45 results about "Photoisomerization" patented technology

The invention relates to the technical field of biological materials, in particular to a pillararene-based photoresponse MOF-based ion gating nanochannel and a preparation method thereof. According to the pillararene-based photoresponse MOF-based ion gating nano-channel, a bullet-shaped nano-channel is prepared by taking PET (Polyethylene Terephthalate) as a substrate, and the substrate can provide structural support; p5A-MOF-1 based on pillararene is used as a core functional layer, and the core functional layer can provide a stable cavity environment; a P5A-MOF-1 cavity is filled with an organic aromatic azo compound, so that the light response structure change is realized. And the effective volume of the P5A-MOF-1 cavity is regulated and controlled through the photoisomerization effect of the azo group, so that precise gating of ion transmission is achieved. The preparation method provided by the invention is simple and convenient to operate, mild and controllable in condition and beneficial to large-scale production.

This invention provides a highly thermally stable, photoresponsive α-diimine nickel complex, its synthesis method, and its applications, aiming to develop novel olefin polymerization catalysts with both excellent thermal stability and photoresponsive properties. The core photoresponsive switch of this type of nickel complex is a rigid diphenylethylene derivative, which can achieve reversible photoisomerization of the E / Z configuration under 365 nm and 405 nm ultraviolet light irradiation: the E configuration has a relatively open coordination environment; after light irradiation, the Z configuration has a more compact spatial structure, which can form a dual regulatory mechanism: steric hindrance and potential metal-aryl π interactions. Due to this dual regulatory mechanism, the complex exhibits excellent thermal stability at 150 °C. o Even at high temperatures, it still maintains a high value of 0.8 × 10⁻⁶. 6 g·mol ‑1 ·h ‑1 The nickel complex of this invention exhibits enhanced catalytic activity and effectively inhibits chain transfer and chain walking reactions during high-temperature polymerization. By synergistically enhancing thermal stability through configurational tautomerism, and possessing both photoresponsive properties and high catalytic activity, it holds significant research value and broad application prospects in the precise synthesis of functionalized polyolefin materials.

The invention discloses a series of photoinduced isocompounds based on an alpha-cyano diarylethene skeleton as well as a preparation method and a metal ion regulation mechanism of the photoinduced isocompounds. The photoinduced isomeric compound is prepared through Knoevenagel condensation reaction by taking alpha-cyano diarylethene as a basic skeleton structure, the structural general formula of the photoinduced isomeric compound is shown in the specification, and the photoinduced isomeric compound is named as a hydroxyl-containing alpha-cyano diarylethene aromatic derivative. The photoinduced isomerization compound disclosed by the invention has good polarity sensitivity and photoinduced isomerization capability, and Z / E isomerization can be realized under the irradiation of ultraviolet light. The addition of metal ions is not a fluorescent response trigger factor, but can effectively adjust the photoresponse degree and rate of the photoinduced isocompound. The synthesis method of the photoisomerization compound is simple, the product is easy to purify, the optical property caused by photoisomerization can be regulated and controlled through coordination of polarity and metal ions, and an effective strategy is provided for designing a high-performance optical function material and application thereof.

The invention belongs to the field of new materials, and particularly relates to a benzoxazine phenoxazine modified dithienyl ethylene derivative as well as a preparation method and application of the benzoxazine phenoxazine modified dithienyl ethylene derivative. The invention provides a full visible light regulated benzoxazine phenoxazine conjugate modified dithienyl ethylene molecular switch, the photochromic degree of the molecular switch is the same as the effect under ultraviolet irradiation when the molecular switch drives a ring-closing reaction through visible light, and the molecular switch has high visible light responsiveness and light isomerization conversion rate.

The invention discloses a photoisomerization method of carotenoid, which comprises the following steps: dispersing high cis carotenoid in an organic solvent, carrying out photoisomerization in an illumination kettle until the proportion of all-trans carotenoid is not obviously increased, cooling, crystallizing, and filtering to obtain carotenoid solid with high all-trans proportion, and the filtrate sleeve is used as a solvent for next batch of isomerization. The isomerization method has the characteristics of mild conditions, high efficiency, controllability, cleanness and the like, accords with green chemistry and sustainable development concepts, and is simple in isomerization extraction operation, high in extraction yield and suitable for large-scale implementation.

The invention belongs to the technical field of organic electronics, and discloses a preparation method of an indanone-based photoresponse organic molecule and application of the indanone-based photoresponse organic molecule in the field of organic single-molecule wires. The indanone-based photo-responsive organic molecule has a structure shown as I-II as shown in the specification, and through-bond coupling (TBC) and through-space coupling (TSC) channels of the indanone-based photo-responsive organic molecule can be regulated and controlled through molecular structure engineering. By means of introducing electron donating / withdrawing groups into molecules, adjusting the length of a pi-conjugated chain, introducing steric hindrance and the like, the molecules are subjected to reversible photoisomerization under ultraviolet irradiation, and meanwhile, adjustment of a charge transfer channel can be realized at a single molecule level. The preparation method is simple and applicable, and has a good application prospect in the field of organic monomolecular wires.

The application relates to an electrowetting pixel unit, a display panel and a control method, the electrowetting pixel unit comprising a first cavity, the first cavity being filled with an electrolyte solution and translucent ink; a transparent insulating layer having a hollow second cavity, the second cavity being filled with a photoisomerization particle solution; the photoisomerization particle solution can change color under irradiation of light of a preset wavelength, and the translucent ink can prevent light of the preset wavelength in an external light source from passing through when spreading on a hydrophobic film layer. The electrowetting pixel unit provided by the application is filled with the photoisomerization particle solution in the second cavity, the photoisomerization particle itself has color, and can change color under irradiation of light of a preset wavelength, so that the richness of color display can be improved, the translucent ink can prevent light of the preset wavelength in an external light source from passing through when spreading on the hydrophobic film layer, and the reliability of the electrowetting pixel unit in improving the richness of color display through the photoisomerization particle solution can be ensured.

The invention relates to a synthetic method of didrogesterone. According to the method, progesterone is subjected to ketalation, halogenation, elimination, illumination isomerization, deprotection and final isomerization, and the didrogesterone is obtained. The method has the advantages of high yield, cheap and easily available raw materials, green and safe whole process route, high bulk drug quality and purity of 99.8% or more, and is suitable for industrial production.

The invention belongs to the technical field of solar-blind ultraviolet light detection materials, and relates to a full-flexible solar-blind ultraviolet light detection material and a preparation method and application thereof, and the full-flexible solar-blind ultraviolet light detection material comprises a down-conversion luminescent material, an azobenzene polymer and a piezoelectric polymer. The excitation-emission characteristic of the rare earth doped down-conversion particles is utilized, a light absorption window of azobenzene elements and the wavelength conversion characteristic of the down-conversion light-emitting particles are accurately matched, high-energy solar-blind ultraviolet light is converted into low-energy long-wave ultraviolet light capable of enabling azobenzene molecules to generate photoisomerization, an azobenzene polymer is driven to generate photoisomerization, and the light-emitting efficiency of the azobenzene polymer is improved. The film fiber network is driven to microscopically shrink and the piezoelectric polymer is excited to output an electric signal; the operation is simple and convenient, the fiber film composite material with a microstructure can be continuously manufactured in a large area, and the preparation of the large-area, fast-response and high-stability intrinsic flexible solar-blind ultraviolet detection material and the device thereof is realized.

The application provides a kind of light regulated liquid crystal material composition and its preparation method, belongs to light regulated liquid crystal technical field, preparation method includes with docosyl-tetramethyl piperidinol propylene acid ester, (3-acryloyloxy-2-hydroxy propoxy propyl) end-capped polydimethylsiloxane, cyano biphenyl hexyl acrylate and other raw materials preparation adjuvant, nematic liquid crystal monomer, photoisomerization functional monomer, dynamic covalent crosslinking agent, photoinitiator and the mixed liquid consisting of cyclohexanone and propylene glycol methyl ether acetate are under the condition of controlled temperature, rotation speed and vacuum degree, low-speed stirring, high-speed shearing dispersion and vacuum degassing curing are carried out, to obtain light regulated liquid crystal material composition, the application is through the adjuvant design and the one-step method mixing process of simplification, the contradiction between material dynamic response performance and long-term stability is solved, the prepared composition shows millisecond level fast light response, high optical contrast, photo-induced deformation and good cycle durability after film curing.

The invention relates to the technical field of compound synthesis, in particular to (Z)-p-toluenesulfonyl hydrazone derivatives and a preparation method thereof. The (E)-p-toluenesulfonyl hydrazone derivative, a photosensitizer and a solvent are mixed and react under illumination to obtain the (Z)-p-toluenesulfonyl hydrazone derivative. The photosensitizer selected by the method is green and low in cost, free of heavy metal residues, wide in substrate application range, high in isomerization efficiency, short in reaction time and good in cis-product stability, the system is easy for amplified production, the high-purity hydrazone compound and the photoisomerization product thereof can be efficiently, mildly and greenly prepared, and the method is suitable for industrial production. The application potential in the fields of drug synthesis, precise drug delivery and functional materials is obviously improved.

The application belongs to the technical field of fluorescent analysis and detection, and particularly relates to a tridentate Schiff base compound and a preparation method and application thereof. 2 The formylhydrazine Schiff base compound is widely applied in coordination chemistry, and a parent structure thereof can be used to better study the transformation of a complex under light stimulation, and the imino group also has good photoisomerization performance, at this time, the light stimulation can catalyze the ligand to produce more rich coordination modes, so the isomerization phenomenon of the compound under the action of ultraviolet light is tested, and the application of the compound in a colorimetric chemical sensor is studied. Further research is conducted on whether the compound has different ion selectivity after the conversion configuration under the action of ultraviolet light and the change of the coordination mode, and finally, the complex of the ligand Ni 2+ , Cu 2+ metal is synthesized.

A fiber having a polymer sheath and a core. The core has a liquid crystal and a compound capable of photoisomerization, such as that shown below. A method of: providing a first solution of a polymer, providing a second solution of a liquid crystal and compound capable of photoisomerization, and electrospinning the first solution and the second solution to form the fiber.

The present invention provides a means which is capable of suppressing a decrease in transparency in a transparent state under high temperature conditions in a liquid crystal light control element in which light scattering properties are increased by receiving ultraviolet light and the light scattering properties are decreased by receiving visible light. The present disclosure relates to a liquid crystal light control element that comprises: a pair of transparent substrates which each have a transparent electrode and an alignment function layer that is disposed on one surface of the transparent electrode, and which are arranged so that the alignment function layers face each other; and a liquid crystal layer which contains liquid crystal molecules, a photoisomerization material, a non-photoresponsive chiral compound, and a polymer of a photopolymerizable monomer, and which is interposed between the pair of transparent substrates. The light scattering properties of the liquid crystal light control element are increased by receiving ultraviolet light, and the light scattering properties are decreased by receiving visible light. The liquid crystal light control element is characterized in that the average diameter of voids contained in the polymer of the photopolymerizable monomer in a cross section in the plane direction of the liquid crystal layer is smaller than the theoretical value of the helical pitch of the liquid crystal molecules caused by a temperature change from 27°C to 70°C of the helical twisting power (HTP) of the non-photoresponsive chiral compound.

The present invention provides a light-controlled electromechanical material and its preparation method and application, belonging to the field of smart material technology. In the light-controlled electromechanical material prepared by the present invention, spiropyran undergoes a photoisomerization reaction under ultraviolet light irradiation to form a closed-ring spiropyran structure and an open-ring cyanine structure. The two isomeric forms undergo mutual transformation under the conditions of ultraviolet light irradiation of two different wavelengths, and the Young's modulus and strain change, thus having a photoinduced shape memory effect; while the PVDF-based material generates an electrical output when the strain changes, thus having a photoelectric effect; therefore, the present invention combines the photoinduced shape memory property with the piezoelectric property. The prepared light-controlled piezoelectric material not only has a photoinduced shape memory effect, but also has a photoelectric effect. It can be used as both an actuator and a sensor, combining the functions of an actuator and a sensor, overcoming the shortcomings of single-function smart materials.

The application discloses a kind of nano-drugs with low oxygen response and photoisomerization function and preparation and application, belong to the field of biomedicine technology.The present application uses 4,4'-dichloro azobenzene as low oxygen response unit, which is covalently linked with 10-hydroxy camptothecin and drug carrier mPEG to form size-controllable nano-drugs, which have suitable particle size, more conducive to the enrichment of drug circulation in tumor site and play curative effect, when the nano-drugs reach the low-oxygen tumor site, the azo reductase unique to low-oxygen environment will reduce the azo group inside the nano-drugs, resulting in the disintegration of the nano-drug structure, thereby releasing 10-hydroxy camptothecin to play the efficacy of chemotherapy, and reduce the toxic and side effects of drug on normal tissues;In addition, the nano-drug has high utilization rate and good biocompatibility, so it has good application prospect in the preparation of antitumor drugs.

This invention discloses a process and active carrier catalyst for the catalytic synthesis of acetyl empagliflozin. The process utilizes a yeast cell wall-mediated active carrier nickel-phosphorus composite catalyst. The catalyst is activated in a water / glycerol mixed solvent via microwave-ultrasound dual-field synergistic activation, catalyzing the reaction of compound 5 with compound 4 to obtain compound 3. In a supercritical CO2 / ionic liquid system, leveraging the photoisomerization properties of spiropyran-quaternary ammonium iodide, under low-voltage electrocatalysis and UV-Vis switching conditions, the directional glycosylation reaction of compound 3 with compound 2 is achieved to obtain compound 1. This invention utilizes the porous structure and functional groups of the yeast cell wall to stabilize nano-nickel-phosphorus particles, improving catalytic efficiency and reusability. Through the synergistic guiding effect of photoresponsive molecules and ionic liquids, high selectivity of the reaction is achieved. The entire process uses green solvents, and a closed-loop catalyst recovery process is established, offering advantages such as environmental friendliness, low cost, and high product purity.

The purpose of the present invention is to improve a response speed from a transparent state to a screen state in a liquid crystal dimming element in which light scattering is increased by receiving ultraviolet light and light scattering is reduced by receiving visible light.　A liquid crystal dimming element according to the present invention comprises: a pair of transparent substrates that each have a transparent electrode and an alignment function layer disposed on one surface of the transparent electrode, and that are disposed such that the alignment function layers face each other; and a liquid crystal layer that includes liquid crystal molecules, a photoresponsive material containing a photoisomerization material, and a polymer of a photopolymerizable monomer, and that is interposed between the pair of transparent substrates, wherein light scattering is increased by receiving ultraviolet light and light scattering is reduced by receiving visible light. The liquid crystal dimming element is characterized in that an angle ϴ [°], formed by an axial direction of an orientation force in which the alignment functional layer acts on the liquid crystal molecules and an axial direction of an orientation force in which the polymer of the photopolymerizable monomer acts on the liquid crystal molecules, satisfies 0<ϴ≤90.

The invention relates to biological application of binary system triplet-triplet annihilation up-conversion luminescence in Schiff base controllable photoisomerization based on a sleeve device, a binary up-conversion system is constructed through regulation and control of a photosensitizer and an annihilation agent, near-infrared light or long-wavelength visible light is converted into short-wavelength blue light, Trans-to-Cis isomerization of Schiff base is triggered, and reactive oxygen species are synchronously generated. An inner-outer double-layer sleeve closable structure is innovatively adopted, accurate regulation and control of the photosensitizer-annihilation agent proportion and independent separation of a substrate are achieved, the technology breaks through the biological penetration limitation of a short-wavelength light source, and a novel light-activated prodrug release strategy is provided for tumor targeted therapy.

The present application relates to the technical field of biological materials, and particularly relates to a pillar arene-based photoresponsive MOF-based ion gate nano-channel and a preparation method thereof. The pillar arene-based photoresponsive MOF-based ion gate nano-channel is prepared by taking PET as a substrate to prepare a bullet-shaped nano-channel, the substrate can provide structural support; taking a pillar arene-based P5A-MOF-1 as a core functional layer, the functional layer can provide a stable cavity environment; filling an organic aromatic azo compound in the cavity of the P5A-MOF-1 to realize a photoresponsive structural change. The effective volume of the cavity of the P5A-MOF-1 is regulated through photoisomerization of the azo group, and then precise gating of ion transmission is achieved. The preparation method is simple in operation, mild and controllable in conditions, and is conducive to large-scale production.

The utility model discloses a device for measuring photoinduced isomerization molecule capacitance, which comprises a main body structure, a capacitance pool and a cover, the cover is provided with a probe and is connected with an external lead, a groove is arranged in the main body structure, the capacitance pool is accommodated in the groove, the capacitance pool is used for accommodating a sample solution containing photoinduced isomerization molecules to be measured, and the probe is arranged in the groove. The cover which is provided with the probe and is connected with the external lead is used for sealing the groove and measuring the capacitance of the sample solution; a groove is formed in the bottom of the capacitance pool, a through hole is formed in the bottom of the groove, a light-transmitting area is arranged at the bottom of the capacitance pool, the position of the through hole corresponds to that of the light-transmitting area, and the through hole is used for enabling light of an external light source to penetrate through the light-transmitting area to irradiate the sample solution in the capacitance pool. According to the utility model, solution capacitance change caused by molecular isomerization before and after illumination can be accurately captured.

The application relates to the technical field of nanomaterials, in particular to a method for preparing a photoisomerization film by using LB film technology. The method comprises the following steps: molecular selection, a preparation method, condition parameters and an experimental method, etc. The method uses the LB film technology, takes azobenzene glutamine amphiphilic molecules as a main body, dissolves the amphiphilic molecules L-GAZS in N,N-dimethylformamide to prepare an organic dispersion liquid with a concentration of 0.5-1.5 mmol / L, selects rhodamine B, saffron T and methylene blue as subphases, and prepares a thin film with photoisomerization through the LB technology. The method has the advantages of simple equipment and preparation method, easy operation, mild and easy-to-control reaction conditions, good stability of the composite film prepared by the LB technology, material saving and recyclability, and the like. The orientation degree of the LB film and the application thereof can be controlled by changing the types of the amphiphilic organic molecules, the number of the LB film layers and other conditions.

The application discloses a DASAs molecular optical switch capable of realizing solid thin film isomerization and a synthesis method and application thereof. Z ,4 E )-5-(benzyl((4-methylpyridin-2-yl)methyl)amino)-2-hydroxypenta-2,4-dien-1-ylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione is synthesized by reacting 4-methylpyridine-2-carboxaldehyde and benzylamine and then reducing by sodium borohydride N -benzyl-1-(4-methylpyridin-2-yl)methylamine, and then reacting with 5-(furan-2-ylmethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione in methanol. The DASAs molecular optical switch has a quick and reversible isomerization response to visible light, and exhibits a significant selective color response to metal ions, and in addition, the molecular optical switch can realize reversible photochromism in a polymer substrate in a solid state. More importantly, a pure phase solid thin film prepared from the molecular optical switch can realize photoisomerization, and has great application potential in the fields of optical information storage and information permanent encryption, metal ion detectors and the like.

The invention discloses an environment-adaptive camouflage material and a preparation method thereof. The material comprises a five-layer composite structure of a photoisomerization layer, a temperature-sensitive color-changing layer, an electro-deformation layer, a substrate layer and a bonding layer, and through the synergistic effect of triple mechanisms of spiropyrane photoisomerization, temperature-sensitive polymer phase change and dielectric elastomer deformation, the visible light reflectivity can be continuously adjusted by 15-85%, and the infrared emissivity can be dynamically adjusted and controlled (delta epsilon gt, 0.4). The preparation method comprises the processes of spin coating and curing, in-situ polymerization and plasma bonding. The material keeps quick response (less than 5s) in an environment of-30 to 60 DEG C, and is suitable for multi-spectrum dynamic camouflage of outdoor facilities.

Disclosed herein is a fiber having a sheath including a polymer and a core including a non-cholesteric liquid crystal. The sheath is transparent to visible light. The fiber may an average diameter of no more than 10 microns, and at least 90% of the fiber has a diameter within 20% of the average diameter. The sheath may include a compound capable of photoisomerization that extends into the core. The interference color of the fiber may be reversibly changed by exposure to light or a temperature change.

This invention belongs to the field of new materials technology, and more specifically, relates to an alkoxytriphenylamine conjugated modified dithienylethylene derivative and its applications. The dithienylethylene derivative has structural units as shown in formula (I): wherein R1O and R2O are each independently a C1-C4 alkoxy group, and Ar is a C6-C4 alkoxy group. 14 The aryl group. The alkoxytriphenylamine-modified dithienylethylene molecular switch designed in this invention has an absorption wavelength red-shifted to the visible light region, so that the ring-closing reaction can be driven by visible light, while the ring-opening reaction itself is driven by long-wavelength visible light. This achieves full visible light control of the dithienylethylene molecular switch and has strong and efficient visible light responsiveness and remarkable photoisomerization conversion rate.

The invention relates to the technical field of solar energy utilization and molecular energy storage materials, in particular to a norbornadiene derivative solid-state photo-thermal energy storage film based on a photo-isomerization effect and a preparation method and application of the norbornadiene derivative solid-state photo-thermal energy storage film. The invention relates to a norbornadiene derivative solid-state photo-thermal energy storage film based on a photo-isomerization effect. The norbornadiene derivative solid-state photo-thermal energy storage film is prepared by blending a derivative of a photo-responsive NBD molecule and a polystyrene (PS) polymer matrix in tetrahydrofuran (THF) through spin coating and drying processes. Under illumination, NBD molecules are subjected to photoisomerization reaction, solar energy is absorbed and stored in the form of chemical energy, and the stored energy can be released in the form of heat energy under thermal excitation. The solid-state energy storage film provided by the invention effectively solves the problems of leakage and poor thermal stability of a traditional liquid molecular solar thermal energy storage MOST system, has good integration and environmental adaptability, is perfectly compatible with an existing photovoltaic PV module, is simple to prepare and stable in performance, and has wide application prospects and popularization values.

This invention discloses a photo-switching organoiridium metal complex, its preparation method, and its applications, belonging to the field of photoisomerization materials technology. This invention involves forming an N^N ligand through a Sonogashira coupling reaction between alkynyl spiropyran and phenanthroline, and finally coordinating with a bridging ligand to form a photo-switching organoiridium metal complex. This photo-switching iridium metal material combines nonlinear optical materials with photoisomerizing spiropyran molecules, exhibiting excellent optical limiting performance, good photothermal stability, photoisomerization characteristics, fatigue resistance, bleaching resistance, and excellent laser protection performance. Furthermore, after ultraviolet irradiation, the expansion of the complex's conjugation degree due to the ring-opening of the spiropyran molecule further enhances its laser protection performance.

Highly reversible supramolecular photoswitching system with macrocycle-mediated photoinduced emission enhancement, preparation and application in targeted cell imaging and anti-counterfeiting. A supramolecular photoswitching system self-assembly with photo-induced crystallization, emission enhancement and assembly-activated emission enhancement photoactivation mechanism was developed using supramolecular assembly, and further assembled with HACD. Due to the reversible photoisomerization characteristics and efficient AIE characteristics of DAE units, the luminescence of DAE-CO can be reversibly turned on / off. Under the stimulation of light, DAE-CO tends to self-aggregate into larger aggregates with emission enhancement characteristics, and this enhancement can be gradually increased by alternating irradiation in several UV / NIR cycles. Like DAE-CO, and both have the characteristics of luminescence adjustment and photo-induced aggregation emission enhancement. In addition, we have applied these supramolecular luminescent materials to information encryption and targeted, light-controlled tumor cell imaging.

A diastereomer preparation method that produces a desired diastereomer from a diastereomer mixture with high efficiency; and a solid-phase photosensitizer which is used in the method. In the method, one diastereomer among cis-trans isomers is selectively prepared utilizing recycle HPLC. The method includes a step A that is a separation step for introducing a cis-trans isomer mixture into the separation column to selectively collect one diastereomer; a step B that is a photoisomerization reaction step for irradiating a solution containing the other diastereomer which is obtained after the step A or C with light in the presence of a photosensitizer in a photoisomerization reactor to induce a photoisomerization reaction; and a step C that is a step for introducing a cis-trans isomer mixture produced in the step B into a separation column to selectively collect the one diastereomer.