52 results about "Bridging ligand" patented technology

A metal-organic framework (nMOF) including an X-ray sensitive prodrug is described. For instance, the MOF can include metal-containing secondary building units (SBU) that are linked together via organic bridging ligands where the SBU includes a metal cation that can absorb X-rays and where at least one organic bridging ligand is substituted by a monovalent moiety derived from a therapeutic agent, such as a chemotherapy and / or immunotherapy agent, via a group that includes a bond capable of radical-promoted bond cleavage. Methods of using the MOF to treat diseases, such as cancer, are also described. The methods can include the combination of radiotherapy or radiotherapy-radiodynamic therapy with chemotherapy or immunotherapy.

The invention relates to the technical field of research and development of photosensitizers for tumor photodynamic therapy, acoustic sensitizers for sonodynamic therapy and photothermal reagents for photothermal therapy, and provides a bithiophene benzo-bridged ligand and a preparation method thereof as well as a bithiophene benzo-bridged binuclear metal complex as well as a preparation method and application of the bithiophene benzo-bridged binuclear metal complex. According to the invention, on the basis of a bithiophene benzo-bridged ligand dtdpip, a bithiophene benzo-bridged binuclear ruthenium complex, a bithiophene benzo-bridged binuclear osmium complex and a bithiophene benzo-bridged binuclear iridium complex are respectively designed and invented. The bithiophene benzo-bridged binuclear metal complex has extremely high stability and excellent two-photon absorption characteristic, and has excellent biotoxicity and photothermal conversion capability under the action of infrared exciting light and ultrasonic waves. The conjugated bithiophene binuclear metal complex provided by the invention is a potential novel infrared photodynamic photosensitizer, a sound-sensitive agent and a photo-thermal reagent, and has a wide application prospect in photodynamic therapy, sonodynamic therapy and photo-thermal therapy of tumors.

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 present application relates to a kind of carboxyl functional time-resolved fluorescent microspheres and its preparation method, belong to fluorescent microsphere technical field.The preparation method described in the present application includes the following steps, under acidic conditions, europium salt, lanthanide salt, beta-diketone ligand, synergistic ligand and bridging ligand occur in organic solvent, obtain binuclear rare earth complex;Binuclear rare earth complex, styrene monomer, acrylic monomer, initiator, polyvinylpyrrolidone, emulsifier occur in solvent dispersion polymerization reaction, obtain the carboxyl functional time-resolved fluorescent microsphere.The preparation method described in the present application directly coats dye in the microsphere interior in polymerization stage, need not consider time-resolved fluorescent dye steric effect, can select greater, but fluorescence intensity stronger, cannot be applied to swelling method binuclear rare earth complex as time-resolved fluorescent dye, so that the fluorescence intensity of time-resolved fluorescent microsphere is higher.

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.

This invention discloses a bifunctional fluorescent probe and method for simultaneously detecting hydroxyl radicals and iron ions, belonging to the field of analytical and environmental monitoring. The bifunctional fluorescent probe is prepared by adding a ruthenium complex [Ru(bpy)2(DA-phen)] during the synthesis of MOF-808. 2+ A one-pot method was used to prepare ruthenium complex-encapsulated MOF material, which is the bifunctional fluorescent probe MOF-808@Ru for the simultaneous detection of hydroxyl radicals and iron ions. This invention uses a zirconium oxide cluster as the metal center and trimesic acid as the bridging ligand, simultaneously encapsulating [Ru(bpy)2(DA-phen)]. 2+ A MOF-808@Ru composite fluorescent probe with dual recognition units was prepared. This probe enables in-situ visualization of endogenous ·OH and Fe in biological systems. 3+ In addition, it can also sensitively detect ·OH and Fe in environmental water samples. 3+ Furthermore, by using fluorescence imaging to dynamically reflect changes in Fenton's reagent during simulated wastewater treatment, it has broad application prospects in the field of environmental monitoring.

The present invention discloses a ruthenium(II) complex fluorescent probe based on a Schiff base-bridged ligand, its preparation method and application, belonging to the technical field of organic chemistry. The ruthenium(II) complex fluorescent probe is [Ru(bipy)2(FPPM)] 2+ , and its structural formula is #imgabs0#. 1-(Pentafluorophenyl)-N-(5-(pyridin-2-yl)pyrazin-2-yl)imine and dichlorobis(2,2'-bipyridine)ruthenium(II) dihydrate are added to an organic solvent for reflux reaction to construct the ruthenium(II) complex [Ru(bipy)2(FPPM)] 2+ . The probe prepared by the present invention has the advantages of visible light excitation, large Stokes shift, high selectivity, high sensitivity, low cytotoxicity, etc., and can realize fluorescence imaging of trace Zn in cells 2+ .

Metal complexes with nitrile ligands of the type MO2X2L2, where M is molybdenum or tungsten, X is a halogen, each L is independently an organonitrile ligand with the general formula NCR, where each R is independently a C2-C18 group. Metal complexes with dinitrile bidentate ligands of the type MO2X2L′, where L′ is a dintrile ligand, and dinitrile bridging ligands of the type (MO2X2)2L′, where L′ is a dinitrile bridging ligand connecting the two metal atoms. Methods of making and using the metal complexes are described.

The invention relates to carbon-supported platinum catalysts utilizing binuclear platinum(III) complexes containing sulfate [(NH4)2[Pt2(SO4)4(H2O)2] or hydrogen phosphate [(NH4)2[Pt2(HPO4)4(H2O)2] bridging ligands as a starting material supported by a carbon-based material, and to the process for producing these catalysts. The catalysts of the invention enhance the performance of proton exchange membrane fuel cells (PEMFCs). Furthermore, the binuclear platinum(III) catalyst containing sulfate or hydrogen phosphate bridging ligands supported by the carbon-based material described in the invention exhibits high catalytic activity and high corrosion resistance.

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 present invention relates to the technical field of fluorescent active substances, and in particular to a zinc (II)-based metal organic framework crystalline material, its preparation method, and application. The molecular formula of the zinc (II)-based metal organic framework crystalline material of the present invention is [Zn(NH2-BDC)2(BMIP)2] n The zinc(II) ion serves as the connecting node, and BMIP and NH2-BDC ligands serve as bridging ligands to form a three-dimensional structure. The asymmetric structural unit of the crystal consists of a BMIP ligand and a deprotonated 2-aminoterephthalic acid ligand. The zinc ion has a four-coordinated, asymmetric tetrahedral configuration. A divalent zinc ion fluorescent sensing material can be prepared using a one-pot solvothermal reaction. The zinc(II) fluorescent sensing material exhibits a strong fluorescence emission spectrum and is suitable for applications in molecular fluorescent probes and metal ion detection.

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 field of preparation of gas separation membrane materials, and discloses a CO2 separation mixed matrix composite membrane and a preparation method thereof. The method comprises the following steps: mixing an amino-containing MOF, a bridging ligand, a first solvent and an optional first catalyst, carrying out a first reaction, and separating a solid product from a first reaction product to obtain a pre-modified solid; mixing the pre-modified solid, a part of the amino polymer, a second solvent and an optional second catalyst for a second reaction, and separating a solid product from a second reaction product to obtain modified MOF; and mixing the modified MOF with water to obtain a mixture, mixing the mixture with the other part of the amino polymer, and blade-coating the mixture on a polysulfone ultrafiltration membrane containing a silicone rubber intermediate layer. The infiltration effect between particles in the CO2 separation mixed matrix membrane and the amido polymer is remarkable, no interface defect is generated, the MOF loading capacity is high, and the CO2 separation mixed matrix membrane has excellent carbon dioxide separation performance.

The present invention belongs to the technical field of fluorescent active material development, and particularly relates to a cadmium (II)-based metal organic framework crystalline material, its preparation method, and application. The molecular formula of the cadmium (II)-based metal organic framework crystalline material is {[Cd3(Br-BDC)3(BMIP)2]·2H2O} n， The three-dimensional structure is formed using cadmium (II) ions as connecting nodes, BMIP and H2 (Br-BDC) ligands as bridging ligands. The structure contains Cd-O secondary structural units, with three Cd atoms forming a trinuclear Cd-O cluster structure through the Cd-O secondary structural units. The Cd1 and Cd1# atoms exhibit mirror-image symmetry. The present invention utilizes a one-pot solvothermal reaction to prepare a divalent cadmium ion fluorescent sensing material. This preparation method has the advantages of a simple process, easy operation, high yield, and good reproducibility. The cadmium (II) fluorescent sensing material exhibits a strong fluorescence emission spectrum and can be applied in molecular fluorescent probes, metal ion detection, and other fields.

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.

The present invention discloses a MOF microsphere and a synthesis method thereof, relating to the field of material technology. The preparation method of the present invention comprises the following steps: S1, dissolving an inorganic salt with metal ions and an amino acid regulator in a solvent, and ultrasonically dissolving the mixture to form a uniform and transparent mixed solution; S2, dissolving an organic bridging ligand in a solvent, and ultrasonically dissolving the mixture to form a uniform and transparent solution; S3, pouring the solution obtained in the above step S2 into the solution obtained in step S1, mixing, and hydrothermally synthesizing the MOF microspheres. The MOF microspheres prepared by the present invention are formed by self-assembly and stacking of octahedral MOF units, transforming from a 30-80nm octahedral structure to a 0.5-3μm MOF microsphere. The microsphere material has microporous, mesoporous, and macroporous structures. The method involved in preparing the MOF microspheres of the present invention is simple, the process is safe and controllable, the prepared material has a uniform structure, a large specific surface area, good stability in aqueous and acid-base solutions, and combines the advantages of the microstructure and function of the octahedral MOF unit.

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 concerns an insoluble salt composition having antimicrobial activity, said composition containing zinc and a cation of a cationic surface-active agent, wherein the cationic surface-active agent is preferably selected from benzalkonium, didecyldimethylammonium, octenidine and chlorhexidine. The invention further relates to an insoluble compound having antimicrobial activity, said compound having a structure represented by the general formula (W"1+)n[Zn2+(L2-)2], wherein W is a cationic surface active agent, preferably selected from benzalkonium, didecyldimethylammonium, octenidine and chlorhexidine and L is a bridging ligand capable of coordinating the zinc cation and capable of binding through an ionic bond the cation of a cationic surface active agent, preferably selected from the group consisting of 2-mercapto-5-benzimidazole sulfonate and 3-mercapto-1-propansulfonate, and mixtures thereof. The invention further relates to an antimicrobial powder composition or a functionalized antimicrobial powder comprising the insoluble salt composition according to the invention and a silica powder, such as silicon dioxide or silicon dioxide amorphous, wherein the salt composition is adsorbed to the surface of the silica powder. The composition and compound of the invention may be included in alcoholic solutions or may be formulated as gel, cream or powder. The composition and compound of the invention may be used in antimicrobial treatment, antiviral treatment and / or antifungal treatment

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.

The invention discloses a method for constructing a three-dimensional structure material based on a metal modified conjugated covalent organic plane Co-TCNB COF and application, and the method comprises the following steps: adding 1, 2, 4, 5-tetracyanobenzene and cobalt metal salt into an organic solution, and mixing; the preparation method comprises the following steps: heating to react, collecting precipitate, carrying out vacuum drying to obtain Co-TCNB COF, adding the Co-TCNB COF and piperazine or pyrazine into a solution to react under the assistance of ultrasonic waves, centrifuging, and carrying out vacuum drying to obtain the three-dimensional structure material. An interlayer bridging ligand piperazine or pyrazine is introduced on the basis of a Co-TCNB planar material to construct a Co-TCNB-PIP or Co-TCNB-PA material with a stable three-dimensional structure, the interlayer bridging ligand can avoid a serious pi-pi lamination phenomenon between the planar materials and promote transfer of interlayer charges, and when the Co-TCNB-PIP or Co-TCNB-PA material is used as a lithium battery negative electrode material, the material has a good application prospect. And the material has higher cycling stability, high conductivity and better ion diffusion dynamic characteristics.

The present invention discloses a zinc coordination polymer, a preparation method thereof and an application thereof in detecting ceftazidime. The coordination polymer chemical formula is {[Zn(fipa)(3-bpdb)2} n , where fipa is a completely deprotonated organic bridging ligand 5-(furan-2-yl)isophthalate, 3-bpdb is an auxiliary ligand 1,4-bis(3-pyridyl)-2,3-dichloro-1,3-butadiene, n represents the degree of polymerization, which is a natural number; each four-coordinated metal Zn is at the center of a distorted tetrahedral geometry. 2+ The zinc coordination polymer is linked to two 1,4-bis(3-pyridyl)-2,3-dichloro-1,3-butadiene chains to form a V-shaped structure. This structure is then connected to a long-range, ordered one-dimensional chain structure along the a-axis by a deprotonated 5-(furan-2-yl)isophthalic acid group. Adjacent chains are connected by abundant hydrogen bonds (C−H···O) and π···π stacking interactions to form a three-dimensional supramolecular framework. The zinc coordination polymer can detect ceftazidime in water in a relatively short time, with high sensitivity, strong selectivity, and good thermal and water stability. It has great potential for the detection of ceftazidime antibiotics.

The invention discloses a ruthenium (II) complex fluorescent probe constructed based on a Schiff base bridging ligand and a preparation method and application thereof, and belongs to the technical field of organic chemistry. The ruthenium (II) complex fluorescent probe is [Ru (bipy) 2 (FPPM)] < 2 + >, and the structural formula of the ruthenium (II) complex fluorescent probe is # imgabs0 #. The preparation method comprises the following steps: adding 1-(pentafluorophenyl)-N-(5-(pyridine-2-yl) pyrazine-2-yl) imine and bis (2, 2 '-bipyridine) ruthenium (II) dichloride dihydrate into an organic solvent, and carrying out a reflux reaction to construct the ruthenium (II) complex [Ru (bipy) 2 (FPPM)] 2 +. The probe prepared by the invention has the advantages of visible light excitation, large Stkes displacement, high selectivity, high sensitivity, low cytotoxicity and the like, and can realize fluorescence imaging of trace Zn < 2 + > in cells.

The present invention relates to the field of catalyst technology, and in particular to the preparation of a copper (II) catalyst and its application in catalyzing the synthesis of polyvinyl chloride. The present invention simultaneously coordinates a copper ion with a 1-(3-carboxyphenyl)-5-methyl-4-oxo-1,4-dihydropyridazine-3-carboxyl (3-PDCA) ligand and a 4,4'-bipyridine ligand, and utilizes two bridging ligands to form a special hexagonal network structure, thereby obtaining a copper (II) catalyst with a novel structure. The copper (II) catalyst has high acetylene conversion and good stability. More importantly, the development of a new coordination polymer catalyst makes it possible to replace traditional catalysts, thus filling the industry gap in mercury-free production of polyvinyl chloride using the calcium carbide process.

A filter-drier unit for a refrigerant includes an exterior housing formed of a hard material, and a desiccant material supported within the exterior housing and being formed of a metal-organic framework material having inorganic metal ions and bridging ligands that link the metal ions. The metal-organic framework has a three-dimensional permanently porous structure that has at least one chemically tunable characteristic, such as pore size, pore volume, and surface area.

The invention relates to the technical field of fluorescent active substances, in particular to a zinc (II)-based metal organic framework crystalline material as well as a preparation method and application thereof. The molecular formula of the zinc (II)-based metal organic framework crystalline material is [Zn (NH2-BDC) 2 (BMIP) 2] n, zinc (II) ions serve as connecting nodes, BMIP and NH2-BDC ligands serve as bridging ligands to be in bridge connection, a three-dimensional space structure is formed, an asymmetric structural unit of a crystal comprises a BMIP ligand and a deprotonated 2-amino terephthalic acid ligand, and the molecular formula of the zinc (II)-based metal organic framework crystalline material is as shown in the specification. And the zinc ion is of a four-coordinated asymmetric tetrahedral configuration. The divalent zinc ion fluorescence sensing material can be prepared by adopting a one-pot solvothermal reaction, and the zinc (II) fluorescence sensing material is relatively high in fluorescence emission spectrum intensity and can be applied to the fields of molecular fluorescence probes, metal ion detection and the like.