60results about "Hydroxy-anthraquinone dyes" patented technology

The invention provides an anthraquinone derivative, as well as a preparation method and application of the anthraquinone derivative serving as an antibacterial agent. The preparation method comprises the following steps: culturing a strain of Nigrospora sp. (HM565952) in a strain culture medium; fermenting the nigrospora sp. in a fermentation culture medium; filtering the fermentation broth, removing thallus, and extracting the fermentation broth with ethyl acetate; concentrating the extract, and performing chromatographic separation, and concentrating the eluent to obtain two types of yellow powder, namely 3,5,8-Trihydroxy-7-methoxy-2-methylanthracene-9,10-dione and austrocortirubin; and adding an acetic anhydride reagent in a solution dissolved with the compound, and reacting to obtain the anthraquinone derivative. The anthraquinone derivative obtained from the Nigrospora sp. (HM565952) has selective inhibitory activity to Bacillus subtilis, Bacillus cereus, Micrococcus tetragenus, Micrococcus lutea, Escherichia coli, Staphylococcus aureus, Staphylococcus albus, Vibrio parahaemolyticus and Vibrio anguillarum, and can be used for developing selective bacteriostatic agents; and the raw materials can be produced on a large scale, and not limited by resources. Therefore, the anthraquinone derivative has the advantage of wide application prospect.

The invention discloses a novel process for producing 1,4-dihydroxy anthraquinone, and relates to the technical field of chemical production. The technological process is as follows: firstly, co-heating and dehydrating fuming sulphuric acid and boric acid for 30-60 minutes, adding phthalic anhydride, heating up to 130 DEG C, adding parachlorophenol into the reaction system for multiple times in batches, heating up to 200-205 DEG C after adding the parachlorophenol, continuously reacting for 5-10 hours, slowly putting a reactant in 8 times by volume of water for hydrolysis after the reaction is finished, controlling the hydrolysis temperature at 100-130 DEG C, extracting the product to an organic phase by use of a solvent after hydrolysis, discharging the lower-layer waste acid, washing the upper-layer extracting solution by use of hot water, distilling the solvent for cycle use, and carrying out high-vacuum distillation and sublimation to obtain high-quality 1,4-dihydroxy anthraquinone. The novel process disclosed by the invention is used for improving the product yield and reducing the production cost by regulating process conditions such as raw material feeding ratio, feeding method, feeding temperature and the like on the premise of ensuring the product yield and the product quality.

The invention provides an image fading preventing agent capable of preventing the discoloration/fading of an image formed and stably retaining its image quality over a long period of time, as well as an image forming element, a recording medium, an image forming method and an image using the agent. The image fading preventing agent is used in a region in which an image is formed by a coloring material, and has a functional group to cause intramolecular proton transfer in its molecule. An image is formed by the image forming element, recording medium or image forming method using the agent.

The invention relates to the technical field of aggregation-induced luminescent materials, and provides an asymmetric 9,10-dithienylanthracene fluorescence compound. [9-thienyl,10-(5-vinylbenzothiazolyl)-2-thienyl]anthracene (DAT-BT) and [9-thienyl, 10-(5-vinylbenzoxazolyl)-2-thienyl]anthracene (DAT-BO) have significant AIE characteristics and a significant mechanical grinding discoloration characteristic. The invention also provides a preparation method of the compound. The preparation method provided by the invention has the advantages of simple steps, low cost, mild preparation conditions,suitableness for industrial production, and great application prospect. The invention further provides applications of the asymmetric 9,10-dithienylanthracene fluorescence compound in cell fluorescence imaging, organic photoluminescence materials and mechanical photochromic materials.

The invention discloses dyestuff with a polymerizable group and the preparation of microspheres containing dyestuff. Dyestuff molecule covalence is bound into resin, and is compatible with other dewatering systems of resin, paraffin and the like, and the problem that pigment particles are can not be compatible in a scattering system easily is overcome; dyestuff exists in colourment in a molecule state, colorless particles can be completely eliminated, and the product quality can be improved. According to the dyestuff, emulsion is formed by a membrane emulsion method, and is polymerized again so as to obtain polymeric microspheres which are good in size, shape and uniformity, and have narrow particle diameter distribution, and the microsphere particles are regular in shape, are fresh in color, and have glossiness.

The present invention provides one or more dichroic dyes which exhibit high solubility in liquid crystal and a high order parameter. The dichroic dyes each have a first substituent having at least one cis-cyclohexane ring and/or a second substituent having at least one trans-cyclohexane ring. The dichroic dye(s) may be provided as a mixture including at least a first dichroic dye having at least the first substituent and a second dichroic dye having at least the second substituent. The dichroic dye(s) may also be provided as a plurality of dichroic dyes, each of the molecules of which has at least the first substituent and the second substituent. The present invention also provides a liquid crystal composition and a liquid crystal element including the one or more dichroic dyes.

The invention relates to an inorganic-organic hybrid compound as an ion compound, composed of an inorganic cation and an organic anion active substance and optionally, an organic anion fluorescent dye.

The present invention provides a novel alizarin derivative compound and a simplified and low cost method for preparing an alizarin derivative compound including: obtaining a compound represented by Formula (2) using a compound represented by Formula (3); and obtaining an alizarin derivative compound represented by Formula (1) using the compound represented by Formula (2); in Formulae (1) to (3), R¹ represents a hydrogen atom or a substituent; n represents an integer of 1 to 3, L represents a specific alkyl group; Q represents an atomic group needed to form an aromatic ring or a heteroaromatic ring with adjacent carbon atoms; and P represents an atomic group which includes an atom(s) selected from a hydrogen atom, a carbon atom, an oxygen atom, a sulfur atom, a silicon atom and a boron atom, and which is needed to form a ring structure group with adjacent two oxygen atoms and two carbon atoms;

Quaternary ammonium salts were incorporated into anthraquinone dyes via a stable linkage. The structure of the antimicrobial colorants were characterized by Fourier Transform Infrared (FTIR), Nuclear Magnetic Resonance (NMR) and UV-vis spectrometry. The dyes demonstrated excellent antimicrobial ability against both gram-negative and gram-positive bacteria in aqueous solution, as indicated by very low minimum inhibitory concentration (MIC). The colorants showed excellent stability in water under light, continuous heating as well as acidic and alkaline conditions.

The invention discloses a 6-(azacyclo-substitute) anthraquinone platinous chloride complex as well as a preparation method and an application thereof. The 6-(azacyclo-substitute) anthraquinone platinous chloride complex disclosed by the invention has the structure of a formula I. The complex disclosed by the invention has good anti-tumor activity and security, and has great application values in treating lung cancer, liver cancer, leukemia, colon cancer and ovarian cancer in the medicine field.

The present invention relates to relates to 9, 10-dihydro anthracene chromophore compound and its preparation. The preparation process includes the following steps: introducing two formyls with 1, 1-dichloromethyl ether as formylation reagent to the methoxyl para position of the material 1, 8-dimethoxyl-9, 10-dihydro anthracene under the catalysis of Lewis acid and titanium tetrachloride to obtain 4, 5-dimethoxyl-1, 8-diformyl-9, 10-dihydro anthracene; and the reflux reaction between 4, 5-dimethoxyl-1, 8-diformyl-9, 10-dihydro anthracene and isophorone -malononitrile condensate or isophorone -barbituric acid condensate in absolute alcohol as solvent in the catalysis of hexahydropyridine and acetic acid to obtain the organic compound. The compound of the present invention has high second-order non-linear coefficient and excellent transmittancy and may be used as second-order non-linear optical material, especially laser frequency doubling material.

The liquid crystal composition of the present invention contains a compound represented by the following Formula (1) and a liquid crystal. In Formula (1), at least one among R¹ to R⁷ is a liquid crystalline substituent, and those among R¹ to R⁷ that are not a liquid crystalline substituent each independently represent a hydrogen atom or a substituent. X and Y each independently represent an alkyl group, a halogen atom, an alkoxy group, or an alkylthio group. Z represents an alkyl group having 3 or more carbon atoms, an acyl group, or an aryl group. A represents an oxygen atom, a sulfur atom, or a nitrogen atom. n represents 0 or 1. The liquid crystal device, reflection display material, and light modulating material of the invention contain the liquid crystal composition.

The invention provides a method for synthesizing an anthracene fluorescent dye, which is used for solving the problems of difficult preparation of a key intermediate and low yield when the anthracenefluorescent dye is synthesized. The method has the advantages of easily available raw materials, mild reaction conditions and reduced operation risk. The synthesis method mainly comprises the following six steps: reacting m-halogenated phenol or substituted m-halogenated phenol with formaldehyde in an acidic solution, and purifying to obtain a diphenylmethane derivative, namely a first intermediate product; converting the phenolic hydroxyl group of the first intermediate product into methyl ether or silyl ether to obtain a diphenylmethane derivative with phenolic hydroxyl group protecting groups, namely a second intermediate product; converting the second intermediate product into an organic lithium salt, and reacting the organic lithium salt with a dihalogenated compound to generate an anthracene derivative, namely a third intermediate product; oxidizing the third intermediate product to obtain an anthrone compound, namely a fourth intermediate product; reacting the fourth intermediate product with a Grignard reagent to obtain a fifth intermediate product; and removing the phenolic hydroxyl protecting groups to obtain the fluorescent dye.

The invention belongs to the technical field of natural pigments, and relates to a color-protecting agent and method for improving thermal stability of cochineal dye. The color-protecting agent is prepared from the following raw materials, in parts by mass: 0.1-0.4 part of tea polyphenols, 0.02-0.05 part of papaya flavone, and 0.5-1.5 parts of glucomannan; the color-protecting agent is prepared bydispersing the raw materials into a mixed solvent; and the above color-protecting agent is added into the cochineal dye, and uniform mixing is performed to form a mixture of the cochineal dye and thecolor-protecting agent. According to the color-protecting agent and method for improving the thermal stability of the cochineal dye provided by the invention, the thermal stability of the cochineal dye can be effectively improved, and discoloration of the cochineal dye due to heat during processing and storage of the cochineal dye can be avoided; and meanwhile the tea polyphenol and papaya flavone antioxidants are slowly released under the action of the glucomannan, so that the effect effective duration of the color-protecting agent can be effectively prolonged.

The present invention relates to a disperse dye composition containing a disperse dye and the like represented by formulas (1) through (4), and a method for dyeing a hydrophobic fiber material using the same. The present invention provides a disperse dye composition and a mixed disperse dye composition that not only have strong light fastness of each color, but also well-balanced light fastness between the three primary colors, and uniform dye properties during dyeing. The present invention also provides a method for dyeing using the disperse dye composition and the mixed disperse dye composition.

Combinations of individual colorant compounds that provide effective toning (or bluing) to combat yellowing within polyester articles (such as bottles, containers, and the like) are provided. Such a novel toner combination permits effective neutralization of yellowness while also providing highly desirable low haze and increased brightness due to a sharp absorption peak within the needed range of wavelengths (e.g., from about 565 to 590 nm) and a narrow half-height band width. Furthermore, such a combination of compounds is preferably liquid in nature and may thus be incorporated within an added ultraviolet absorber solution or shelf-stable dispersion to facilitate addition within target polyesters at various stages of production. The particular UV absorbers desired as additives within target polyesters also tend to exhibit certain yellowing effects that require attention as well. The inventive combination bluing agent thus also accords effective neutralization of such UV absorber yellowing as well. Methods of production and liquid UV absorber/individual bluing agent formulations are also encompassed within this invention.