109 results about "Viologen" patented technology

The invention belongs to the technical field of humidity sensors, and particularly relates to a wireless passive flexible sensor and a preparation method and application thereof. The flexible sensor comprises a flexible substrate, a planar spiral inductor, a sensitive capacitor and a humidity-sensitive film, wherein the planar spiral inductor and the sensitive capacitor are arranged on the surface of the flexible substrate; the humidity-sensitive film covers the surface of the sensitive capacitor; the planar spiral inductor and the sensitive capacitor are connected in series; the humidity-sensitive film is composed of a mono-substituted carboxyethyl viologen compound. According to the invention, the monosubstituted carboxyethyl viologen compound has good hydrophilicity and has the characteristic that the dielectric constant changes along with the content of adsorbed water molecules, and the monosubstituted carboxyethyl viologen compound is applied to the humidity-sensitive film, so that the sensitivity of a sensor for detecting humidity is improved; meanwhile, wireless transmission of signals is achieved in an electromagnetic coupling mode; the flexible wireless passive sensor provided by the invention can be easily placed in a narrow closed space and can precisely monitor the environment humidity.

The invention relates to viologen-anthraquinone composite electrochromic liquid and a preparation method thereof, the viologen-anthraquinone composite electrochromic liquid comprises 1.2-2.5 parts by mole of viologen salt, 0.8-1.5 parts by mole of anthraquinone derivative and 8-12 parts by mole of electrolyte; the viologen salt is ethyl viologen tetrafluoroborate or heptyl viologen tetrafluoroborate or octyl viologen tetrafluoroborate; the anthraquinone derivative is 1-ethylamino-4-hydroxy anthraquinone or acid blue 43; the preparation method comprises the following steps: preparing an electrolyte solution; adding purple refined salt and anthraquinone derivatives according to the formula; fully dissolving the electrochromic material to form uniform and transparent initial liquid; and degassing the initial liquid to remove oxygen dissolved in the initial liquid. The electrochromic liquid has the advantages that after the purple refined salt and the anthraquinone derivative are added into the dissolving solution according to the proportion of the formula, the two color-changing materials are jointly dissolved in the electrolyte, and when the two color-changing materials are reduced at the same time, spectrum superposition absorbed by the two color-changing materials can cover the whole visible region, so that black and white switching of the electrochromic liquid is realized, and the use effect is good.

The invention discloses an electrochromic medium composition and application thereof.The electrochromic medium composition comprises at least one anode electrochromic material and at least one cathode electrochromic material, and the cathode electrochromic material comprises viologen derivatives. The viologen derivative is fluorenyl viologen prepared by introducing fluorene into a viologen structure, the compound can show different coloring states under different voltages, the compound is matched with a ferrocene derivative, a red and blue mixed coloring state can be realized, and the color of the viologen derivative is improved. Or the compound, dimethyl dihydrophenazine and a ferrocene derivative are matched, so that a neutral gray coloring state can be realized, and the application value of the compound in the field of electrochromism is greatly expanded.

The invention relates to the technical field of microelectronics, in particular to a unimolecular memristor based on a viologen derivative and a preparation method of the unimolecular memristor. The unimolecular memristor based on the viologen derivative comprises an electrode pair and an organic functional molecule, and the organic functional molecule is selected from the viologen derivative and assembled between the electrode pair through an amide condensation reaction. According to the organic functional molecule provided by the invention, functional modification is performed on the basis of a viologen molecular structure, so that an energy barrier of reversible oxidation-reduction reaction of a viologen unit is effectively reduced, and the performance of the single-molecule memristor is remarkably improved; meanwhile, the on-off ratio of the device is also improved by one order of magnitude. According to the preparation method provided by the invention, the stability and repeatability of a monomolecular device can be ensured, and the conductive stability and durability of the molecular junction of the organic functional molecule are effectively improved. The method is simple and convenient to operate, reaction conditions are easy to control, and large-scale production of molecular devices is facilitated.

The invention discloses a viologen compound three-component doped electrochromic material as well as a preparation method and application thereof. The preparation method comprises the following steps: respectively dissolving an ethyl viologen compound, a cyano viologen compound and a methoxyl viologen compound in a DMSO solvent, and mixing according to a molar ratio of (1-6): (1-3): (1-6) to obtain a mixed solution; wherein the ethyl viologen compound is 1, 1 '-diethyl-3, 3'-difluoro-4, 4 '-bipyridine-1, 1'-dionium, and the ethyl viologen compound is one or more of ethyl viologen, ethyl viologen, ethyl viologen and ethyl viologen. The cyano viologen compound is mono (1, 1 '-bis (4-cyanophenyl)-[4, 4'-bipyridyl]-1, 1 '-dionium) monochloride; the methoxy viologen compound is mono (1, 1 '-bis (4-methoxyphenyl)-[4, 4'-bipyridyl]-1, 1 '-dionium) chloride; adding a polymerization catalyst into the mixed solution, stirring and reacting for 1.5 hours to form a reaction solution with a polymer network structure at the reaction temperature of 50-70 DEG C; introducing the reaction liquid into a film forming mold, uniformly coating a substrate with the reaction liquid by adopting a blade coating method, and carrying out heating curing and cross-linking strengthening to obtain the viologen compound three-component doped electrochromic material.

The invention relates to the technical field of nuclear waste treatment, in particular to a cucurbituril-based supramolecular organic framework material as well as a preparation method and application thereof. A construction unit of the supramolecular organic framework material is constructed by taking cucurbit [8] uril (CB8) as a subject and terephthalyl viologen ligand 1, 1 ''-(1, 4-phenylene) bis ([4, 4 '-bipyridyl]-1-onium) salt (PBV. 2X) as an object through the bonding effect of the subject and the object; in the molecular structure of the supramolecular organic framework material, the construction units are staggered and stacked in parallel in the space, and NO3 <-> is located at the gap of the adjacent CB8. The supramolecular organic framework material disclosed by the invention has high structural stability and cationic framework characteristics, and a rigid framework and a pyridine conjugated system of CB8 endow the material with excellent chemical / irradiation stability, so that the material shows ultrahigh removal rate on ReO4 <-> / TcO4 <-> in extreme environments (strong acid, strong alkali and high irradiation).

The invention discloses a polyacid-based metal viologen framework crystalline material as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalytic materials. The crystalline material is synthesized in one step through a hydrothermal method, the molecular formula is Cu2 (H2O) 2 (L) 2 [PW12O40] [OH]. 2H2O, the crystalline material belongs to a monoclinic system, the space group is P21, the cell parameters are alpha = 90 degrees, beta = 114.208 (2) degrees and gamma = 90 degrees, and the structure of the crystalline material is determined through X-ray diffraction. According to the material, accurate compounding of polyacid clusters and metal viologen on the molecular level is achieved, an effective electron transmission channel is constructed, separation of photon-generated carriers is remarkably promoted, and excellent photocatalytic activity is shown. At the ambient temperature, the crystalline material can be used as a catalyst to efficiently degrade dye pollutants (such as methylene blue and rhodamine B) in a water body, the degradation rate within 60 minutes exceeds 90%, and the crystalline material has good cycle stability and structural durability.

The invention belongs to the technical field of electrochromic materials, and discloses a transparent-red changing viologen derivative as well as a preparation method and application thereof. The preparation method of the transparent-red changing viologen derivative comprises the following steps: reacting 1, 2-bis (4-pyridyl) ethylene, a bromine substitute 1 and a solvent to obtain an intermediate product; reacting the intermediate product, a bromine substitute 2 and a solvent to obtain an intermediate; and mixing the intermediate, halogen-containing salt and water, and reacting to obtain the transparent-red variable viologen derivative. The obtained transparent-red changing viologen derivative shows reversible electrochemical oxidation-reduction properties, meanwhile, shows high contrast ratio and has good electrochromic performance, the synthesis method of the viologen derivative is simple, the yield is high, the color range of viologen compounds is enriched, and the application prospect is wide. The method has potential application prospects in the field of electrochromism.

The invention discloses a viologen compound, a display device composed of hydrogel and application of the viologen compound and the display device. A novel viologen derivative electrochromic material (I) is synthesized by selecting a proper substituent group to modify the N position of viologen, then the viologen derivative is assembled into sodium carboxymethyl cellulose hydrogel, and the display device is prepared. The hydrogel with the electrochromic property is obtained; the electrochromic hydrogel material is in a high-transmittance state in a neutral state, when an external voltage is applied, an absorption peak value has an obvious rising change, the electrochromic hydrogel material is purple in a reduction state, and the electrochromic hydrogel material has a potential application prospect in the field of electrochromism; # imgabs0 #

The invention discloses viologen electrolyte containing a polycationic additive and a flow battery of the viologen electrolyte. Belongs to the field of flow batteries. According to the viologen electrolyte containing the polycationic additive, the polycationic additive is added into the viologen electrolyte, and the mass fraction of the polycationic additive in the viologen electrolyte is 0.01%-20%. The polycation additive forms dynamic association with a viologen molecule reduction state through multiple mechanisms such as electrostatic induction, cation-pi interaction and molecular chain coating, so that the aggregation and precipitation behaviors of the polycation additive in an aqueous solution are effectively interfered, the dispersion stability of the electrolyte is remarkably improved, and the cycle life of the battery is remarkably prolonged. The polycation additive has good water solubility and electrochemical inertness, and can stably exist in a system for a long time while the conductivity and reaction reversibility of the electrolyte are maintained. The additive is rich in source, simple and convenient to synthesize, low in cost and suitable for large-scale application of viologen flow batteries, and has a wide industrialization prospect and an energy storage market value.

The invention discloses a viologen-based covalent organic framework material as well as a synthesis method and application thereof, through introduction of an electron donor type unit, a viologen structure is expanded, the stability of viologen free radicals is greatly enhanced, and meanwhile, the cycle performance of molecules is improved; the viologen-based covalent organic framework material obtained by adopting the viologen structure has the advantages of good thermal stability and cycling stability, reversible redox peaks and the like, and can be used as a catalyst for photocatalytic degradation of tetracycline antibiotic drugs; a series plant growth device for photocatalytic degradation of medical animal husbandry wastewater, which is built with a circulating pump, a metal net and the like, can be directly used for a device for changing wastewater into fertilizer water for agricultural irrigation, and is remarkable in degradation efficiency, high in cycling stability and capable of promoting plant root development.

The invention relates to a viologen derivative electrolyte solution with an electrochromic characteristic and a preparation method and application thereof. The electrolyte solution comprises a viologen derivative and ascorbic acid, the viologen derivative is selected from 1-butyl-4, 4 '-dipyridyl or 1-butyl-1'-(2-propenyl)-4, 4 '-dipyridyl, and the viologen derivative is selected from 1-butyl-4, 4'-dipyridyl or 1-butyl-1 '-( The obtained electrolyte solution can be used for preparing an electrochromic device. Compared with the prior art, the obtained electrochromic device based on the viologen derivative electrolyte can realize color conversion from colorless or brown to purple black under relatively small voltage, and has relatively large light modulation amplitude and relatively high response speed.

The application discloses a chalcogen-containing viologen derivative, a preparation method thereof and application of the chalcogen-containing viologen derivative in a flow battery system. The elements contained in the molecule include carbon, hydrogen, nitrogen, oxygen and chalcogen, and the molecule is rich in resources, low in cost and simple in synthesis method. Compared with a traditional bipyridine compound, the introduction of the chalcogen in the middle of the pyridine unit enhances the conjugation of the whole molecule structure and improves the stability of the molecule. The hydrophilic group is introduced into the nitrogen atom through ionization, the water solubility is increased, and the molecule can be used in a more green and environmental neutral aqueous flow battery. Tests show that the neutral aqueous flow battery composed of the molecule as an anode and ferrocene as a cathode has excellent performance, is stable in circulation and has a long service life, and has a good application prospect in the field of large-scale energy storage.

The invention discloses a preparation method and photocatalytic application of a metal viologen derivative framework for catalyzing C-H bond activation oxidative coupling, and belongs to the technical field of photocatalytic materials. In the preparation method, Zn < 2 + > is selected as a metal node, a viologen derivative with an excellent oxygen activation function is selected as a ligand, and a metal viologen derivative framework Zn-bcbpy is obtained through coordination by a solvent evaporation method. The viologen derivative can effectively activate molecular oxygen to generate superoxide free radicals, and then selective activation of C-H bonds is achieved through a hydrogen atom transfer mechanism. Through optimization of reaction conditions, under irradiation of blue light, the reaction yield of the Zn-bcbpy catalytic substrate is 55%, the Zn-bcbpy catalytic substrate can be stably recycled for five times, and good photocatalytic response performance of the catalyst is proved through electrochemical and impedance experiments.

The application discloses a display device composed of a viologen compound and a hydrogel and application thereof, and synthesizes a novel viologen derivative electrochromic material (I) by modifying a viologen N position with a proper substituent group, and then assembles the viologen derivative into a sodium carboxymethyl cellulose hydrogel to obtain a hydrogel with electrochromic properties; the electrochromic hydrogel material is in a high-transmittance state in a neutral state, and when an external voltage is applied, the absorption peak value has a significant rising change; the reduced state is purple, and the electrochromic hydrogel material has a potential application prospect in the field of electrochromism.

The invention discloses a fluorescent viologen-based organic ion pair charge transfer nanoparticle and a preparation method and application thereof.The method comprises the steps that firstly, dithio-oxamide and 4-pyridylaldehyde react under the water-free and oxygen-free condition, and thiazolothiazole bipyridine is prepared; then, under the argon protection state, the thiazolothiazole bipyridine reacts with an alkylating reagent, and N-ionized thiazolothiazole bridged viologen is prepared; and finally, mixing the N-ionized thiazolothiazole bridged viologen with sodium tetraphenylborate and polyvinylpyrrolidone to react, so as to prepare the organic ion pair charge transfer nanoparticles based on the fluorescent viologen. According to the invention, the progressive design from molecular skeleton reconstruction to supramolecular assembly reinforcement systematically breaks the core technical bottleneck of viologen photochromic materials in the aspects of electronic structure and environmental stability.

The present application relates to the field of microelectronics, and particularly relates to a single-molecule memristor based on a viologen derivative and a preparation method thereof.The single-molecule memristor based on the viologen derivative comprises an electrode pair and an organic functional molecule, the organic functional molecule is selected from a viologen derivative, and is assembled between the electrode pair through an amide condensation reaction.The organic functional molecule provided by the present application is modified in function on the basis of a viologen molecular structure, effectively reduces the energy barrier of a reversible redox reaction of a viologen unit, and thus significantly improves the performance of the single-molecule memristor;at the same time, the switching ratio of the device is also improved by an order of magnitude.The preparation method provided by the present application can ensure the stability and repeatability of the single-molecule device, and effectively improves the conductive stability and durability of a molecular junction of the organic functional molecule.The method is simple to operate and the reaction conditions are easy to control, and is conducive to realizing the large-scale production of molecular devices.

The invention relates to a polyacid crystalline state material based on viologen zinc complex modification and a synthesis method and application, and belongs to the technical field of crystalline state color changing materials, the molecular formula of a coordination compound of the polyacid crystalline state material based on viologen zinc complex modification is Zn6II (pbbd) 2 (H2O) 20 (TeMo6O24) 3; wherein pbbd is 1, 1 '-(1, 3-phenyl-m-dimethylene) bis-(4, 4'-bipyridyl-1-onium), and the structural formula is shown in the description. The crystalline material disclosed by the invention is simple in synthesis method, easy to crystallize and high in synthesis yield, and has electrochromism and ammonia-induced chromism properties.

The present invention refers to an electrolyte comprising a viologen compound or a salt or solvate thereof, wherein each of the nitrogen atoms of the viologen are substituted with one aryl group; wherein said aryl groups are equal or different; and wherein said aryl groups are optionally substituted. The present invention also relates to a redox flow battery comprising the electrolyte of the invention, to an energy storage and / or delivery system comprising said battery, to a method of storing and / or delivering electricity comprising said battery, to the use of said battery, to the use of an energy system comprising said battery and to the use of the use of the viologen compound or a salt or solvate thereof, wherein each of the nitrogen atoms of the viologen are substituted with one aryl group; wherein said aryl groups are equal or different; and wherein said aryl groups are optionally substituted as active species of an electrolyte.

This invention belongs to the field of materials synthesis catalysis, and provides a method for preparing a porous organic polymer-supported catalyst and its application in photocatalytic CO2 reduction. The method involves designing an amide-type POP with redox properties using viologen organic ligands, further synthesizing a series of porous organic polymer-supported Ir and Ru-based catalysts, and applying them to photocatalytic CO2 reduction reactions. The novel pyridine amide catalyst provided by this invention has the advantage of simple synthesis, and the porous organic polymer-supported catalyst synthesized from it has the advantages of novel structure and excellent performance. By introducing Ir / Ru metal, the directional movement of electrons within the framework is promoted, serving as the catalytic center for CO2 reduction, thereby improving the utilization rate of visible light and the efficiency of photocatalytic CO2 reduction.

The present invention discloses an immobilized enzyme thin-film electrode, comprising: an electrode, and an immobilized enzyme thin film covering the surface of the electrode, wherein the immobilized enzyme thin film comprises: an N-fluorenylmethoxycarbonyl diphenylalanine thin film and formate dehydrogenase and diallyl viologen dispersed and immobilized in the N-fluorenylmethoxycarbonyl diphenylalanine thin film. The immobilized enzyme thin-film electrode provided by the present invention can not only efficiently electrocatalytically reduce CO2 to produce formate, but also can be reused, has a simple preparation process, and is easy to regulate self-assembly.

An oxygen-independent analyte sensor includes at least one electrode and an oxygen-independent analyte sensing molecule disposed on the at least one electrode. The oxygen-independent analyte sensing molecule is electrografted on to the at least one electrode. The sensor may process an electrochemical impedance spectroscopy (EIS) parameter value in response to exposure to an analyte.

A viologen-based ionic polymer binder, and a preparation method and use thereof are provided, belonging to the technical field of lithium-ion batteries. The viologen-based ionic polymer binder is a polymer prepared from polymerization of a viologen-based acrylate, at least one of an acrylate and poly(ethylene glycol) methyl ether acrylate. When the viologen-based ionic polymer binder is used to prepare a cathode of a lithium-ion battery, a chain segment of the viologen-based polyacrylate could enhance bonding between cathode active materials, promote transportation of lithium ions, and thereby could improve capacity retention and recycling stability of the battery.

This invention discloses an electrochromic material, its preparation method, and its applications. The raw materials of the electrochromic material mainly include modified polyionic liquid, ethyl viologen diiodide, ferrocene, crosslinking agent, and other additives. The main component of the modified polyionic liquid includes an imidazole cationic PIL polymer with flexible alkoxy side groups. The general formula of the imidazole cationic PIL polymer with flexible alkoxy side groups is PIL-m-TFSI and PIL-2-x. This invention solves the problem of suppressing the formation of dimers in viologen-based electrochromic materials by introducing polyionic liquids, thereby improving device performance.

The present invention discloses a pyrene-based viologen, a preparation method thereof, and an electrochromic device. The pyrene-based viologen comprises a compound represented by the general formula (I): #imgabs0#, wherein R is one of methyl, benzyl, methylnaphthalene, methylanthracene, methylbenzo[a]pyrene, methylpyrene, methylphenanthrene, and methylperylene. The pyrene-based viologen molecular design of the present invention forms a unique electron donor-donor-donor conjugated structure by introducing pyrene, benzyl, methylnaphthalene, methylanthracene, methylbenzo[a]pyrene, methylpyrene, methylphenanthrene, or methylperylene and utilizing the hyperconjugation effect of methylene groups. This significantly improves the optical and electrical properties of the viologen, in particular the fluorescence performance and coloring efficiency.

The application provides a thermosetting viologen electrochromic solution and an electrochromic device. The thermosetting viologen electrochromic solution comprises the following components at the following concentrations: 1.5-4.5 g / mL of a diepoxy functional group molecule, 0.5-0.8 g / mL of an anhydride curing agent, 0.1-0.4 g / mL of a viologen compound, and 0.05-0.3 g / mL of a counter electrode material; the diepoxy functional group molecule is at least one selected from bisphenol f diglycidyl ether, bisphenol a diglycidyl ether and bisphenol s diglycidyl ether. The electrochromic device comprises a solid electrochromic layer formed by curing the thermosetting electrochromic solution. The application optimizes the formula, so that the electrochromic solution can achieve thermal curing while ensuring good electrochromic performance, solves the problems of easy leakage and poor safety of the viologen electrochromic device, and can be thermally cured and formed, avoiding the potential adverse effects of the ultraviolet curing method on the performance of the device.

The application discloses a synthesis method of an aldehyde group-containing N-arylated viologen molecule, and the method adopts a Nesmeyanov reaction to prepare the aldehyde group-containing N-arylated viologen molecule by reacting a pyridine compound and an asymmetric iodonium molecule containing an aldehyde group. The synthesis method provided by the application is simple in process, easy to purify, high in yield and strong in universality. The prepared molecule has excellent electrochemical performance and electrochromic performance. The introduction of the aldehyde group further expands the space of modification, provides unlimited possibilities for constructing various functional materials containing viologen, and is expected to be applied to multiple fields such as electrochromic, optical chromic, energy storage, adsorption, supramolecular chemistry, catalysis and sensing.

The invention belongs to the field of new energy materials, and particularly relates to a viologen electrolyte with multi-electron transfer capability, a preparation method and application of the viologen electrolyte in an aqueous organic flow battery. The preparation method comprises the following steps: reacting triethanolamine with phosphorus tribromide to generate a tris (2-bromoethyl) amine intermediate, condensing the tris (2-bromoethyl) amine intermediate with 4, 4 '-dipyridyl to generate a trinuclear viologen precursor, and finally performing quaternization and anion exchange to obtain a target product. The solubility of the prepared viologen electrolyte in an aqueous solution reaches up to 1.82 M, the theoretical charge capacity is 103 Ah L <-1 >, and the viologen electrolyte can perform highly reversible multi-electron redox reaction and shows excellent electrochemical performance. When the material is applied to the aqueous organic flow battery as a negative electrode active material, the battery shows the outstanding advantages of high coulombic efficiency, high energy density, long cycle life and the like.

This invention discloses a parallel-interface engineered viologen-based defective carbon nitride composite material, its preparation method, and its applications, belonging to the field of energy catalysis and photochemical materials technology. The material comprises: a defective graphitic carbon nitride support; single-atom platinum catalytic sites supported on the support; and a selenium-containing viologen compound anchored by covalent bonds in a configuration parallel to the support surface. Through a bilateral covalent bonding strategy, viologen molecules are stably anchored in a parallel configuration to the single-atom platinum-modified defective carbon nitride surface, constructing a highly efficient and stable "electron bridge" structure, significantly enhancing interfacial bonding and photogenerated electron transport efficiency. This composite material exhibits excellent photocatalytic hydrogen evolution activity and efficient coupling ability with benzylamine oxidation under visible light, and its activity retention rate reaches over 92% after 144 hours of cycling. It provides a new paradigm for solving the problem of poor interfacial stability in photocatalysts and has significant application prospects in the field of solar fuel synthesis.

The invention discloses an isoindigo-based viologen electroactive material as well as synthesis and application thereof, and belongs to the technical field of organic semiconductor materials. According to the technical scheme, by modifying an isoindigo skeleton and introducing a flexible chain, the solubility and charge transfer performance of the isoindigo-based viologen electroactive material are effectively improved, and the problems that traditional isoindigo molecules are poor in solubility and dihedral angles are not beneficial to charge transfer are solved; the isoindigo-based viologen electroactive material combines the oxidation-reduction performance of a viologen compound and the charge transfer advantage of isoindigo, and shows rapid electrochromic response and high efficiency; the isoindigo-based viologen electroactive material shows excellent electrochromic performance in visible and near-infrared bands, and a new thought is provided for development of related devices; when applied to preparation of electrochromic devices, the material shows obvious advantages and has wide application prospects and commercial value.