22 results about "Bridging ligand" patented technology

The invention discloses a multi-emission composite nano ratiometric fluorescent probe for detecting fluoroquinolone antibiotics and a preparation method of the multi-emission composite nano ratiometric fluorescent probe. The CdTe-Tb-UMP composite nano ratiometric fluorescent probe with double ligands is prepared by taking metal terbium ions (Tb < 3 + >) as central ions and respectively taking uridine monophosphate (UMP) and CdTe quantum dots with red fluorescence emission as bridged ligands. ENR is further coordinated with Tb < 3 + >, energy is transferred to Tb < 3 + > through an antenna effect, so that characteristic green fluorescence of Tb < 3 + > is turned on, and fluorescence of CdTe quantum dots is almost kept unchanged. On the basis, a portable nursing point testing system is further constructed, and the portable nursing point testing system comprises an intelligent mobile phone detector and a wearable fingertip sensor integrated with a micro-fluidic chip and is used for on-site rapid detection of the ENR. The paper-based chip shows rapid and sensitive fluorescence response, and the detection limits of the spectrograph and the paper-based sensor on the ENR are 4.7 nM and 13.1 nM respectively. The probe can be applied to detection of ENR in actual environment water samples, food and drugs.

The invention relates to the technical field of photoelectrocatalysis, in particular to a Co (II) coordination polymer photoelectrode crystalline material and a preparation method and application thereof. The Co (II) coordination polymer {[Co (H2O) (Br-BDC) (BMIP)]. H2O} n is obtained from organic ligands BMIP, H2 (Br-BDC) and cobalt salt through a solvothermal method, cobalt (II) ions serve as three connection nodes, BMIP and H2 (Br-BDC) ligands serve as bridging ligands to be in mutual bridging, a two-dimensional honeycomb structure is formed, and a three-dimensional supramolecular structure is formed between layers through intermolecular hydrogen-bond interaction and pi-pi stacking. Wherein H2 (Br-BDC) is 2, 5-dibromoterephthalic acid, BMIP is 1, 3-bis (dimethylimidazolyl) propane, and n is a positive integer. The Co (II) coordination polymer shows relatively good photoelectric property, has the potential of serving as a photoelectrode material, has good optical and electrical characteristics, can be used for constructing an efficient photoelectrocatalysis water decomposition system, and has an application prospect in the aspects of photoelectric hydrolysis water oxidation and the like.

The invention discloses a photosensitive nanocrystal material and a preparation method thereof, and belongs to the technical field of photoresist production processes. In order to solve the problems that an existing photoresist material is low in light absorption efficiency, insufficient in resolution ratio and complex in preparation, an Hf / Zr mixed metal alkoxide precursor is adopted, and the photoresist material is prepared through the steps of anhydrous hydrolysis, two-phase reaction, surface modification, photosensitive addition and the like. The method specifically comprises the following steps: (i) dropwise adding ultrapure water at a low temperature to react with a first ligand A to form 1.5-3nm metal oxide nanocrystalline sol; (ii) reacting alkali liquor in the two-phase system to grow crystals; (iii) carrying out surface modification on the bridged ligand B and the second ligand C; and (iv) adding a photoacid generator and a free radical photoinitiator, filtering with a filter membrane, and pre-drying to form the membrane. The material is suitable for a negative photoetching process, and the EUV absorption efficiency is gt; 85%, LWRlt; 2 nm. The method is simple to operate, and the yield is gt; the stability and the resolution ratio of the material are remarkably improved, and the material is suitable for sub-10nm semiconductor photoetching.

The invention relates to the technical field of high polymer materials, and discloses a polymethyl methacrylate composition and a preparation method thereof, and the polymethyl methacrylate composition is prepared from the following raw materials in parts by weight: 100 parts of polymethyl methacrylate resin, 0.2-3.2 parts of a Lewis acid center provider, 0.2-3.2 parts of a multifunctional bridging ligand, and 0.1-1.1 parts of a competitive replacement aid. The preparation method comprises the step of carrying out melt blending on the components. According to the invention, through the synergistic effect of the Lewis acid center provider and the multifunctional bridging ligand, a dynamic reversible supramolecular network is constructed in a polymethyl methacrylate matrix, and the structure of the supramolecular network effectively improves the impact toughness, rigidity and thermal deformation temperature of the material. The technical problem that toughness, rigidity, heat resistance and processability of a traditional polymethyl methacrylate material are difficult to consider at the same time is solved, and the polymethyl methacrylate composition with excellent comprehensive performance is prepared.

The invention relates to the technical field of research and development of tumor photodynamic therapy photosensitizers, photothermal therapy photothermal reagents and sonodynamic therapy sonosensitizers, and provides a preparation method and application of a binuclear metal complex of a polythiophene bridging ligand. The invention relates to a ruthenium complex TBLRu3a-TBLRu6a and a ruthenium complex TBLRu3b-TBLRu6b of a polythiophene bridged tri-bidentate ligand, a ruthenium complex TTLRu1-TTLRu12 of a polythiophene bridged bis-tridentate ligand, and an osmium complex TTLOs1-TTLOs6 of a polythiophene bridged bis-tridentate ligand, which are respectively designed and invented by the invention. The invention further relates to a preparation method of the ruthenium complex TBLRu3a-TBLRu6a and the ruthenium complex TBLRu3b-TBLRu6b of the polythiophene bridged tri-bidentate ligand and a preparation method of the ruthenium complex TTLRu1-TTLRu12 of the polythiophene bridged bis-tridentate ligand. The polythiophene bridged metal complex has extremely high stability and excellent two-photon absorption characteristic, has excellent biotoxicity and photothermal conversion capability under the action of infrared exciting light, and can induce A549R cell apoptosis. The polythiophene bridged metal complex provided by the invention is a potential novel two-photon absorption photodynamic therapy photosensitizer, a photothermal therapy photothermal reagent and a sonodynamic therapy sonosensitizer, and has a wide application prospect in photodynamic therapy, photothermal therapy and sonodynamic therapy of tumors.

This application relates to the field of seawater electrolysis technology, and more particularly to a chlorine-resistant MOF anode material for seawater electrolysis and its preparation method. The chlorine-resistant MOF anode material comprises a porous conductive substrate and a metal-organic framework (MOF) catalyst layer grown in situ on the surface of the porous conductive substrate. The MOF catalyst layer includes a transition metal center and a ternary ligand system coordinated to the transition metal center. The ternary ligand system includes 2,5-thiophene dicarboxylic acid as a bridging ligand, and ferrocene carboxylic acid derivatives and pyridine carboxylic acid derivatives as non-bridging ligands. Through the synergistic co-assembly of the ternary ligands, a dense three-dimensional physical protective barrier is constructed on the surface of the catalyst material, enabling the catalyst to exhibit excellent stability in natural seawater media without any desalination or purification pretreatment. This reduces the stringent requirements on the quality of the reaction feed water and eliminates the need for complex seawater desalination pretreatment processes in industrial systems.

The invention relates to the technical field of photoelectrocatalysis, in particular to a Ni (II)-based coordination polymer photoelectrode crystalline material and a preparation method and application thereof. The Ni (II)-based coordination polymer {[Ni (H2O) (Br-BDC) (BMIP)]. H2O} n is obtained from organic ligands BMIP, H2 (Br-BDC) and nickel salt through a solvothermal method, nickel (II) ions serve as three connection nodes, BMIP and H2 (Br-BDC) ligands serve as bridging ligands to be in mutual bridging, a two-dimensional honeycomb structure is formed, and a three-dimensional supramolecular structure is formed between layers through intermolecular hydrogen-bond interaction and pi-pi stacking. Wherein H2 (Br-BDC) is 2, 5-dibromoterephthalic acid, BMIP is 1, 3-bis (dimethylimidazolyl) propane, and n is a positive integer. The Ni (II)-based coordination polymer shows relatively good photoelectric properties, has the potential of serving as a photoelectrode material, has good optical and electrical characteristics, can be used for constructing an efficient photoelectrocatalysis water decomposition system, and has application prospects in the aspects of photoelectric hydrolysis water oxidation and the like.

The invention discloses a method for preparing an indium oxide powder material, which comprises the following steps: with indium nitrate and 1, 4-naphthalic acid as reaction raw materials, adding a surface modifier accounting for 0-20% of the total mass of the reaction raw materials into an organic solvent system to prepare an indium-based metal organic framework material; separating, washing and drying the indium-based metal organic framework material to obtain an indium-based metal organic framework precursor; and annealing the indium-based metal organic framework precursor to obtain the indium oxide powder material. According to the preparation method, 1, 4-NDC is selected as an organic bridging ligand, the concentration of the 1, 4-NDC and the dosage of a surface modifier are regulated and controlled, an In-MOF structure with a special morphology can be formed through induction, and the morphology can be kept intact through adjustment of the annealing temperature and parameters; the morphology controllability of the indium oxide particles allows crystal face exposure and charge transfer paths of the indium oxide particles to be customized, and the performance of the indium oxide particles in optoelectronic equipment, energy storage and photocatalysis is optimized.

The present application relates to a kind of manganese porphyrin metal organic framework material and its preparation method and application, its preparation method includes the following steps: manganese salt, porphyrin ligand, auxiliary regulator and organic solvent are mixed, solvent thermal reaction is carried out, and manganese porphyrin metal organic framework material is obtained;Auxiliary regulator includes polyvinylpyrrolidone, benzoic acid and pyrazine.The present application is by introducing auxiliary regulator, polyvinylpyrrolidone and pyrazine are the key to ensure yield and participate in framework structure formation, it is as structure directing agent and auxiliary bridging ligand and participates in the formation process of framework structure, any component is missing cannot obtain target manganese porphyrin metal organic framework material;Benzoic acid promotes the formation of coordination bond by adjusting the local acid-base environment of reaction system, is the key to promote manganese ion center coordination;Three synergistically build manganese porphyrin metal organic framework material with high proportion of manganese ion center coordination, effectively promote the use of visible light, and then improve its photocatalytic performance.

The invention discloses a bimetallic heteronuclear complex as well as a preparation method and application thereof, and relates to the technical field of environmental catalytic materials and preparation. The complex is prepared by adopting a two-step method of'pre-complexing first and bridging later ', under the protection of inert gas, two metal precursors and a terminal ligand are respectively subjected to primary coordination and premixing under an acidic condition, then a bridging ligand is added, a bridging reaction is completed in a weak alkaline environment, and a product is obtained through precipitation and drying. And ball-milling and mixing the complex and a carrier, and then carrying out heat treatment to prepare the bimetallic supported catalyst. The catalyst plays a synergistic effect by constructing atomic-scale dispersed bimetallic active sites, shows a wide active temperature window, high activity and selectivity in denitration, N2O decomposition and CO catalytic oxidation reaction, has excellent sulfur resistance and hydrothermal aging resistance, is suitable for various carriers and reactions, is controllable in cost, and provides a new path for purification of atmospheric pollutants.

This invention belongs to the field of catalyst preparation and application technology, and discloses a method for preparing sulfur-bridged bimetallic alkyne complexes and their application in the dehydrogenation coupling synthesis of 1,4-diyne. The method uses thiols or thiophenol salts as bridging ligands, with each metal center coordinated with a cyclopentadienyl group or a substituted cyclopentadienyl group. This invention achieves coordination activation of the terminal alkyne by controlling the oxidation state of the metal center and altering the bonding mode of the terminal alkyne at the metal center. In this system, the sulfur-bridged ligand not only assists the metal center in activating the terminal alkyne but also stabilizes a key intermediate in the catalytic process. Subsequently, the coordinated-activated terminal alkyne undergoes a reductive elimination process to generate 1,4-diyne. This reaction can be carried out in a temperature range of -100℃ to 25℃, with a reaction time of 0.5 to 48 hours. This method can synthesize a series of novel sulfur-bridged bimetallic alkyne complexes with high yield and high selectivity, providing a novel catalytic system for the activation of C-H bonds in terminal alkynes mediated by inexpensive metals and the further synthesis of 1,4-diyne.

The invention belongs to the technical field of preparation of metal complexes, and discloses a sulfur / carbon ligand bridged bimetallic complex, a preparation method thereof and an application of the sulfur / carbon ligand bridged bimetallic complex in dehalogenation conversion of chlorine / brominated alkane into corresponding alkane or olefin, thiophenol is used as a bridged ligand, and each metal center is coordinated with cyclopentadienyl or substituted cyclopentadienyl. And reacting the double halogen atom bridged bimetallic complex with thiophenol dilithium salt to obtain the sulfur / carbon ligand bridged bimetallic complex. The sulfur / carbon ligand bridged bimetallic complex provided by the invention can be used for dehalogenation conversion reaction of chlorine / brominated alkane under specific reaction conditions to obtain corresponding alkane or olefin, the reaction temperature is-78 to 40 DEG C, and the reaction time is 0.5 to 48 hours. According to the method, the reaction conditions are easy to control, the reaction temperature range is wide, the corresponding alkane or olefin and sulfur-bridged bimetallic dihalogen atom complex can be obtained, a new effective way is provided for resource utilization of chloro / brominated alkane, and the method has wide application prospects in the fields of organic synthesis, environmental governance and the like.

This invention discloses a method for preparing a tetranuclear supramolecular macrocycle containing a semi-sandwich ruthenium structure and its application in antibacterial applications, belonging to the field of antibacterial pharmaceutical technology. The method for preparing the tetranuclear supramolecular macrocycle includes: mixing silver trifluoromethanesulfonate with a methanol solution, filtering, adding two ligands and NaOH to the filtrate, and purifying to obtain the complex. The tetranuclear ruthenium supramolecular macrocyclic complex of this invention contains multiple positively charged ruthenium centers in its molecule, exhibiting a stronger multivalent effect, thereby effectively penetrating into the bacterial cell membrane and leading to bacterial death; it can form a novel antibacterial agent with low toxicity and excellent anti-biofilm activity; it solves the problems in existing technologies where the metal centers are mostly relatively highly toxic Pt(II) and Cu(II), and the rigid bridging ligands used lack biomimetic recognition ability with key bacterial biomolecules, limiting their antibacterial ability and selectivity.

This invention discloses a photosensitive nanocrystalline material and its preparation method, belonging to the field of photoresist manufacturing technology. To address the problems of low light absorption efficiency, insufficient resolution, and complex preparation of existing photoresist materials, this invention uses an Hf / Zr mixed metal alkoxide precursor and prepares it through steps including anhydrous hydrolysis, two-phase reaction, surface modification, and photosensitive addition. Specifically, it includes: (i) reacting ultrapure water with the first ligand A at low temperature to form a 1.5-3 nm metal oxide nanocrystalline sol; (ii) growing crystals through an alkaline reaction in the two-phase system; (iii) surface modification with bridging ligand B and the second ligand C; and (iv) adding a photoacid generator and a free radical photoinitiator, filtering with a filter membrane, and pre-baking to form a film. This material is suitable for negative lithography processes, with an EUV absorption efficiency >85% and an LWR <2 nm. The method of this invention is simple to operate, has a yield >85%, significantly improves material stability and resolution, and is suitable for sub-10 nm semiconductor lithography.

The present application relates to the development of a photosensitizer for photodynamic therapy of tumors, a sonosensitizer for sonodynamic therapy, and a photothermal reagent for photothermal therapy, and provides a bithiophene-benzene bridged ligand and a preparation method thereof, and a bithiophene-benzene bridged dinuclear metal complex and a preparation method and application thereof. The present application is based on a bithiophene-benzene bridged ligand dtdpip, and a bithiophene-benzene bridged dinuclear ruthenium complex, a bithiophene-benzene bridged dinuclear osmium complex and a bithiophene-benzene bridged dinuclear iridium complex are respectively designed and invented. The bithiophene-benzene bridged dinuclear metal complex has extremely high stability and excellent two-photon absorption characteristics, and has excellent biological toxicity and photothermal conversion capacity under the action of infrared excitation light and ultrasonic waves. The conjugated bithiophene dinuclear metal complex provided by the present application is a potential new type of infrared photodynamic photosensitizer, sonosensitizer and photothermal reagent, and has a broad application prospect in the photodynamic therapy, sonodynamic therapy and photothermal therapy of tumors.

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.

This invention belongs to the field of molecular-based functional materials and molecular electronic devices, specifically disclosing a coordination compound material based on an iron-cobalt bimetallic center, its preparation method, and its application. The chemical formula of the material is {[(pzTp)Fe Ⅲ (CN)3]2Co Ⅱ (3,4-bit)}·4CH3OH·2.5H2O, where pzTp is the tetra(1-pyrazolyl)borate ligand of the iron center, and 3,4-bit is the bidentate bridging ligand 3,4-bis(1-imidazolyl)thiophene. The material uses iron and cobalt ion centers as electron transfer pairs, and cyano (CN) groups as bridging groups to construct Fe–CN–Co coordination units. The coordination field strength, steric hindrance, and crystal stacking mode of the iron and cobalt metal centers are controlled by nitrogen-containing ligands. This invention develops a novel Fe–Co molecular device material that integrates electron transfer, spin-transformation, and multi-physics signal output in a single material. This material has outstanding advantages such as structural stability, reversible signal switching, and significant multi-stable-state coupling, and has broad application prospects in molecular information storage, multifunctional switches, and intelligent response materials.

The invention discloses a high-brightness phosphorescent binuclear Pd (II) complex as well as a preparation method and application thereof, and belongs to the technical field of organic photoelectric materials. The complex has a specific binuclear structural general formula, takes palladium as a metal center, adopts a carbene ligand of a strong sigma donor as a cyclometalated ligand, and selects 4-methyl oxazolidine-2-thioketone and a derivative thereof as bridging ligands. According to the preparation method, a first intermediate and a second intermediate are sequentially synthesized in a nitrogen atmosphere by adopting a one-pot method and finally react with a bridging ligand to obtain a target product, the process is simple and convenient, and intermediate separation is not needed. According to the present invention, through the synergistic effect of the carbene ligand and the bridging ligand, the metal-ligand and metal-metal-ligand charge transfer process is effectively enhanced, the phosphorescence efficiency is significantly improved, and the organic electroluminescent material has excellent thermal stability, and has wide application prospects in organic electroluminescent devices, particularly OLED light emitting layer materials.

The application discloses a cobalt-based porous chiral metal-organic framework enzyme-mimic material and a preparation method and application thereof, relates to the technical field of chiral science, and the material is formed by one-pot coordination assembly with chiral H4L as a bridging ligand, 4, 4'-dipyridyl as an auxiliary ligand and cobalt as a metal salt; the application also provides a cobalt-based porous chiral metal-organic framework enzyme-mimic material prepared by the method and application thereof. The cobalt-based porous chiral metal-organic framework with unique cubic cavities, narrow open channels and chiral recognition sites and the enzyme-mimic structure characteristics can be assembled by coordination of the chiral ligand H4L, 4, 4'-dipyridyl and cobalt ions; the preparation method is simple, the conditions are mild and controllable, the yield is high and the method is easy to repeat. The material can separate enantiomers of chiral secondary alcohols with excellent enantioselectivity, size selectivity, substrate universality and recycling.

The invention relates to the technical field of research and development of tumor photodynamic therapy photosensitizers, photothermal therapy photothermal reagents and sonodynamic therapy sonosensitizers, and provides two bithiazole bridging ligands and preparation methods thereof as well as binuclear metal complexes of the bithiazole bridging ligands as well as preparation methods and application of the binuclear metal complexes. According to the invention, a binuclear ruthenium complex, a binuclear osmium complex and a binuclear iridium complex are respectively designed and invented on the basis of bithiazole bridging ligands bpytztz and piptzpip. The two types of bithiazole bridged binuclear metal complexes have extremely high stability and excellent two-photon absorption characteristics, have excellent tumor cytotoxicity and photothermal conversion capacity under the action of infrared exciting light, can induce cell apoptosis and effectively inhibit growth of tumors in mice. The bithiazole bridged binuclear metal complex provided by the invention is a potential novel infrared photodynamic photosensitizer, a photothermal reagent and a sonodynamic therapy sonosensitizer, and has a wide application prospect in photodynamic therapy, photothermal therapy and sonodynamic therapy of tumors.

The application belongs to the technical field of magnetic functional materials, and discloses a dense gadolinium-based fluorocarbonate magnetic refrigeration material and a preparation method and application thereof. The chemical formula of the gadolinium-based fluorocarbonate magnetic refrigeration material is NaGdCO3F2. The material is constructed by anti-magnetic sodium ions and fluorine ions and carbonic acid root mixed bridging ligands to form a dense gadolinium-based three-dimensional honeycomb framework structure. The specific spatial arrangement effectively suppresses the magnetic exchange interaction while maintaining high magnetic density, induces short-range magnetic correlation near 0.5K, suppresses the magnetic order temperature to 0.22K, and widens the effective refrigeration temperature range by generating a Schottky abnormal specific heat wide peak. Under 1T, 2T and 7T magnetic fields, the maximum magnetic entropy change reaches 23.1, 38.9 and 59.1 J·kg ‑1 ·K ‑1 respectively. As an excellent low-temperature magnetic refrigerant, the material has the advantages of good thermal stability, simple preparation process and low cost, and has a wide industrial application prospect in the field of adiabatic demagnetization refrigeration materials.

This invention belongs to the fields of coordination chemistry, molecular magnetic materials, and biofunctional materials. Specifically, it discloses a three-dimensional iron-based metal-organic framework material, its preparation method, and its applications. The chemical formula of the three-dimensional iron-based metal-organic framework material is: [Formula omitted for brevity]. Wherein, is a divalent iron ion, M is a metal ion capable of forming dicyano coordination units, CN is a cyano-bridging ligand, L is a neutral nitrogen-containing bridging ligand, and G is a guest molecule. The material of this invention employs strong coordination bonds to construct a robust three-dimensional framework structure. The Fe(II) center is multiple-coordinated and fixed within the rigid framework by multidentate nitrogen-containing ligands and cyano-bridging anions. After multiple temperature-induced spin-state transition tests, the material of this invention maintains good reversibility in both its crystal structure and functional signal, without structural collapse, guest molecule loss, or ligand detachment. The material of this invention exhibits excellent cycling stability and reusability, making it more suitable for long-term operation in practical devices.