irreversible, in response to an applied stimulus, e.g., temperature. Aspects of methods of producing the compositions include setting a fluid co-topo-polymeric precursor composition into a solid product and then subjecting the solid product (either immediately or after a delay period) to polymerizing conditions to produce the desired indicator composition. Also provided are indicator devices that include the indicator compositions of the invention. The compositions of the invention find use in a variety of different applications.

Dye labeled imidazonaphthyridine, imidazopyridine and imidazoquinoline compounds having immune response modulating activity are disclosed. The compounds arc useful, inter alia, for determining the binding and / or receptor sites of the molecules.

Provided are a novel anthracene derivative of a specific structure in which benzofuran or benzothiophene is bonded to anthracene through an arylene group, a material for an organic electroluminescence device and a light emitting material for an organic electroluminescence device each containing the anthracene derivative, and an organic electroluminescence device including an organic thin film layer formed of one or plural layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the anthracene derivative alone or as a component of a mixture. The organic electroluminescence device has high luminous efficiency and is capable of emitting light with a long lifetime, and the device can be realized by the anthracene derivative.

The present invention describes indenocarbazole derivatives having electron and hole transport properties, especially for use in the emission layer and / or charge transport layer of electroluminescent devices or as matrix material. The invention further provides a process for preparing the compounds of the invention, and electronic devices comprising them.

Aqueous, colloidal gas black suspension containing:(a) a gas black, (b) an azo compound of the formula 1(c) and water. The aqueous, colloidal gas black suspension is produced by dispersing the gas black and the azo compound of the formula 1 in water. It can be used in the production of inks, ink-jet inks, surface coatings and colored printing inks.

Provided are photochromic articles including a substrate, a primer layer that includes a first photochromic compound, and a photochromic-dichroic layer over the primer layer that includes a photochromic-dichroic compound. The first photochromic compound and the photochromic-dichroic compound each are selected such that the photochromic-dichroic compound has an unactivated state terminal minimum absorbance wavelength that is less than or equal to the unactivated state terminal minimum absorbance of the underlying first photochromic compound. The present invention also relates to such photochromic articles that further include a topcoat layer over the photochromic-dichroic layer, the topcoat layer including a second photochromic compound that has an unactivated state terminal minimum absorbance wavelength that is less than the unactivated state terminal minimum absorbance wavelength of the underlying photochromic-dichroic compound.

A copolymer comprising at least one donor monomer and at least one acceptor monomer is described. The polymer may optionally further comprise, consist or consist essentially of at least one additional comonomer. Various donor monomers, acceptor monomers and additional comonomers are also described. The polymer is useful in the manufacture of microelectronic devices such as optoelectronic devices.

Processes for preparing a carbon black product having an organic group attached to the carbon black. In one process at least one diazonium salt reacts with a carbon black in the absence of an externally applied electric current sufficient to reduce the diazonium salt. In another process at least one diazonium salt reacts with a carbon black in a protic reaction medium. Carbon black products which may be prepared according to process of the invention are described as well as uses of such carbon black products in plastic compositions, rubber compositions, paper compositions, and textile compositions.

The invention discloses a fluorine-boron fluorescent dye as well as a preparation method and application thereof, wherein the structure of the fluorine-boron fluorescent dye is shown as a formula (I) or a formula (II), in the formula (I) and the formula (II), R1 is H or halogen; R2 is CN; R3, R4, R5 and R6 are independently selected from H, halogen, C1-C6 alkyl or C1-C6 alkoxy; V, W, X, Y and Z are independently CH or N, and when V, W, X, Y or Z is N, N has no substituent group. According to the fluorine-boron fluorescent dye and the preparation method thereof, the maximal fluorescence emission wavelength of the fluorine-boron fluorescent dye is 518-600nm, and the fluorine-boron fluorescent dye also has excellent fluorescence quantum yield and Stokes shift, which shows that the fluorine-boron fluorescent dye has good application prospect in the bioanalysis fields of fluorescence labeling, bioimaging and so on; meanwhile, the preparation method is simple in steps, and raw materials can be obtained easily.