48 results about "Methyl Viologen" patented technology

A process is described for denaturing native double-stranded nucleic acid material into its individual strands in an electrochemical cell. The process disclosed is an electrical treatment of the nucleic acid with a voltage applied to the nucleic acid material by an electrode. The process may also employ a promoter compound such as methyl viologen to speed denaturation. The process may be used in the detection of nucleic acid by hybridizing with a labelled probe or in the amplification of DNA by a polymerase chain reaction or ligase chain reaction. A process is described for annealing complementary strands of nucleic acid by application of an electrical voltage.

The invention discloses a calixarene constructed supramolecular polymer material. The chemical formula of a repeat unit of the material is C210H206N72O64S8; and the material consists of ethyl-bridged p-sulfonated calix[4]arene, cucurbit[8]uril and hexyl-bridged methyl viologen, wherein the ethyl-bridged p-sulfonated calix[4]arene and the cucurbit[8]uril serve as a large-ring host, the hexyl-bridged methyl viologen serves as a guest, and the supramolecular polymer with a host-guest inclusion structure is constructed through host-guest bonding. The invention has the advantages that: by the recognition advantage of the p-sulfonated calix[4]arene and the cucurbit[8]uril on specific groups of the viologen, a fibrous polymer material is prepared by a simple and feasible solution mixing method, and the method is easy to implement, high in yield, convenient and effective; and by a chemical reduction means of adding hydrazine hydrate, the polymer material can be well reduced and depolymerized,and the supramolecular polymer material has wide application prospect in the field of materials.

The invention discloses an electrochromic device based on ZnO nanotubes and a preparation method thereof. The electrochromic device comprises a working electrode, a counter electrode, and electrolyte, wherein the working electrode is ITO glass and is coated with a methyl viologen modified ZnO nanotube array, and the counter electrode is ITO glass or ITO glass coated with a NiO film. The preparation method comprises the steps of working electrode preparation, counter electrode preparation, electrolyte preparation and electrochromic device packaging. For working electrode preparation, first, a ZnO nanorod array is prepared by a hydrothermal method, then, the ZnO nanorod array is eroded by KOH solution into a nanotube array, and finally, the nanotube array is modified with small molecules of methyl viologen. The electrochromic device of the invention has high stability and obvious color change, and has a great advantage in the aspect of making intelligent discoloring windows, displays, electronic paper and the like.

The invention discloses a supermolecular hydrogel material for constructing calixarene and a preparation method of the supermolecular hydrogel material. The supermolecular hydrogel material is prepared from dodecyl modified sulfonated calix[4]arene (SC4AD) and methyl viologen modified polyvinyl alcohol under the interaction of supermolecules. The preparation method comprises the steps of self-aggregating SC4AD in a water liquid to form a micelle; and crosslinking the SC4AD micelle through PVA-MV by virtue of the host-guest bonding capacity of viologen and sulfonated calixarene to form the supermolecular hydrogel which is stable at room temperature. The supermolecular hydrogel material which is stable at room temperature is obtained by using a simple, convenient and feasible liquid mixing way by virtue of the advantage that a specific group of the viologen as a guest can be identified by the sulfonated calixarene. Compared with methods for synthesizing other hydrogels, the method disclosed by the invention has the advantages of simplicity in operation and high yield and is a convenient and effective hydrogel preparation method. The supermolecular hydrogel material has a wide application prospect in the field of materials.

Self-assembled monolayers and multilayer thin film structures were assembled from multiple components that were linked non-covalently by metal-ligand complexation. Non-covalently assembled multicomponent films assembly my the present method obviate problems associated with the covalent assembly of SAMs and multilayer thin film structures from large molecules. In one preferred embodiment, the disclosed film structures comprise 2,6 pyridinedicarboxylate ligands attached to an alkanethiol, which form a self-assembled monolayer on gold. The SAM is subsequently functionalized by sequential deposition of metal ions and ligands, allowing incorporation of one or more chromophores, photooxiding compounds or photoreducing to form multilayer film structures. Transition metals, lanthanide metals and other metals of varying charge may be employed in complexing with with 2,6 pyridinedicarboxylate ligands to form stable ordered structures. The non-covalent assembly method provides for multilayer film formation from mixtures of metal ions and a varying number of film layers. Multilayer thin film structures exhibit stable cathodic photocurrent generation in the presence of methyl viologen or EDTA in solution.

The invention discloses a silver-iodine anion high-polymer helix chain based organic-inorganic hybrid semiconductor material and a preparation method thereof. A molecular formula of the organic-inorganic hybrid wide bandgap semiconductor material is (MV)n(Ag2I4)n, MV in the formula represents organic cation methyl viologen with two units of positive charges, n represents the number of repeated units of a high-polymer structure, and (Ag2I4)n polyanion in the material is of a unique helix chain structure. The organic-inorganic hybrid wide bandgap semiconductor material having good semiconductor performance and thermal stability performance is conveniently and cheaply prepared through coordination polymerization reaction and hybridizing replacement reaction of silver nitrate and alkali metal iodide and a solution of methyl viologen iodide, is moderate in bandgap width and good in heat stability and can be applied to technical field of photoelectron materials.

The invention discloses clostridium beijerinckii with high electricity yield. The number of the strain is M13. Clostridium beijerinckii is collected in the China Center for Type Culture Collection (CCTCC) on September 14, 2013, with collection number of CCTCC NO:M2013424. The invention also discloses an application of clostridium beijerinckii with high electricity yield to electricity generation. When 0.15g / L of methyl viologen serves as an electronic mediator, the maximum output voltage of clostridium beijerinckii in 1g / L of glucose seed solution is as high as 230mV, and the maximum output power density is 79.2mW / m<2>. Clostridium beijerinckii has the advantages that a process is simple, is convenient to operate, is pollution-free and is low in cost; utilization of fuel of clostridium beijerinckii is popularized more widely; the electron recovery rate is relatively high; the energy crisis is relieved; clostridium beijerinckii is an excellent strain suitable for microbial fuel cell study and application.

Carbohydrate detectors employing abiotic fuel cell designs are disclosed. The detectors produce current output using reactions between chemical dyes in alkaline solutions and carbohydrates, such as glucose. A linear relationship between current output of the detector and glucose concentration has been observed. This relationship may be used with measurements of current output when the glucose concentration is unknown to determine the unknown glucose concentration. In certain embodiments, the abiotic detectors may further employ electrodes, such as high surface area carbon materials and commercial air breathing electrodes, without the use of catalysts (i.e., precious metals or biocatalytic species) for glucose detection Organic dyes, such as methyl viologen (MV), methylene blue, methylene green, Meldola's blue, indigo carmine, safranin O, and the like, may serve as the electron mediators.

The invention discloses a bismuth-based perovskite material and a preparation method thereof. The chemical formula of the material is (C12H14N2) BiX5, wherein C12H14N2 represents a positive bivalent methyl viologen cation, and X represents any one or more of Cl, Br and I. The material is prepared by carrying out solvothermal reaction in a methanol solution by taking a bismuth source and haloid acid as raw materials and 4, 4'-dipyridyl or methyl viologen as a structure directing agent. The preparation method disclosed by the invention is simple and convenient to operate and good in repeatability, the photoelectric property of the material can be effectively regulated and controlled by changing halogen, and meanwhile, the metal element bismuth is used for replacing a toxic element lead, so that harm to a human body and pollution to the environment are reduced. The material disclosed by the invention is good in wet and thermal stability, excellent in photoelectric property and good in semiconductor property, and has a wide application prospect in the fields of solar cells, photoelectric materials, photoelectric detection, photo-catalysis / photo-electro-catalysis and the like.

The invention discloses an electrochromic device based on an organic and inorganic composite material and a preparing method of the electrochromic device. A hydrothermal method is adopted to prepare auniform TiO2 nanorod array on an FTO substrate, and then an organic matter methyl viologen solution is used for modification and is finally encapsulated into the electrochromic device. According to the electrochromic device, an organic electrochromic material and an inorganic electrochromic material are combined, the disadvantages of a traditional inorganic electrochromic material of being poor in stability and monotonous in color are avoided, three color change states can be generated, and the electrochromic device has quick response, high stability and obvious color change and has potentialadvantages in the aspects of manufacturing an intelligent color-change window, anti-glare glasses, a display, electronic paper and the like.

The invention relates to a carbohydrate alkaline fuel cell anode and a manufacturing method of the carbohydrate alkaline fuel cell anode. The anode is prepared by combination of the catalytic effect on carbohydrate caused by a viologen compound and a nickel mesh in an alkaline medium, so that the viologen compound is fixed on the nickel mesh, thereby not only improving the catalytic activity of the nickel mesh, but also eliminating the environmental pollution caused by the viologen compound. The anode sequentially consists of two thin films, namely a metal nickel layer and a porous carbon layer from an air side to an electrolyte side. According to the preparation process, methyl viologen is fixed on the nickel mesh by virtue of a microenvironment created by polar porous carbon and non-polar polytetrafluoroethylene, so that methyl viologen is repeatedly used, and the ecological environment risk brought by methyl viologen is greatly lowered. According to the compound electrode structure, the nickel mesh and an electrolyte solution are contacted, so that the catalytic active site of liquid and solid phase boundaries is increased; the catalytic effects of the metal nickel, the porous carbon and the methyl viologen on oxidizing reaction of carbohydrate are combined, so that the electrochemical property of a carbohydrate cell is improved.

The invention discloses a methyl viologen ligand-based metal-organic hybrid material with a photoelectric effect and an adsorption property, and an application thereof, and belongs to the fields of photoelectric materials and environment protection. Comparison between a photoelectric current measured under a dark condition and a photoelectric current measured under the irradiation of 375 nm laserproves that the hybrid material has the photoelectric effect, and has great potential in the fields of the photovoltaic industry, and treatment of organic dyes and reduction of heavy metal pollutionsin environmental protection.

The invention discloses a methyl viologen visual detection method based on a cadmium telluride quantum-dot / filter paper compound. The method comprises the steps of uniformly mixing cadmium telluride quantum-dot solution and glycerol; immersing filter paper strips into the solution and taking the filter paper strips out; absorbing away superfluous glycerol and superfluous cadmium telluride quantum dots on the cadmium telluride / filter paper compound with clean filter paper, drying the cadmium telluride / filter paper compound and cutting the cadmium telluride / filter paper compound into square pieces for standby; adding methyl viologen drops of different concentrations onto the centers of the square filter paper pieces, performing brightness analysis on the centers of the square cadmium telluride / filter paper compound pieces, according to an equation of Q=(F0-F) / F0, obtaining a standard curve; adding methyl viologen drops to be detected onto the cadmium telluride quantum-dot / filter paper compound, analyzing the center of the cadmium telluride quantum-dot / filter paper compound with the methyl viologen drops through imageJ software and performing concentration, and finding the corresponding concentration from the standard curve. The methyl viologen visual detection method based on the cadmium telluride quantum-dot / filter paper compound is simple and easy to implement, applicable to popularization and application; sensors manufactured according to the method is high in selectivity and stability.

Electrochromic salts. Electrochromic salts of dicationic viologens such as methyl viologen and benzyl viologen associated with anions selected from bis(trifluoromethylsulfonyl)imide, bis(perfluoroethylsulfonyl)imide, and tris(trifluoromethylsulfonyl)methide are produced by metathesis with the corresponding viologen dihalide. They are highly soluble in molten quarternary ammonium salts and together with a suitable reductant provide electrolyte solutions that are used in electrochromic windows.

The invention discloses an application of arabidopsis DNA (Deoxyribonucleic Acid) glycosidase AtOGG1 in the aspects of prolonging life of seeds and improving germination vigour of the seeds, belonging to the technical field of plant genetic engineering. In the invention, an AtOGG1 plant expression vector is constructed, a transgenic plant containing the AtOGG1 is prepared, and transgenic arabidopsis seeds have higher artificial aging resistance and higher germination vigour under the stress of methyl viologen, salt, mannitol and high temperature compared with wild type arabidopsis seeds. The AtOGG1 is transferred into important crops such as rice, wheat, corn, soybean and the like, and storage life and vigour of seeds of the important crops also can be improved. The application of the AtOGG1 can greatly reduce global loss caused by deterioration of the seeds and multiple stresses (oxidation, salt, drought and high temperature) every year, has wide application prospect in the fields ofplant variety breeding and agricultural production and has important economic benefit.

The invention discloses an organic / inorganic hybridized cuprous iodine anion high-polymeric chain-based semiconductor material and a preparation method thereof. The molecular structural formula of the organic / inorganic hybridized wide bandgap semiconductor material is (MV)n(Cu2I4)n, wherein in the formula, MV is organic cation methyl viologen with two units of positive charges; n is the number of repetitive units of a polymer structure; the (Cu2I4)n high-polymeric anion in the material is of a linear chain-shaped structure. Through coordination polymerization reaction of cuprous iodide and the solution of methyl viologen iodide, the organic / inorganic hybridized semiconductor material which is good in semiconductor property and thermal stability can be conveniently and cheaply prepared, and the material is moderate in bandgap width and good in thermal stability, and can be applied to the technical field of electronic materials.

The invention discloses a calixarene constructed supramolecular polymer material. The chemical formula of a repeat unit of the material is C210H206N72O64S8; and the material consists of ethyl-bridged p-sulfonated calix[4]arene, cucurbit[8]uril and hexyl-bridged methyl viologen, wherein the ethyl-bridged p-sulfonated calix[4]arene and the cucurbit[8]uril serve as a large-ring host, the hexyl-bridged methyl viologen serves as a guest, and the supramolecular polymer with a host-guest inclusion structure is constructed through host-guest bonding. The invention has the advantages that: by the recognition advantage of the p-sulfonated calix[4]arene and the cucurbit[8]uril on specific groups of the viologen, a fibrous polymer material is prepared by a simple and feasible solution mixing method, and the method is easy to implement, high in yield, convenient and effective; and by a chemical reduction means of adding hydrazine hydrate, the polymer material can be well reduced and depolymerized, and the supramolecular polymer material has wide application prospect in the field of materials.

The invention discloses a method for enhancing the L-phenylalanine exocytosis of escherichia coli. The method comprises the steps of transforming host escherichia coli through recombinant plasmids capable of simultaneously overexpressing tyrosine aminotransferase TyrB, methyl viologen exo transport protein YddG, 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase AroG, chorismate mutase and prephenate dehydratase PheA, shikimate kinase AroK and shikimate dehydrogenase YdiB and producing L-phenylalanine through liquid fermentation, wherein artificial modification is carried out on TyrB, YddG, AroG, PheA, AroK and YdiB encoding genes from the escherichia coli resource so as to get release from the metabolic regulation and vectors are inserted, thus constructing the recombinant plasmids. The method disclosed by the invention has the advantages that the L-phenylalanine exocytosis level of the escherichia coli can be obviously enhanced, the L-phenylalanine yield is high, the concentration of harmful by-product acetic acid is low, the fermentation cost is low and the process is simple; and therefore, the method is suitable for industrial production.

Abiotic fuel cell and battery designs employing chemical dyes in alkaline solutions are disclosed. The fuel cells and batteries are capable of harnessing electrical power from various carbohydrates, including, but not limited to, glucose; in an anode design that does not require catalysts or membranes to separate half-cell reaction chambers. In certain embodiments, the abiotic fuel cell or battery designs may further employ electrodes, such as high surface area carbon materials and commercial air breathing electrodes, without the use of catalysts for glucose oxidation (i.e., precious metals or biocatalytic species). In further embodiments, organic dyes, including but not limited to, methyl viologen (MV), methylene blue, methylene green, Meldola's blue, indigo carmine, safranin O, and the like, may serve as the electron mediators. In some embodiments, the fuel cells or batteries are capable of generating power on the order of about tens of mW / cm2 from glucose and / or other types of sugars.

The invention discloses a functionalized tripillar[5]arene compound preparation method. A functionalized tripillar[5]arene compound is obtained in the mode that hydrazine hydrate functionalized pillar[5]arene and p-hydroxy benzaldehyde functionalized pillar[5]arene react in DMF, and then separation and purifying are conducted. Through nuclear magnetic titration experiments, it is shown that the prepared functionalized tripillar[5]arene compound is complexed with methyl viologen in d6-DMSO, thus adsorption to the methyl viologen by the functionalized tripillar[5]arene compound is achieved, therefore, the methyl viologen in the environment is removed in an adsorption mode, and the adsorption rate reaches 91.2%. Through an ultraviolet absorption spectrum, it is shown that within the concentration range of 2*10<-3> mmol / L to 2*10<-2> mmol / L, a linear relation is formed between the ultraviolet absorbancy degree of a functionalized tripillar[5]arene compound solution and the concentration ofthe methyl viologen, and thus the content of the methyl viologen in water samples is monitored quantitatively.

The invention discloses a method of utilizing an oxidant to treat microalgae to efficiently induce neutral lipid for quick accumulation. The method includes: disposing the microalgae in an autotrophic culture medium for conventional autotrophic culture; when the microalgae are in the middle stage of logarithmic growth, starting to slowly adding a solution containing the oxidant H2O2, Bengal rose, peroxynitrite, decadienal or methyl viologen dropwise, and inducing accumulation of neutral lipid of microalgae cells, wherein content of the neutral lipid in the microalgae cells can be made equal to or higher than that of the neutral lipid generated by using other induction methods for treatment through induced culture for only 24-48h. The method is simple and easy to implement, and the oxidant is used as an inducing factor, so that the content of the neutral lipid in the microalgae cells can be increased quickly, production cost of biological energy resources is lowered, environment-friendly efficient production of bio-diesel raw materials is realized and little pollution is caused to water environment. Especially, when the oxidant H2O2 is used as the inducing factor, H2O2 can quickly degrade H2O and O2 in light and is free of pollution to water environment.

The invention discloses a method for conducting photocatalysis to decompose water and prepare hydrogen. The method comprises the following steps of 1, mixing a compound shown in the first formula I, methyl viologen, ethylenediaminetetraacetic acid disodium salt and colloidal platinum and adding water to dissolve the mixture, so that a solution is obtained; 2, conducting first bubbling treatment onthe solution to obtain a solution which is subjected to the first bubbling treatment; 3, conducting first photocatalytic decomposition treatment on the solution which is subjected to the first bubbling treatment, and collecting a gaseous product to obtain hydrogen, wherein the formulaIis shown in the description, and M+ represents metal ions. By means of the method for conducting photocatalysis to decompose water and prepare hydrogen, visible light can be effectively utilized to conduct photocatalysis to decompose water and prepare hydrogen; meanwhile, the method is low in cost, high in efficiency and controllability, easy to implement, and suitable for being widely popularized, and has very high application value and great practical application significance.

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 a strain of Clostridium Beijerinckii producing electricity. A Cbei-2996 gene in the Clostridium Beijerinckii is inactivated and cannot be normally expressed in the Clostridium Beijerinckii. The invention also discloses a construction method and an application of the high-electricity-producing recombinant Clostridium Beijerinckii. In a 1g / L glucose seed solution with 0.1 g / L of methyl viologen (MV) being an electronic mediator, the recombinant strain 2996 can reach 194 mV in maximum output voltage, while under the same conditions, an original strain 8052 only can reach 85 mV in the maximum output voltage; the maximum output voltage of the recombinant strain 2996 is 2.3 times as that of the original strain 8052. The method has simple operations and low cost, can effectively increase the output voltage of the Clostridium Beijerinckii. The recombinant strain 2996 is an excellent strain for researching and application of microbial fuel cells.

The invention discloses an electrochromic device based on ZnO nanotubes and a preparation method thereof. The electrochromic device comprises a working electrode, a counter electrode, and electrolyte, wherein the working electrode is ITO glass and is coated with a methyl viologen modified ZnO nanotube array, and the counter electrode is ITO glass or ITO glass coated with a NiO film. The preparation method comprises the steps of working electrode preparation, counter electrode preparation, electrolyte preparation and electrochromic device packaging. For working electrode preparation, first, a ZnO nanorod array is prepared by a hydrothermal method, then, the ZnO nanorod array is eroded by KOH solution into a nanotube array, and finally, the nanotube array is modified with small molecules of methyl viologen. The electrochromic device of the invention has high stability and obvious color change, and has a great advantage in the aspect of making intelligent discoloring windows, displays, electronic paper and the like.

Abiotic fuel cell and battery designs employing chemical dyes in alkaline solutions are disclosed. The fuel cells and batteries are capable of harnessing electrical power from various carbohydrates, including, but not limited to, glucose; in an anode design that does not require catalysts or membranes to separate half-cell reaction chambers. In certain embodiments, the abiotic fuel cell or battery designs may further employ electrodes, such as high surface area carbon materials and commercial air breathing electrodes, without the use of catalysts for glucose oxidation (i.e., precious metals or biocatalytic species). In further embodiments, organic dyes, including but not limited to, methyl viologen (MV), methylene blue, methylene green, Meldola's blue, indigo carmine, safranin O, and the like, may serve as the electron mediators. In some embodiments, the fuel cells or batteries are capable of generating power on the order of about tens of mW / cm2 from glucose and / or other types of sugars.

The invention belongs to the technical field of fuel cells and discloses an anode material for a biomass alkaline fuel cell and a preparation method thereof. A carbon thin layer coated with methyl viologen is fixed on a graphene modified nickel foam composite material through single-sided rolling. The preparation method comprises the following steps: preparing graphene oxide suspension by utilizing an oxidation-reduction method; repeatedly depositing graphene on both sides of the nickel foam by taking the graphene oxide suspension as electrolyte, taking nickel foam as a working electrode and taking a platinum electrode as a counter electrode, thereby obtaining a graphene modified nickel foam composite material; tiling the prepared carbon thin layer coated with methyl viologen on one side of the graphene modified nickel foam composite material, and performing roll-in fixation on the composite material until a specific thickness is reached. According to the invention, the graphene modified nickel foam anode material is prepared, and a viologen compound is fixed on the graphene modified nickel foam composite material, so that the performance of the biomass alkaline fuel cell is improved, and the preparation process is cheap, high-efficiency and clean.