161 results about "Photosensitizing compounds" patented technology

To provide a photosensitive paste that permits pattern formation with a high aspect ratio and a high accuracy and to provide a plasma display including the photosensitive paste, by using a photosensitive paste that includes, as essential components, an inorganic particles and an organic component that contains a photosensitive compound with the difference between the average refractive index of the organic component and the average refractive index of the inorganic particles being 0.1 or less.

A method for preparing a multilayer of nanocrystals. The method includes the steps of (i) coating nanocrystals surface-coordinated by a photosensitive compound, or a mixed solution of a photosensitive compound and nanocrystals surface-coordinated by a material miscible with the photosensitive compound, on a substrate, drying the coated substrate, and exposing the dried substrate to UV light to form a first monolayer of nanocrystals, and (ii) repeating the procedure of step (i) to form one or more monolayers of nanocrystals on the first monolayer of nanocrystals. Further, an organic-inorganic hybrid electroluminescence device using a multilayer of nanocrystals prepared by the method as a luminescent layer. The luminescent efficiency and luminescence intensity of the electroluminescence device can be enhanced, and the electrical properties of the electroluminescence device can be controlled by the use of the multilayer of nanocrystals as a luminescent layer.

The invention discloses a pharmaceutical composition of pH-sensitive liposome nanoparticles for lodging in a target tissue cell in situ of an animal subject, the nanoparticles comprising a proton-releasing photosensitive compound that releases protons upon photolysis, wherein the compound is in vesicles of the liposomes. A light or UV light is provided to induce the photosensitive compound to release the protons, thus the released protons causing the pH-sensitive liposome to decompose.

Preconditioning mouth rinse, which pre-treats the teeth to better receive a whitening formula containing a photosensitive compound, and a hand-held consumer light source for tooth whitening, which provides rapid tooth whitening, are disclosed. The light source may use a specific range of visible light and also emit heat sufficient to raise the temperature of the teeth a desired amount at a depth up to about 2 mm in the range of about from 1-5° Celsius over a predetermined period of time. The specified wavelengths of the hand-held consumer operable light will activate the photosensitive substance in the whitening formula. The oxidizing compounds may be transparent to light enabling light energy to activate the oxidizing compounds directly on the tooth surface, or to activate a photosensitizing or photosensitive compound added to produce the desired temperature increase.

The present invention provides a photosensitising composition comprising a mixture of: at least one surfactant; at least one alcohol; and/or water, with the proviso that when the at least one surfactant is an alcohol, it is different from the at least one alcohol. In particular, the composition may comprise a mixture of glycerol, ethanol and water. Alternatively, the composition may comprise a mixture of polyethylene glycol, ethanol and water. The photosensitising composition may further comprise at least one photosensitising compound. The present invention also provides a method of treating and/or preventing conditions caused by microorganisms in a subject.

A method of authenticating products or packaging by analyzing key ingredients on products or on product packaging is disclosed. Light-sensitive compounds can be used to identify the product or product packaging. The product or product package may include visible or invisible ink containing a particular light-sensitive compound. One or more light-sensitive compounds and ink, if used, may be printed in one or more locations on the product or product packaging to produce an authentication mark to inhibit inadvertent or intentional removal of the mark, thereby rendering the mark tamper-resistant. The mark is sealed to isolate the mark from the environment. A device may be used to irradiate the mark and read light absorption or emission. A controller determines the authenticity of the mark by comparing the emitted or absorbed properties to a standard.

A broad class of photosensitive compounds having enhanced in vivo target tissue selectivity and versatility in photodynamic therapy. Many furocoumarin compounds, such as psoralens, exhibit cytostatic activity when photoactivated but exhibit little in vivo specificity for selectively accumulating in any particular target tissue such as atheromatous plaques. Reactive Oxygen Producing Photosensitizers ("ROPPs") are photoactivatable compounds having an affinity for hyperproliferating cells (such as atheromatous plaque cells), which when photoactivated, produce cytotoxic reaction products. The photoactivity of a ROPP, such as a porphyrin, may be reduced by metalating the porphyrin while the selective affinity of the metalized ROPP for hyperproliferating tissue remains substantially unchanged. By linking a furocoumarin compound to a ROPP to form a F-ROPP, the cytostatic properties of the furocoumarin portion of the F-ROPP can be exploited while the selective affinity of the ROPP portion of the compound for hyperproliferating cells such as atheromatous plaque provides enhanced tissue selectivity without cytotoxicity. In vivo, certain F-ROPPs may be forced to selectively accumulate in a target tissue by illuminating only the target tissue with light having a wavelength operable for photoactivating the F portion of the F-ROPP thereby causing the F-ROPP to either form a monoadduct with or crosslink the cellular DNA in the target tissue. Light of a second wavelength can then be delivered to the target tissue to photoactivate the ROPP portion causing further interference with cellular activity.

The present invention provides safe paint and coating compositions comprising at least one environmentally acceptable phytochemical such as, but not limited to capsicum, grapefruit seed extract and menthol suitable for use in preventing the colonization of a treated surface by a variety of biological species. One aspect of the invention is anti-fouling marine paints (coatings). Another aspect of the invention of the present invention provides paint and coating compositions comprising phytochemicals for use as an architectural paint. The compositions of the invention can further comprise control release agents such as, for example, antioxidants, oxidizers or photosensitive compounds to promote sustained release of the anti-colonization agents at the treated surface and to assist in the abrasion of the paint surface to mechanically dislodge the attaching organisms.

Highly hydrophilic indole and benzoindole derivatives that absorb and fluoresce in the visible region of light are disclosed. These compounds are useful for physiological and organ function monitoring. Particularly, the molecules of the invention are useful for optical diagnosis of renal and cardiac diseases and for estimation of blood volume in vivo.

Disclosed is a method of manufacturing a composite member having a conductive pattern, comprising (1) forming on a surface of an insulating body a photosensitive layer containing both a photosensitive compound forming an ion-exchange group upon irradiation with an energy beam and a crosslinkable compound having a crosslinkable group, (2) forming a pattern of ion-exchange groups by selectively exposing the photosensitive layer to an energy beam so as to form an ion-exchange group in the exposed portion, (3) crosslinking the crosslinkable compound contained in at least the exposed portion of the photosensitive layer, (4) allowing metal ions, or a metal colloid to be adsorbed on the pattern of ion-exchange groups formed by the selectively exposing, and (5) forming a composite member having conductive pattern by depositing a conductive material on the pattern of ion-exchange groups having the metal ions, or the metal colloid adsorbed thereon using an electroless plating.

A photosensitive insulating resin composition includes (A) an alkali-soluble resin that contains (a1) a structural unit derived from a crosslinkable monomer and (a2) a structural unit having a phenolic hydroxyl group, (B) a crosslinking agent, (C) a photosensitive compound, and (D) a solvent.

To provide a conductive composition including: a binder, a photosensitive compound, metal nanowires, and a solvent, wherein the solvent has a solubility parameter value of 30 MPa^1/2 or less.

The invention provides positive-acting chemically-amplified photoresist compositions that can provide excellent lithographic performance as well as significantly enhanced storage stability. In one aspect, photoresist compositions are provided that comprise a solvent that is free of hydroxy groups (i.e. non-hydroxylic solvent), a resin binder and a photoactive compound that exhibits enhanced and long-term solubility in the solvent. In a further aspect, resists are provided that are formulated in a hydroxyl-containing solvent such as ethyl lactate and that contains a sulfonium salt photoactive compound that includes a sulfonate counter anion that can provide enhanced storage stability for the resist.

The invention is to provide a photosensitive compound suitable for a photoalignment method, a photosensitive polymer prepared from the compound, a photoaligning agent by using the compound and a liquid crystal alignment film prepared from the photoaligning agent. A photosensitive compound represented by formula (1):

in formula (1), Y¹ is a divalent group represented by formula (2-1) or (2-2); A¹ is 1,4-phenylene or 1,4-cyclohexylene; Z¹ is a single bond, —COO— or —OCO—; R¹ and R² are each independently hydrogen, fluorine or alkyl having 1 to 5 carbons; Q¹ is independently a single bond or alkylene having 1 to 12 carbons; and n is 0 or 1. In formulas (2-1) and (2-2), W¹ and W² are each independently hydrogen, alkyl having 1 to 3 carbons or alkoxy having 1 to 3 carbons.

Benzylidene substituted 2,4-pentanedione compounds without having phenolic hydroxyl group(s) are found to provide photostability to otherwise photosensitive compounds and compositions.

A photosensitive compound whose size is smaller than conventional polymer for photoresist, and which has well-defined (uniform) structure, and a photoresist composition including the same are disclosed. The photosensitive compound represented by the following formula. Also, the present invention provides a photoresist composition comprising 1 to 85 wt % (weight %) of the photosensitive compound; 0.05 to weight parts of a photo-acid generator with respect to 100 weight parts of the photosensitive compound; and 10 to 5000 weight parts of an organic solvent.

In the formula, n is 0 or 1, x is 1, 2, 3, 4 or 5, y is 2, 3, 4, 5 or 6, z is 0, 1, 2, 3 or 4, R, R′ and R″ are independently hydrocarbon group of 1 to 30 carbon atoms, preferably 2 to 20 carbon atoms, and R′″ is a hydrogen atom or hydrocarbon group of 1 to 30 carbon atoms, preferably 2 to 20 carbon atoms.

A colored photosensitive resin composition comprising an alkali-soluble resin, a photosensitive compound, a curing agent, a solvent and a colorant represented by the formula (I):

The colored photosensitive resin composition can form a color filter array which shows good spectral characteristics.

Disclosed herein is a photoresist composition suitable for coating onto a large substrate and having improved coating uniformity to prevent occurrence of stains, a coating method thereof, a method of forming an organic film pattern using the same, and a display device fabricated thereby. The present invention thus provides a photoresist composition comprising a polymeric resin with an incorporated polysiloxane resin, a photosensitive compound, and an organic solvent. Accordingly, the photoresist composition can be coated onto a large substrate by a spinless coating method, and thereby coating uniformity can be improved, the occurrence of stains such as cumulous stains and resin streaks can be prevented, and the coating rate and quality of a final product prepared using the photoresist composition can also thereby be enhanced.

A solid dye sensitization type solar cell includes a substrate, a first electrode disposed on the substrate, an electron transport layer including an electron transport semiconductor and disposed on the first electrode, the electron transport layer including a photosensitizing compound adsorbed on a surface of the electron transport semiconductor, a hole transport layer disposed on the electron transport layer, and a second electrode disposed on the hole transport layer. Each of the first electrode and the second electrode includes divided multiple electrodes.