77 results about "Viologen" patented technology

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 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 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 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 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 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 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.

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.

This invention discloses a homogeneous mixed redox electrolyte and an aqueous organic flow battery, belonging to the field of organic flow battery technology. The homogeneous mixed redox electrolyte can be used as either the positive or negative electrode. The positive electrode electrolyte incorporates at least two cyclic nitrile radical-based active materials, and the negative electrode electrolyte incorporates at least two viologen-based active materials. By introducing derivative molecules of the same type but different substituents or bridging atoms into the positive and negative electrode electrolytes, and utilizing the same charged groups or atoms in the substituents, the intermolecular distance is increased through electrostatic repulsion or weak interactions such as hydrogen bonds to stabilize the molecular structure, regulate the molecular distribution in solution, reduce molecular aggregation, and improve battery capacity and cycle stability. The introduction of charged active materials can enhance the battery's rate performance, facilitating higher power density and providing new ideas for the design and application of high-performance aqueous organic flow batteries.

This invention relates to the field of energy storage battery electrode technology, and discloses a highly stable organic polymer electrode, its preparation method, and a battery using the same. The electrode is composed of a bisvioletin side-chain functionalized polyaryl ether compound and nitrogen-doped carbon nanotubes. The organic polymer electrode of this invention, containing a bisvioletin side-chain functionalized polyaryl ether compound, has advantages such as high viologen content, high theoretical specific capacity, high thermal stability, and good flexibility. Sodium-ion batteries using this highly stable organic polymer electrode also exhibit high charge-discharge capacity and excellent cycle stability.

The present application provides cationic viologen derivatives, referred to as transquats, and compositions and uses thereof. The transquats undergo cycles of reduction and oxidation processes in water and are useful in various applications, for example, as electrolytes in Aqueous Redox Flow Batteries (ARFBs). The transquat compounds of the present application have the structure of Formula I

The invention discloses a double-response photochromic and electrochromic (PC / EC) composite film for a multi-mode intelligent display and a preparation method of the double-response photochromic and electrochromic (PC / EC) composite film. According to the thin film, visible light response thiohydracrylic acid modified CdS (MPA-CdS) nano-particles and a multicolor electrochromic viologen derivative (CNPhV) are integrated into an ionic conductive polymer P (VDF-co-HFP) matrix, and the functions of high transparency, quick response and multi-color switching are achieved. The material can rapidly induce a photochromic reaction (yellow-green) under irradiation of 420 nm visible light, electrochromism (yellow-green-red) is achieved by applying different voltages, and dependence of a traditional photochromic material on ultraviolet light is broken through. And the solid polymer matrix design is adopted, so that the problem of liquid electrolyte leakage is effectively solved, and both flexibility and environmental stability are achieved. The film can be prepared through a simple solution process, is suitable for the fields of intelligent display, dynamic information encryption, energy-saving intelligent windows and the like, and has important application value and industrialization prospect.

The application discloses an asymmetric viologen compound and application thereof in water-based flow batteries, and particularly relates to the following steps: taking 4,4'-dipyridine and iodomethane as starting materials, introducing hydrophilic groups such as phosphonic acid groups, sulfonic acid groups or quaternary ammonium salts into both ends of the dipyridine through two-step alkylation, and obtaining a high-purity target product after ion exchange. The derivative has high water solubility (>1.3 mol / L), low transmembrane permeability, a suitable redox potential and excellent electrochemical reversibility. The asymmetric viologen compound is used as a negative electrolyte active molecule, the TEMPO derivative is used as a positive electrolyte active molecule, a neutral salt is used as a supporting electrolyte, a titanium plate or a graphite plate is used as a current collector of the positive and negative electrodes, a graphite felt or a carbon felt is used as the positive and negative electrodes, a commercial anion exchange membrane is used between the positive and negative electrolytes, and a water-based flow battery is assembled. The preparation process is simple, raw materials are cheap and easy to obtain, and the application is suitable for large-scale energy storage systems.

The invention relates to the technical field of electrochromic materials and devices, and discloses an electrochromic-thermochromic device and a preparation method and application thereof. The electrochromic-thermochromic device comprises a first substrate, an electrochromic layer, a thermochromic electrolyte layer, an ion storage layer and a second substrate which are sequentially stacked, wherein the electrochromic layer is made of materials including titanium dioxide molecules and viologen molecules adsorbed on the surfaces of the titanium dioxide molecules, the thermochromic electrolyte layer is made of materials including one of zinc salt or aluminum salt and an OEGMAx-co-MEO2MAy copolymer, and x / y is one of 5 / 95, 10 / 90, 20 / 80, 30 / 70, 40 / 60 and 50 / 50. The electro-thermal dual-response color-changing device can realize near-zero light transmittance, realizes near-zero light transmittance in a wave band of 400-2500nm in a working state, and remarkably improves privacy protection and energy efficiency.

The present invention discloses a viologen polymer and a preparation method and application thereof, belonging to the technical field of organic liquid flow batteries. 1-Methyl-[4,4'-bipyridine]-1-iodide and 2-(3-bromopropyl)-3a,4,7,7a-tetrahydro-1H-4,7-methylisoindole-1,3(2H)-dione containing negative electrode active molecules undergo a substitution reaction to generate a monomer HMPB; (2) the monomer HMPB is subjected to a Grubbs third-generation catalyst-catalyzed ring-opening polymerization to obtain a viologen polymer. The viologen polymer prepared by the present invention adopts Grubbs controlled ring-opening polymerization to increase the solubility of the viologen polymer and improve the energy density of the battery. The prepared aqueous organic liquid flow battery system has the advantages of low cost, stable charge and discharge performance, high solubility of active materials, and is easy to achieve large-scale production.

The application discloses a novel sulfur-containing group element viologen cyclotriphosphazene and an application thereof, expands a conjugate environment of the sulfur-containing group element viologen, and the compound has the following properties: 1, a more stable free radical state; 2, a narrower band gap width and stronger visible light absorption; 3, a low reduction potential and a low LUMO energy level; 4, stronger absorption in the visible light range; 5, better redox performance and efficient photocatalytic directional electron flow. The application provides a synthesis method of the novel sulfur-containing group element viologen cyclotriphosphazene, and the method can extend to multiple types of cyclotriphosphazenes. The cyclotriphosphazenes have multiple functions and can be applied to multiple fields. The application provides application schemes of the novel sulfur-containing group element viologen cyclotriphosphazene in multiple application fields such as a photocatalytic hydrogen production field, an electrochromic field and a photochromic field.

An object of the present disclosure is, at least, to provide an enzyme that dehydroxylates hydroxyl groups at predetermined positions of urolithins having hydroxyl groups at the predetermined positions, and the object can be solved by an enzyme having the following properties (1) and (2): (1) dehydroxylating a hydroxyl group at the 4-position of urolithins; and (2) in the presence of methyl viologen (MV), being activated by one or more components selected from the group consisting of: reduced nicotinamide adenine dinucleotide (NADH); reduced nicotinamide adenine dinucleotide phosphate (NADPH); flavin adenine dinucleotide (FAD); and flavin adenine mononucleotide (FMN).

The invention discloses transparent-green electrochromic hydrogel based on viologen derivatives as well as preparation and application of the transparent-green electrochromic hydrogel. The viologen derivative is shown as a formula (I), and a novel viologen derivative electrochromic material is synthesized by researching and developing a specific substituent to modify the N site of viologen. The viologen derivative is assembled into sodium carboxymethyl cellulose hydrogel, the hydrogel with the electrochromic property is obtained, the hydrogel is in a high-transmittance state in a neutral state, when external voltage is applied, the absorption peak value is obviously increased, the hydrogel is green in a reduction state, and the application prospect in the electrochromic field is wide; (I).

The present application belongs to the technical field of humidity sensor, and particularly relates to a wireless passive flexible sensor and a preparation method and application thereof. The flexible sensor provided by the present application comprises a flexible substrate, a planar spiral inductor and a sensitive capacitor arranged on the surface of the flexible substrate, and a humidity-sensitive film covering the surface of the sensitive capacitor; the planar spiral inductor and the sensitive capacitor are connected in series; and the humidity-sensitive film is composed of a single-substituted carboxyethyl viologen compound. In the present application, the single-substituted carboxyethyl viologen compound has good hydrophilicity and has the characteristic that the dielectric constant changes with the content of adsorbed water molecules, and the present application uses the same in the humidity-sensitive film to improve the sensitivity of the sensor in detecting humidity. Meanwhile, the present application realizes wireless transmission of signals through electromagnetic coupling. The flexible wireless passive sensor provided by the present application can be easily placed in a small and closed space and can precisely monitor the environmental humidity.