135 results about "Chromophore" patented technology

The invention belongs to the field of medical instrument coloring agents, and provides a natural anthocyanin endoscope coloring agent. According to the invention, the innovative design of combining a ternary color-stabilizing compound formed by anthocyanin, a co-chromophore and hydroxypropyl beta cyclodextrin with a chitosan sodium alginate polysaccharide system and a composite buffer system is adopted, and the viscosity is controlled to be 200-320 millisecond, the particle size of spray droplets is 40-60 microns, and the thickness of a thin film is 10-30 microns through specific molar ratio compatibility and a genipin crosslinking technology. Through accurate regulation and control, the excellent performance that a double-network thin layer is formed under the calcium ion environment that the absorbance retention rate at 520 nanometers is not lower than 90% and the elution rate is not lower than 90% under the irradiation of hundred thousand lux white light is achieved, the technical problems that a traditional endoscope coloring agent is poor in safety, low in stability and insufficient in mucous membrane contrast ratio are solved, and the wide clinical application value is achieved.

Photoacoustic medical-device navigation systems and methods provide alternatives to those incorporating fluoroscopy for medical-device navigation in patient bodies. A medical-device navigation system can include an optical-fiber stylet, ultrasound transducers, and a console. The stylet can transmit light to an instant location of a distal tip of an elongate medical device in a patient's body and, thereby, irradiate endogenous chromophores to generate ultrasound-frequency photoacoustic pressure waves therefrom. The ultrasound transducers can detect ultrasound signals corresponding to the photoacoustic pressure waves. The console can instantiate medical-device navigation processes for navigating the elongate medical device via the stylet as the elongate medical device is advanced to the target location in the patient's body. The medical-device navigation processes can include acquiring ultrasound-signal data from the ultrasound transducers, reconstructing images from the ultrasound-signal data, and displaying reconstructed images on a display for navigating the elongate medical device to the target location in the patient's body.

The invention discloses a mercury ion detection fluorescent probe based on quinoline as well as a preparation method and application of the mercury ion detection fluorescent probe. The fluorescent probe and a structural formula of the fluorescent probe are shown as a formula I in the specification. A quinoline derivative, namely 2-methyl-7-hydroxyquinoline, is used as a fluorescent chromophore, a thioester group is used as a recognition group, and the prepared fluorescent probe shows high sensitivity and high selectivity on Hg < 2 + > in a solution. The preparation method of the fluorescent probe is simple in steps, raw materials are easy to obtain, and the obtained product is a white flocculent solid, is easy to store, has a wide application prospect and can be produced and applied on a large scale.

The present invention relates to a method for functionalizing a biopolymer having an -OH group or an -NH2 group by reacting the biopolymer with at least one compound having at least one C=C bond or C≡C bond and containing a chromophore that absorbs UV-Vis radiation directly adjacent to this bond. The present invention also relates to a method for obtaining a solid biopolymer material by reversibly crosslinking the functionalized biopolymer obtained by the above method under UV-Vis light irradiation. Furthermore, the present invention relates to the use of functionalized biopolymers as support materials for 3D bioprinting, or as materials for manufacturing structures selected from spheroids, organoids, artificial organs, coatings, and tissue models.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores containing furanyl accepting groups, including (2) compositions / materials / resistive layers comprising NLO chromophores containing furanyl accepting groups, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores containing furanyl accepting groups (e.g., methods of drying and / or poling, and the like), (3) uses of NLO chromophores containing furanyl accepting groups in electro-optic devices (e.g., EOMs).

The present application relates to ferroelectric nematic liquid crystal (FNLC) compounds characterized by chemical structures having electron donor–acceptor chromophores connected via linkers. The compounds have a general structure of A1–L1–A2–L2–(Ax–Ly)n–B, where A and B are aryl or heteroaryl groups, and L are linkers selected to promote spontaneous polar alignment in the nematic phase. The FNLCs enable enhanced second-order nonlinear optical properties and electro-optic coefficients (r33), with values exceeding, e.g., 30 pm / V in some embodiments. The FNLC compounds also exhibit absorption maxima above 400 nm, indicating extended π-conjugation and strong intramolecular charge transfer. The present application also includes compositions and mixtures of such compounds, which may form glassy ferroelectric nematic phases suitable for integration into nonlinear optical devices.

To provide a chromophore useful for being included in a film having electro-optical activity and an electro-optical device.SOLUTION: There is provided a compound represented by formula (A).SELECTED DRAWING: Figure 6A

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores, including (2) compositions / materials / resistive layers comprising NLO chromophores, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores (e.g., methods of poling and / or drying, and the like), (3) uses of NLO chromophores in electro-optic devices (e.g., electro-optic modulators (EOMs)). NLO chromophores disclosed herein not only have large EO effect, but also have fast modulation speed. In addition, NLO chromophores disclosed herein have superior refractive index, photostability and thermal stability compared to other EO Materials. As a consequence, NLO chromophores herein are particularly suited for use as EO materials in connection with low power and small footprint devices, including devices used in data acquisition systems, analog I / O modules, field transmitters, lab and field instrumentation, servo drive control modules, direct current (DC) power supply, alternating current (AC), and / or electronic load.

In some embodiments, a material comprises a contiguous block of chemically-modified wood infiltrated with an index-matching polymer. The contiguous block has a first section that is substantially transparent to light and a second section that is translucent or opaque. The first section can have a lower lignin content than the second section. Alternatively, the first section can have a chromophore state altered from that of the wood in its natural state, and the lignin in the second section can retain a chromophore state of the wood in its natural state. In some embodiments, a material comprises a section of wood chemically-modified such that chromophores of lignin within the wood in its natural state are altered or removed, and the section retains at least 70% of the lignin of the wood in its natural state. Methods for forming such materials are also disclosed.

The invention relates to the technical field of tobacco processing, in particular to a method for inhibiting oxidative discoloration of a colorant for colored cigarette paper, and aims to solve the problem that when water-soluble azo acid dyes (such as lemon yellow and sunset yellow) coexist with a citrate combustion improver, synergistic degradation is easy to occur under illumination and high-temperature processing conditions to cause discoloration. Sodium hexametaphosphate with the mass being 0.5%-10% of that of dye is introduced into a coloring system to serve as a stabilizer. Sodium hexametaphosphate not only can chelate metal ions in a system, but also can effectively block free radical chain reaction caused by citrate, and reduce direct attack of alkali metal ions on dye chromophores, so that efficient color protection is realized through an ion isolation-free radical quenching dual mechanism. Experiments show that dye conversion can be remarkably inhibited, the inhibition rate can reach 85% or above under the optimal addition amount, and the batch color difference problem of colored cigarette paper is fundamentally solved.

The application discloses an application of a photocatalysis-PMS activation catalyst based on a Co-MOF / TiO2 heterojunction, and specifically, TiO2 nanosheets are coupled with a porphyrin-based MOF to construct a Co-MOF / TiO2 heterojunction hybrid material; the material has the performance of synergistic photocatalysis of persulfate activation and is used for catalyzing a refractory bisphenol A; the compound is an effective synergistic photocatalyst and has many advantages: (i) the porous structure of the metal organic framework promotes the mass transfer of the catalytic process, thereby further promoting the catalytic process; (ii) the chromophore at the center of the porphyrin structure can enhance the light capturing capacity of the metal organic framework (under visible light, photo-induced electrons continuously migrate to the adsorbed PMS, promoting the activation process of the PMS); (iii) the heterojunction formed between TiO2 and Co-porphyrin ligands further promotes the separation of photo-generated carriers.

Disclosed are: a fluorescent compound represented by general formula (I), (I)′, or (I)″, as a fluorescent compound which has high retention in a lipid bilayer, has excellent ease of handling, and can achieve uniform dyeing in a dyeing target; and a lipid bilayer dyeing method and an endocytosis detection method using said compound.Ch is a hydrophobic-field-sensitive fluorescent chromophore in which the fluorescence intensity increases in hydrophobic environments; A-H is an anionic functional group capable of generating anions by deprotonation; Xn+ is a positive ion having biological compatibility; n is 1, 2, or 3; L is a linker that binds to a hydrophobic-field-sensitive fluorescent chromophore and links the fluorescent chromophore and the anionic functional group; and LH+ indicates a state wherein the linker, which contains a cationic functional group capable of generating cations by protonation, has generated a cation by protonation.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores containing furanyl accepting groups, including (2) compositions / materials / resistive layers comprising NLO chromophores containing furanyl accepting groups, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores containing furanyl accepting groups (e.g., methods of drying and / or poling, and the like), (3) uses of NLO chromophores containing furanyl accepting groups in electro-optic devices (e.g., EOMs).

The invention discloses pyridine DPP fluorophore extension type deoxyuridine as well as a preparation method and application thereof, and belongs to the field of biological medicine and detection. The invention provides a uridine analogue modified by a fluorescent chromophore DPP derivative with a structure shown in the specification, and pyridine DPP fluorophore extension type deoxyuridine has excellent fluorescent property, can be used as a fluorescent probe, and is widely applied to the fields of biochemistry, medicine and the like.

The invention relates to the technical field of organic semiconductor materials and organic light-emitting diodes, in particular to a heavy isotope substituted organic semiconductor material and an organic light-emitting device comprising the same. The organic semiconductor compound comprises a chromophore, the chromophore has a chemical formula I: (Cx1Hx2Nx3Ox4Sx5Six6MyRz) n, when C atoms, N atoms, O atoms, S atoms and Si atoms appear in the chromophore, the C atoms, the N atoms, the O atoms, the S atoms and the Si atoms are respectively and independently substituted by corresponding 13C atoms, 15N atoms, 18O atoms, 34S atoms, 29Si atoms and 30Si atoms partially or completely, and at least one atom is substituted. The performance of the organic semiconductor material substituted by the heavy element is improved, such as higher luminous efficiency and better stability. Correspondingly, the organic electroluminescent device containing the organic semiconductor material has higher luminous efficiency and longer service life.

The present disclosure provides a dispersive optical device (DOD) that includes a first material having a first refractive index (n1) at a first wavelength (W1) and a first chromatic dispersion (D1); and at least one dispersive optical element (DOE) optically coupled in the first material, the at least one DOE comprising a second material containing a chromophore. The at least one DOE has a second refractive index (n2) at W1; a ratio of n2 to n1 is less than or equal to about 1.05; and the at least one DOE has a second chromatic dispersion (D2), wherein D2 is at least 10 times greater than D1.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores containing 3-aminocyclohex-2-en-l-one based donor groups, including (2) compositions / materials / resistive layers comprising NLO chromophores containing 3-aminocyclohex-2- en-l-one based donor groups, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores containing 3-aminocyclohex-2-en-l-one based donor groups (e.g., methods of drying and / or poling, and the like), (3) uses of NLO chromophores containing 3-aminocyclohex-2-en-l-one based donor groups in electro-optic devices (e.g., EOMs). The nonlinear optical (NLO) chromophores have the following formula (II):

Silk photoclick tattoo inks include modified silk nanoparticles including modified silk fibroin functionalized with a plurality of first photoclick chemistry pair moieties, wherein the modified silk nanoparticles are biocompatible and bioresorbable; and photoclick chromophores including a second photoclick chemistry pair moiety, wherein the first photoclick chemistry pair moiety and the second photoclick chemistry pair moiety undergo a known photoreaction when illuminated with light having a predetermined wavelength for a predetermined exposure length and a predetermined exposure intensity, thereby covalently bonding at least a portion of the photoclick chromophores to at least a portion of the modified silk nanoparticles, wherein the silk photoclick tattoo ink is safe for human use as a tattoo ink.

A chromophore having a down-conversion capability, an encapsulant film, glass, and a photovoltaic module. The chromophore has a structural formula as shown in formula (I-1) and / or formula (I-2), wherein n is any integer from 0 to 100; E0 comprises any one of an alkynyl group, an alkenyl group, a silyl, a silaphenyl group, and a silenyl group; Ex is selected from a group consisting of an optionally substituted silyl group, a silicon-containing heterocyclic group, a silicon-containing benzofused cyclic group, an alkenyl group, a heteroalkyl group, an aryl group, a heteroaryl group, an amino group, an acylamino group, a cyclic acylamino group, a cyclic imide group, an alkoxy group, a carboxyl group, and a carbonyl group; E2 is selected from a group consisting of an optionally substituted silylene, silenylene, an alkylene group, an alkenylene group, an oxy group, a silicon-containing arylene group, a heteroarylene group, carbonyl, and ester; Gx is independently selected from a group consisting of an optionally substituted alkylene group, a silylene group, an optionally substituted silicon-containing alkenylene group, a silicon-containing alkynylene group, an alkenylene group, an optionally substituted alkynylene group, an optionally substituted arylene group, and an optionally substituted silicon-containing arylene group; and A1, and A2 are each independently selected from a substituted aryl group and a substituted heteroaryl group; or A1 and A2 are each independently selected from a substituted silicon-containing heterocyclic group, a silicon-containing benzofused cyclic group, and an optionally substituted silyl group.

This invention discloses a method for determining the concentration of sulfated glycosaminoglycans using fluorescence spectroscopy. The fluorescent probe carries a certain number of arginine residues. Utilizing the electrostatic interaction between the amino groups on the arginine residues and the sulfate ions on the sugar chains, a series of fluorescent probe molecules can align neatly along the sugar chains to form a stable fluorescent complex. Due to the small spatial distance between the fluorescent chromophores in the complex, the original fluorescence emission band shifts. By calculating the ratio of the fluorescence intensities at two points, the concentration of sulfated glycosaminoglycans can be determined. This invention provides accurate detection results, good reproducibility, and high sensitivity; the experimental materials are simple, saving a significant amount of time.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores, including (2) compositions / materials / resistive layers comprising NLO chromophores, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores (e.g., methods of poling and / or drying, and the like), (3) uses of NLO chromophores in electro-optic devices (e.g., electro-optic modulators (EOMs)). NLO chromophores disclosed herein not only have large EO effect, but also have fast modulation speed. In addition, NLO chromophores disclosed herein have superior increased r33, photostability and thermal stability compared to other EO Materials. As a consequence, NLO chromophores herein are particularly suited for use as EO materials in connection with low power and small footprint devices, including devices used in data acquisition systems, analog I / O modules, field transmitters, lab and field instrumentation, servo drive control modules, direct current (DC) power supply, alternating current (AC), and / or electronic load.

The application belongs to the technical field of dye chemistry, and provides a double-chromophore reactive dye, a preparation method and application thereof, the double-chromophore reactive dye comprises an azo chromophore formed by diazo coupling, an indigo chromophore provided by an observation blue structure, and the two are connected through a triazine group. The double-chromophore reactive dye is deep in color, good in solubility, and excellent in dyeing fastness, and is suitable for dyeing of cellulose, silk, wool and other fabrics.

Nonlinear optical chromophore compositions which display lyotropic nematic liquid crystal phases in polar organic solvents and provide a mechanical anisotropic effect allowing for the formation of a non-centrosymmetric chromophore-polymer matrix without the application of an electric field.

Providing a method for testing the efficacy of andexanet. [Solution] This disclosure relates to a kit and method for measuring the potency of an andexanet sample in neutralizing a factor Xa inhibitor and restoring the activity of wild-type factor Xa. This disclosure provides a method for determining the activity of an andexanet sample, comprising: mixing a test sample containing an andexanet with a mixture containing human factor Xa (HFXa) and a direct factor Xa (fXa) inhibitor, wherein the molar ratio of FXa to Xa inhibitor is 0.2:1 to 0.3:1; adding a chromogenic fXa substrate to the mixture, wherein the chromogenic fXa substrate can release a chromophore upon reaction with HFXa; detecting the amount of chromophore released; and calculating the activity of the andexanet sample in releasing HFXa from a direct fXa inhibitor from the amount of chromophore released.

A xanthene derivative of formula I or of formula II, which may be useful as a chromophore, as a free-radical generator, or as an adhesion promoter and / or coupling agent. A mixture including the xanthene derivative of formula I or of formula II. A process for preparing the xanthene derivative process involving reacting a compound of formula (III) with a compound of formula (IVa) or (IVb), in the presence of a Lewis acid. A process for preparing the mixture including the xanthene derivative of formula I or of formula II.

The invention provides a detection method of a blood sugar reducing active component TrpCA of casei paracasei Lc19, which comprises the following steps: S1, pretreating a to-be-detected sample by using a methanol aqueous solution to obtain a detection solution; s2, the detection solution is analyzed through a high performance liquid chromatography-fluorescence detector, the TrpCA content is determined, and an impurity trapping small column is additionally arranged between a gradient mixer and a sample injector in the high performance liquid chromatography-fluorescence detector. According to the application, the TrpCA with sodium mole per liter of grade can be accurately detected through the characteristic fluorescence of an indole ring by utilizing the structural characteristic (the TrpCA has an endogenous fluorescent chromophore-indole ring) of the TrpCA and optimizing detection steps and chromatographic conditions. The method disclosed by the invention has the advantages of high sensitivity, high accuracy, high selectivity, simplicity and convenience in operation, low cost and wide applicability.

The invention belongs to the technical field of biomedicine, and particularly relates to a responsive near-infrared first-zone fluorescent compound as well as a preparation method and application thereof. The compound mainly comprises a fluorescent probe of three functional modules including a fluorescent chromophore, a fibrosis specific enzyme response group and a quenching group, and on the basis, an active / passive targeting group of a targeted disease organ is introduced to form a more excellent fluorescent probe of four functional modules. The effect of the probe is verified in a time-varying progress experiment of a fibrosis disease model, and the probe not only has high specificity and sensitivity, but also has relatively good safety and biocompatibility; the near-infrared first-area fluorescent compound and pharmaceutically acceptable salts or solvates, enantiomers, diastereoisomers and tautomers thereof can be used for preparing fluorescent molecular probes, and diagnosis, intraoperative navigation treatment, tissue and organ function evaluation and the like can be more accurately carried out on diseases.

The present invention relates to a hair care composition comprising at least one hair care ingredient and at least one polymeric colorant. The present invention also relates to a method of coloring human head or facial hair comprising the steps of: (a) providing a hair care composition comprising at least one poly(alkylene oxide)-substituted chromophore colorant; (b) applying the hair care composition to the hair; and (c) allowing the hair care composition to contact the hair for a period of time.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores, including (2) compositions / materials / resistive layers comprising NLO chromophores, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores (e.g., methods of poling and / or drying, and the like), (3) uses of NLO chromophores in electro-optic devices (e.g., electro-optic modulators (EOMs)). NLO chromophores disclosed herein not only have large EO effect, but also have fast modulation speed. In addition, NLO chromophores disclosed herein have superior refractive index, photostability and thermal stability compared to other EO Materials. As a consequence, NLO chromophores herein are particularly suited for use as EO materials in connection with low power and small footprint devices, including devices used in data acquisition systems, analog I / O modules, field transmitters, lab and field instrumentation, servo drive control modules, direct current (DC) power supply, alternating current (AC), and / or electronic load.

Nonlinear optical chromophores are provided that have a short chain bridging group between donor and acceptor, which chromophores exhibit lowered λmax values and narrow absorption bands. Electro-optic films prepared from nonlinear optical chromophores provided have enhanced transparency to wavelengths outside of the narrow absorption bands, as well as low optic loss, high thermal stability, and high photostability.