205 results about "Spiropyran" patented technology

The present invention relates to an ultraviolet radiation detector in general and more specifically to a solar blind ultraviolet radiation detector; that is, a detector insensitive to the radiation of sunlight reaching the earth's surface but sensitive to UVC wavelengths in the spectrum, defined as the interval 200 nm-280 nm. The solar blind detector is base on the use of photochromic compounds in conjunction with ultraviolet wavelength-selective chemical blocks and their incorporation into optically clear polymer matrices. The photochromic compound is selected from the group comprising spiropyran molecules spirooxazine molecules and chromene derivatives. Applications for such device are as numerous as the sources of UVC radiation. An obvious use for such Solar Blind UVC detector is monitoring the output of UVC sources used in the decontamination of water and air (water treatment and air purification) and for sterilization of medical instruments.

A lithographic printing plate precursor comprising a support and an image-recording layer containing at least one compound selected from the group consisting of a spiropyran compound and a spirooxazine compound, and an acid generator, and a lithographic printing method including a process of removing the unexposed area of the image-recording layer on a printing press.

The invention relates to photochromic transparent organic materials presenting an index of refraction of more than 1.55, which are free of optical distortions and are prepared by radical polymerization of a polymerizable composition comprising: a) 80-95 wt % of at least one monomer represented by the general formula (I): ##STR1## where R=H or CH.sub.3, and m and n are independently 1 or 2; b) 5-20 wt % of at least one aromatic monovinyl monomer represented by the general formula (II): ##STR2## c) an effective quantity of at least one dye that imparts photochromic properties to the material, selected from the groups of spiroxazines, spiropyrans and chromenes; d) an effective quantity of a chain transfer agent; and e) an effective quantity of a radical polymerization initiator, characterized in that the chain transfer agent is a linear alkanethiol and the radical polymerization initiator is a diazo compound.

The invention relates to a method for preparing organic photochromic nanofibers, and the method comprises the following steps: dissolving organic photochromic compounds into a polymer solution so as to obtain a spinning solution; and preparing the spinning solution into nanofibers by using an electrostatic spinning technology, wherein the organic photochromic materials are spirooxazine type, spiropyrane type, diarylethene type, fulgide type and azo dye type photochromic materials, and the like; and the polymer materials refer to polyvinylpyrrolidone resins, polystyrene resins, polymethylmethacrylate resins, polyvinyl alcohol, polyethylene terephthalate (PET) resins and the like. The organic photochromic nanofibers prepared by the method provided by the invention have high sensitivity and excellent endurance performance, and can be applied to clothing materials for garments, shoes and hats, daily fabrics for fabrics and carpets, polymer fibers for cosmetics, discoloration windows, displays, chemical sensors and optical storage devices; and in the military field, the prepared organic photochromic nanofibers can be used for battle fatigues, tents, military machinery, and the like.

The present invention relates to a photochromic spirobenzopyran compound of the formula (1) and its derivatives, a spirobenzopyran group having unsaturated terminal groups, a polymer prepared therefrom, a method for the production thereof, a composition comprising said spirobenzopyran or said spirobenzopyran group-containing polymer and a photochromic switch film using the same: wherein the substituents are defined in the specification. According to the present invention, a polymer which possesses excellent mechanical properties and rapid photochromic switch properties at room temperature and a photochromic thin film for switch elements are produced. They are useful in applications such as photo switches, photochromic filters, light stabilizers, paper money or cards for preventing counterfeit forgeries, display elements, optical recording media or photo integrated elements.

A lithographic printing plate precursor comprising a support and an image-recording layer containing at least one compound selected from the group consisting of a spiropyran compound and a spirooxazine compound, and an acid generator, and a lithographic printing method including a process of removing the unexposed area of the image-recording layer on a printing press.

The present invention discloses a photothermally responsive smart energy saving composite film, and is comprised of a reversible photochromism containing a spiropyran material and a vanadium dioxide based reversible thermochromism material. The smart energy saving composite film can be used to prepare one or more layers of alternating and composite color-changeable films, and is both decorative and functional, which is suitable for the requirement of energy saving in architecture and can be widely used in spheres like doors and windows of buildings and energy-saving and safe glasses of cars as well as agricultural green house films. The smart energy saving composite film is based on the photothermal response technology, has a good color changing effect, a good anti-aging property and good stability, can reduce the energy consumption and carbon emission, and has a wide market prospect.

The invention provides a 1,8-naphthalimide-based light-controlled fluorescent molecular switch compound bonded with a bis-spilenpyran unit and a synthesis method and application of the compound. Firstly, bis-spiropyran is modified to a 1,8-naphthylimide molecule through a covalent bond, the compound shows a good photochromic effect and light-controlled two-color fluorescent molecular switch performance in an organic solvent and a solid medium, the fluorescence resonance energy transfer efficiency of the compound is greatly improved, and the thermodynamic stability and photosensitivity of the compound are also high. The 1,8-naphthalimide-based light-controlled fluorescent molecular switch compound bonded with the bis-spilenpyran unit and the synthesis method and application of the compoundcan be used in the field of ion detection and photochemical imaging of biological systems.

A photochromic material comprising a styrene-based oligomer having a weight average molecular weight of from 200 to 6000 and a photochromic compound selected from the group consisting of spirooxazine derivatives and spiropyran derivatives.

Disclosed is a coating composition for a plastic photochromic lens and the plastic photochromic lens coated with the same. The coating composition includes a spiropyran photovariable color compound and / or spirooxazine photovariable color compound dissolved in toluene, and an acryl based binder. The plastic photochromic lens coated with the coating composition has advantages of short variable time, and good adhesion of the coating composition to the plastic lens and UV prevention effect without an undesirable haze phenomenon.

The invention discloses a synthesis method of a spiropyrane small-molecule fluorescent probe with extreme acid / extreme alkaline switch response and an application of the spiropyrane small-molecule fluorescent probe. By virtue of the synthesis method, naphthalene nucleus spiropyrane with two carboxyl groups and a phenolic hydroxyl group is synthesized by carrying out modification on three loca of spiropyrane, wherein the naphthalene nucleus spiropyrane has the characteristic of reversible switch type response on pH values of extreme acid / extreme alkaline; when the pH value is smaller than 1.0, red fluorescence is represented; when the pH value is 1.0-12.0, fluorescence is represented; when the pH value is greater than 12.0, blue-green fluorescence is represented. The synthesized spiropyrane small-molecule fluorescent probe also has the characteristics of being high in optical, thermal and chemical stability and structural designability, and excellent in biocompatibility and cell labeling property; meanwhile, the synthesized spiropyrane small-molecule fluorescent probe is safe and low in low toxicity, and is capable of smoothly entering bacteria for bio-labeling, implementing the pH response of extreme acid / extreme alkaline as same as that of solutions in organisms; furthermore, the synthesized spiropyrane small-molecule fluorescent probe can be used as a multifunctional cell fluorescence labeling dye and can be applied to scientific research and gene diagnosis in the field of biological medicines.

The invention discloses cupric ion test paper and a preparation method. The cupric ion test paper of the invention includes a chromogenic piece, and chromogenic substance spiropyran in the chromogenic piece, the chromogenic piece can be chromatography, qualitative, and quantitative filter paper. The invention also includes a base plate, the chromogenic piece is arrange on the base plate, the base plate can be a hardness paper piece which is a polystyrene base plate or white color and non-absorbent. The cupric ion test paper of the invention has a flowing reparation method, which steps include that: a) spiropyran solution is prepared; b) the chromogenic piece is dipped into the spiropyran solution; c) the chromogenic piece is taken out from the spiropyran solution and is dried, further include d) one or more chromogenic pieces which are dried are fixed on the base plate, the chromogenic pieces can be fixed in row or in cascading. The test paper of the invention is easy to use, high sensitivity, greater selectivity and stability, easy to preserve and is applicable for detecting consistency of bivalent cupric ion in water solution.

The invention discloses a photochromic nano composite microsphere and an application thereof. The photochromic composite microsphere has a three-layer composite core-shell structure, an inner core isa zinc sulfide mesoporous nano microsphere, a middle layer is a photochromic layer formed by a spiropyran compound, and an outer layer is polyurethane; and the outer diameter of the composite microsphere is 50-350nm, wherein the diameter of the zinc sulfide mesoporous nanosphere is 30-250nm, the thickness of the middle layer is 5-25nm, and the thickness of the outer shell is 5-25nm. The photochromic composite microsphere provided by the invention can be used to prepare a photochromic coating or doped into a resin optical material to prepare a photochromic material. The material can be changedfrom colorless to colored under the irradiation of ultraviolet rays, and after the ultraviolet rays disappear, the material can be quickly faded into colorless, and has the advantages of strong fatigue resistance, good stability, a fast color change speed and the like.

A photochromic material comprising a styrene-based oligomer having a weight average molecular weight of from 200 to 6000 and a photochromic compound selected from the group consisting of spirooxazine derivatives and spiropyran derivatives.

Photochromic materials, such as spiropyran dyes, are disclosed that can be used for high-density optical storage and molecular switches. According to the disclosure these compounds can be used as transducers in optical sensors. When the spiropyran dye absorbs UV light it switches to the merocyanine form, and this structure has an active binding site for cations. When cations bind to the site, the resulting colored complex has a new absorption band in the visible spectrum. By shining white or green light on the colored complex, the dye is reverted to the closed spiropyran form, and the cation is released. The disclosure optimizes the immobilization of the spiropyran dye onto a polymer substrate via long chain alkyl groups. These long chain alkyl linkers enable the dye to reversibly form the preferred merocyanine (2):(1) cation sandwich complex.

The present invention discloses a trifluoromethyl containing quinazoline derivative and a preparation method and application thereof. The preparation method comprises the following steps of: under the condition that copper and ligand exist, an N-cyano substituted aryl carboxamides compound reacting with a togni reagent in a solvent, and after completion of the reaction, obtaining the trifluoromethyl containing quinazoline derivative after treatment. The reaction substrate is readily available, the operation is convenient, the obtained quinazolinone derivative is of rich diversity, the required reaction condition is mild, and the reaction time is short. The all-in-one-pot reaction is realized, and not only a structural mother kernel of quinazoline is obtained, but also trifluoromethyl is introduced into the mother kernel structure. And the quinazolinone compound contains the spiropyran compound can be synthesized, which cannot be achieved by the prior art. The obtained product has good activity in inhibiting enzyme acetylcholinesterase and butyrylcholinesterase.

The invention discloses a polymer waterborne paint with corresponding features to ultraviolet light. The paint is characterized by including, by weight, 1 part of nano polymer granular aqueous dispersion containing spiropyrane photochromic molecular groups and 1-50 parts of white waterborne paint, wherein the white waterborne paint is acrylate white paint or waterborne polyurethane white paint or alkyd resin white paint. The polymer waterborne paint with an ultraviolet light response feature is designed and synthesized; the synthesized polymer material contains methacrylic acid spiropyrane function groups, so that the polymer waterborne paint represents an ultraviolet photochromic effect feature. The polymer waterborne paint has the advantages of being easy to prepare, having a real-time clear color developing feature and being safe and the like, and has creative value.

The invention relates to the technical field of high-molecular polymer, and especially to a high-molecular polymer containing spiropyran group and a preparation method thereof and application thereof. The method uses spiropyran compound to perform modification processing for the polymer, makes the polymer graft a spiropyran group which is light / temperature-sensitive, and makes the prepared polymer become a material having light or temperature stimulate-response performance. The limited used polymer is degradable polymer with good biocompatibility, and can control the isomerization of the spiropyran group by using the light / temperature stimulation, and realize the graft modification function of the spiropyran group on the polymer. The prepared product can be objectives-oriented under the stimulation of external light or temperature, and be open to release or realize the function of the product quantificationally and regularly in fixed point.

The present invention relates to novel cross-linkable or crosslinked photochromic compositions, articles made from or coated with the compositions and method of making the compositions. The compositions contain (i) at least one segmented or non-segmented polyurethane-type or polyurethane-urea-type linear polymer having at least one non-terminal moiety that comprises at least one unsaturated group; and (ii) an effective amount of at least one photochromic organic compound, advantageously selected from spiroxazines, chromenes, spiropyrans fulgides and fulgimides.

The invention discloses a photosensitive polymer modified adsorbing material and a preparation method and application of the photosensitive polymer modified adsorbing material. Particularly, the preparation method of the photosensitive polymer modified adsorbing material comprises the following steps: (1) synthesizing a spiropyrane photosensitive monomer; (2) performing silane coupling agent modification to a substrate material; and (3) copolymerizing the photosensitive monomer and the modified substrate material. According to the photosensitive polymer modified adsorbing material, the oil-water selectivity and the oil-keeping performance of the original substrate material are enhanced, the adsorbing material has the characteristics of light-operated adsorption / desorption of oils and organic solvents, and compared with the method for extruding for deoiling by use of mechanical pressure, the method has the advantages that the intelligentized function is achieved, the space and the time are almost not limited, and the operation is easy.

The invention discloses spiropyran-based photo-thermal dual-responsive high-strength dual-network hydrogel and its preparation method and application. The preparation method comprises that poly(gamma-glutamic acid)glycidyl methacrylate is crosslinked to form a first network, the first network is swollen in a prepolymer solution containing ethyl 2-[1-acrylate-3', 3-dimethyl-6-nitro-spiro[indoline-2', 2-[2H-1]]-benzopyran]methacrylate and N-isopropylacrylamide until the swelling is complete, and the swollen product is taken out and is crosslinked to form the dual-network hydrogel. The dual-network hydrogel contains a photochromic spiropyran monomer and a temperature-responsive NIPAAm monomer so that the dual-network hydrogel has good mechanical properties, response to light and temperature stimulation, and a good application prospect in drug loading, biosensors and smart windows.

The invention relates to an indolin spiropyran derivative with photochromic property, ion detection function and thermal-photochemical stability. The indolin spiropyran derivative has a chemical structural formula shown in the attached figure. The indolin spiropyran derivative simultaneously has the photochromic property, ion detection function and thermal-photochemical stability. The invention discloses a preparation method of the indolin spiropyran derivative.

The invention belongs to the field of material chemistry and relates to a stable light storage material, in particular to a spirooxazine or spiropyran reversible photochromism film doped with optical acid polymers and a preparation method as well as use thereof. The spirooxazine or the spiropyran is taken as the raw material and respectively mixed with an optical functional doping mediump-optical acid polymer polyvinylidene chloride-methyl acrylate (PVDC). The film is prepared respectively on silex glass; acidoid chlorine hydride released by the PVDC under the irradiation of ultraviolet light is used for stabilizing the open-loop state of the doped spirooxazine or spiropyran; when the film is irradiated by visible light after being irradiated by ultraviolet light, the spirooxazine or spiropyran returns to the close-loop state. The spirooxazine or spiropyran reversible photochromism film doped with optical acid polymers is applicable to the preparation of light storage device.

The invention discloses preparation and application of optical switch fluorescence molecules with a hydrogen sulfide recognition function. According to obtained target molecules, properties of a group with hydrogen sulfide response and a spiropyran group with photoresponse are combined successfully, and the molecules in a water-based solvent not only can perform high-selectivity and high-sensitivity detection for hydrogen sulfide molecules, but also have good optical switch performance and can show rapid and reversible fluorescence switch performance under irradiation of ultraviolet light and green light. The optical switch fluorescence molecules with the hydrogen sulfide recognition function have great application prospect in the technical fields of hydrogen sulfide detection, environmental protection, super-resolution imaging, life science and the like.

Novel spiropyran compounds, particularly with photochromic properties, are disclosed, as well as photochromic compositions and ophthalmic articles containing said compounds. The photochromes have been designed so as to have a high colorability, a high sensitivity to activating radiation breaking the pyran ring, to be entirely or practically free from coloration in a non activated non exposed state, to have an intense coloration following activation and a high coverage of the visible spectrum in combination with at least one other photochrome, and to have high rates of coloration / decoloration. The spiropyrans are easily produced and photochemically stable, and are, e.g., of formula (i), wherein L=(a); (b).

The invention discloses a preparation method of a photochromic latex emulsion, which comprises the following steps: preparing an organic solvent solution of spiropyrane and spiro(oxa)zine organic chromic compound and a colloidal solution of cellulose / hemicellulose or derivatives thereof; adding an optical bleaching agent or mixture of the optical bleaching agent and one or two of PVA (polyvinyl alcohol), PEG (polyethylene glycol) and starch into the colloidal solution; and by using the hydrophilic latex presheared by a dispersion machine as a carrier, dropwisely adding the chromic compound organic solvent solution and the colloidal solution of cellulose / hemicellulose or derivatives into the presheared hydrophilic latex under low rotation speed, thereby preparing the photochromic latex emulsion. The photochromic latex emulsion disclosed by the invention is used in optical decorating materials, daily necessities and anti-counterfeiting materials. The method obviously increases the chromic speed and discoloration speed of the spiropyrane and spiro(oxa)zine organic chromic compound, and the chromic and discoloration sensitivities under irradiation can be respectively enhanced by more than 1.5 times / 13 times.

The invention provides a chiral fluorescent probe with spiropyran characteristics as well as a preparation method and application thereof. The preparation method comprises the following steps: heating1-propionic acid-2,3,3-trimethylindole quaternary ammonium salt and (S)-2,2'-dihydroxy-1,1'-naphthalene-3,3'-dialdehyde group to react in ethanol in the presence of piperidine, and separating and purifying after the reaction is finished to obtain a product. The spiropyran chiral fluorescent probe is easy in obtaining raw materials and simple in synthesis, can not only enantioselectively identifyphenylalanine in an aqueous solution, but also can perform the fluorescence imaging for phenylalanine in cells, and has wide application prospect in the field of chiral identification.

The invention discloses a force-sensitive color-changing self-repairing intelligent polyester elastomer and a preparation method thereof, and belongs to the technical field of polyester elastomer materials. A ureido pyrimidone structure and a spiropyran ring structure are introduced into a polyester elastomer polymer chain; a tetrahydrogen bond easily reversibly formed between the molecular structures of the ureido pyrimidone structure to realize self repairing of a polyester elastomer material, and the breakage of a spiropyran ring causes a color change on the surface; and a stress state of the polyester elastomer material is qualitatively judged by the color change. The preparation method disclosed by the invention is relatively easy to operate, short in reaction time, simple in post-treatment and relatively high in yield; and the prepared polyester elastomer material is relatively long in service life and can detect and prewar an external force.

The invention relates to a solar energy fuel, wherein in an elastic aerogel comprising carbon nano-tubes and graphene, photoinduced isomers (such as azobenzene or a compound containing an azobenzene group, a spiropyran compound, a diaryl vinyl compound and the like) are grafted on the wall of the carbon nano-tubes. A purpose of the present invention is to provide a novel way adopting solar energy and overcome problems of energy storage, difficult equipment moving and the like in the existing way adopting solar energy. According to the present invention, carbon nano-tubes (or addition of graphene) is adopted to prepare the sheet-like (or flannel-like) elastic aerogel, and then two photoinduced isomers with stable structure and different energy levels are covalently grafted, or two photoinduced isomers with stable structure and different energy levels are covalently grafted on carbonnano-tubes, and then the functionalized carbon nano-tubes are adopted to prepare the sheet sponge-like elastic aerogel; and the prepared solar energy fuel of the present invention provides the novel approach for the solar energy utilization.