278 results about "Solvent molecule" patented technology

An engineered highly specific DNA-cleavage enzyme delivers a site-specific nick in a double stranded DNA, to cleave one DNA strand within its target site while leaving the opposing DNA strand intact. The engineered enzyme provides the ability to induce a gene conversion event in a mammalian cell. An engineered sequence-specific nickase derived from a LAGLIDADG homing endonuclease is altered by a single amino acid residue, wherein the amino acid residue is involved in the polarization of solvent molecules and acid-base catalysis in the active site without affecting direct contacts between the enzyme and either the bound DNA or bound metal ions. Engineered, site-specific nickase variants, such as of I-AniI and other homing endonucleases, are particularly useful in targeted genome engineering as well as therapeutic, targeted gene repair.

The invention discloses a transition metal complex based on a semirigid bipyridine bisamide organic ligand and terephthalic acid as well as a synthetic method and application of the transition metal complex. The molecular formula of the transition metal complex is as follows: [Zn(3-bpah)(1,4-BDC)).H2O; [Cd(3-bpah)(1,4-BDC)(H2O)], wherein 3-bpah is N,N'-bi(3-pyridine acylamino)-1 2-cyclohexane. The method comprises the steps of mixing Zb<2+> nitrate or Cd<2+> chloride, the semirigid bipyridine bisamide ligand, terephthalic acid and deionized water, adjusting the pH value of the mixture, pouring the mixture into a high-pressure reaction kettle, performing heat preservation in hydrothermal condition, cooling the mixture to room temperature, and airing the mixture, so as to obtain the target complex. The transition metal complex as well as the synthetic method and application of the transition metal complex have the advantages that the synthetic method is simple, the synthetic yield is high, the synthesized complex has high fluorescence-emission property, fluorescent selectivity to different solvent molecules, and fluorescence identification and detection properties for environmental pollutant nitrobenzene, and can be used as fluorescent material.

The invention provides a method for preparing a perovskite thin film in a perovskite solar cell via a solution air extraction and ventilation method. The method comprises the following steps: a perovskite liquid film coated on a surface of a base body is subjected to air extracting and drying operation in an environment where the partial pressure of the solvent is lower than 99% saturated vapor pressure of the solvent at current temperature; during drying processes or after the perovskite liquid film is completely dries, a gas which does not react chemically with a perovskite is let in, and therefore a process that the solvent is evaporated or solvent molecules leave the environment can be accelerated via solvent molecule concentration dilution. Heterogeneous nucleation and growth of the surface of the base body can be realized via control over drying process conditions, and therefore a uniform and compact perovskite thin film can be formed. The method can be used for accelerating liquid film drying processes, making solvent steam molecules leave a surface of the thin film quickly, and obtaining the uniform-structured and compact perovskite thin film; thus current leakage caused by perovskite thin film loopholes can be prevented and the method can help make high-efficiency solar cells; the method is advantaged by simple operation, easy-to-implement property, low cost, high repetition accuracy, convenience for industrialization and the like.

The invention discloses a novel biomolecule labeling method, i.e. taking cyclic iridium coordination compound containing solvent molecules to combine with histidine residue in protein or polypeptide to generate a fluorophore. The method can label polypeptide and bioactive molecules of protein including antibody and the like, and can be further applied to the application field of bioinstrumentation, cell and tissue labeling, biomolecule tracing and the like. Since the fluorescence color of the compound is rich, and the labeling reaction can be completed in normal-temperature and normal butter solution in one step, thus having advantage compared with the commonly-used labeled compound and the labeling method in market, and having wide application prospect.

The invention discloses a gas sensor based on a covalent organic frame material and a preparation method thereof, and belongs to the application field of the covalent organic frame material. Accordingto the method, a first monomer A is dissolved in a first solvent and a first interface modifier is added so as to obtain a first solution; a second monomer B is dissolved in a second solvent and a second interface modifier is added so as to obtain a second solvent; and a support substrate and a reaction catalyst are added after the solvent is uniformly mixed so that load type gas sensor can be obtained and a self-supporting type gas sensor can also be obtain by treating with an etching solution. The sensor can adsorb the solvent molecules into the pores to change the refractive index of the sensor so that rapid and significant color change occurs, and optical sensing and detection of organic vapor or water vapor can be realized.

Here is disclosed a method for generation of a molecular beam from a sample solution, comprising steps of operating a spray-in device to introduce the sample solution in atomized state into a spray chamber, impinging a suitable gas on the sample solution in atomized state or heating the sample solution in atomized state to generate solute molecules deprived of solvent molecules, and then ejecting these solute molecules through an orifice into a low air pressure chamber. The apparatus as well as the method according to the present invention enable to generate a molecular beam for a variety of molecules, particularly for the neutral molecules which can be decomposed by heating at a high temperature or those which can not be sublimated or vaporized even by heating at a high temperature, as long as the sample solutions are prepared. Due to the method as well as the apparatus according to the invention, it is possible to conduct the mass spectroscopy studies and also other spectroscopic analyses about the molecules and the molecular clusters containing in the molecular beam generated in this manner, for example, by irradiating laser beams. It is possible to also possible to deposit the molecules on a substrate.

The invention discloses an electrolyte for improving cycle performance of anode materials of lithium-ion batteries. The electrolyte comprises an organic solvent, lithium salt and an additive, wherein the additive is TTFEB (tri-(2,2,2-trifluoroethyl)borate), and the organic solvent comprises cyclic carbonate and linear carbonate. The added additive, namely, the TTFEB, of the electrolyte facilitates formation of stable SEI films on anode surfaces, prevents co-embedment of solvent molecules, and inhibits further reactions of anodes and the electrolyte. Meanwhile, through addition of the TTFEB, the composition of the SEI films can be improved, inert components such as LiF, Li2O, Li2O2 and the like are promoted, film impedance is reduced, polarization is reduced, and consumption of the lithium-ions is reduced. The TTFEB has an improving effect on the SEI films of the anodes, so that the electrolyte containing the TTFEB can effectively improve the cycle performance of the anode materials, the charging and discharging efficiency and the rate capability.

A system for producing energy includes a solvent chamber, a pressure chamber and a semi-permeable barrier separating the solvent chamber from the pressure chamber. The solvent chamber for holds a solvent, and the pressure chamber hold a solute solution comprising a solute dissolved in a solvent. The semi-permeable barrier is permeable to solvent molecules and impermeable to solute molecules. Solvent molecules effuse across the semi-permeable barrier into the solute solution of the closed pressure chamber to increase the pressure of the pressure chamber, thereby generating energy in the form of hydrostatic pressure. A conversion device may convert the increased pressure in the pressure chamber to energy. The solute solution may be expelled and recycled after use.

The invention discloses a micro-porous copper coordination polymer, a preparation method and application thereof. The copper coordination polymer of the invention is particularly a compound with the chemical formula being {[Cu(L)](DMF)(H2O)}, wherein, L represents the di-anion of 5-(1-tetrazolyl)-1,3-benzene dicarboxylic acid; and DMF represents N,N-dimethylformamide. The compound is prepared on the basis of solvent-thermal method, so that the purity of the obtained crystal is higher. The micro-porous copper coordination polymer of the invention can keep the coordination framework unchanged after the free solvent molecules are detached, larger one-dimensional channels can be shown in the a-axis direction of the crystal; furthermore, the compound has good thermal stability, and the compound has higher adsorbability of hydrogen under the conditions of either 77K normal pressure or high pressure, therefore, the copper coordination polymer is applicable as the adsorption material.

The invention relates to a preparation method of an organic single-layer graphene solution. According to the method, graphite is soaked in an intercalator, so that solvent molecules are intercalated into interlayers of the graphite to obtain a graphite intercalation compound, namely, expandable graphite; the expandable graphite is heated quickly under protection of argon, volumes of the solvent molecules on the interlayers of the graphite expand rapidly, and expanded graphite is obtained; after the expanded graphite is obtained, an ultrasonic dispersion liquid-phase stripping method is adopted for stripping screening so as to obtain a graphene solution, and solid graphene powder is obtained after suction filtration, washing and drying; and the solid graphene is ultrasonically dispersed in an organic solution, and the organic graphene solution which is high in single layer rate and uniform in dispersion and has corrosion inhibition on a metal composite is obtained finally.

The invention provides an electrolyte. The electrolyte comprises a solvent and lithium salt, and the concentration of the lithium salt is 3.1-5.0 mol/L. When the high-concentration electrolyte is used, a complexation state of lithium ions and a solvent is changed from complexation of 3-4 solvent molecules by each lithium ion to complexation of 1-2 solvent molecules by one lithium ion, complexationforce of the lithium ions and the solvent molecules are strong, the energy barrier for solvent reduction is increased, and work voltage is risen. The above high-concentration electrolyte is partiallyreduced on a surface of a cathode, a layer of SEI is formed which is better than that formed through reduction of current electrolytes, so that further decomposition of the electrolyte can be inhibited, thin thickness and good toughness can be kept during a cycle process, accordingly, interface impedance and lithium ion transport number cannot be increased with increase of cycle number, and highcoulombic efficiency and specific capacity can be kept at a battery cycle late period.

The invention discloses a MOFs (Metal-Organic Frameworks) material capable of effectively separating acetylene mixed gas and a preparation method of the MOFs material. The material has a one-dimensional rhombus-shaped channel hole structure, the distribution of a hole diameter is 8.0 angstroms, and the area of a rhombus-shaped window is 7.1*7.1 angstrom<2>. The preparation method of the MOFs material comprises the following steps: dissolving 5-(4-hydro-1,2,4-triazole-4-yl)-1,3-phthalic acid (5TIA) into a mixed solution of N,N-dimethylacetamide and water; adding cuprous iodide and uniformly mixing by ultrasonic waves; putting the mixture into a drying oven and heating the mixture to 75-100 DEG C and keeping the heat; cooling to a room temprature and filtering; washing the mixture with the N,N-dimethylacetamide and naturally drying at a room temprature to obtain a green block-shaped crystal; exchanging for a plurality of times by using an organic solvent; and removing solvent molecules to obtain the activated MOFs material. The MOFs material [Cu(5TIA)] prepared by the invention is named as FJU-22, and can be effectively used for separating acetylene/carbon dioxide mixed gas and acetylene/ethylene mixed gas at a room temperature and normal pressure.

The invention discloses a method for controlling an ink droplet drying process of an inkjet printer. The method is characterized in that a uniform electric field is formed between plate electrodes in pair, a printing substrate is positioned in the uniform electric field, the electric field direction is perpendicular to the surface of the printing substrate to enable surface charges to be generated on the surface of the printing substrate by means of induction or polarization, and spreading of ink droplets on the printing substrate, solvent evaporation and solute film forming process are controlled by coulomb force between the surface charges of the printing substrate and each of solvent molecules and solute molecules in ink. The surface of the printing substrate is modified, and shape and appearance of a printed film material is controlled without damaging device performances.

The invention discloses a printer, comprising a printer body and a radiating drier, wherein the radiating drier comprises a box body device in which the material to be dried can be put and a radiating device which is internally embedded into the box body device and used for garneting radiation, and the radiating device is internally provided with a launcher capable of generating electromagnetic wave. When the electromagnetic wave generated by the launcher is irradiated on the material to be dried, the solvent molecules in the material to be dried repeatedly steer and move under the repeated alternating magnetization of an electric field and a magnetic field, so that the high-speed vibration is formed, the kinetic energy is increased, and the heat energy is sequentially increased; finally, the solvent molecules are heated to leave from the surface of the material to be dried to enter gas phase, so that the effect of material drying can be achieved; and the protective gas is charged in the process of drying, so that the material to be dried can not be oxidized, burnt, exploded and the like when the material is dried.

An ion transporting solvent for use with batteries can be improved by simultaneously shortening a phosphazene compound's pendent groups, eliminating most or all of the distal ion carriers, and randomizing the solvent molecules so as to intentionally disrupt symmetry to the maximum degree possible. The combination of these strategies dramatically improves battery performance to the point where the performance recorded is comparable to batteries using conventional organic solvents.

The invention discloses cerium ion electrolyte using a silver ion as an anode catalyst and a preparation method thereof and aims to provide electrolyte capable of effectively improving the reaction rate of oxidation reduction of Ce3+/Ce4+ electron pairs and improving the charging and discharging efficiency and cycle performance of cells and a preparation method thereof. The electrolyte comprises organic acid-containing or inorganic acid-containing aqueous solution using a cerium ion as a cation, wherein Ag+ content of the aqueous solution is 0.001 to 0.01mol/L. The organic acid is methylsulfonic acid, and the inorganic acid is sulfuric acid or nitric acid. The Ag+ added in the electrolyte is used as the anode catalyst. The cerium ion is a rare-earth element ion and forms a complex with acid radicals and solvent molecules in the solution. The addition of the Ag+ can influence the coordination of the cerium ion, promote the electron transport of the cerium ion on the surface of an electrode, improve the electrochemical performance of the Ce3+/Ce4+ electron pairs, and effectively improve the charging and discharging efficiency and cycle performance of cells.

The invention relates to a dysprosium coordination polymer material with solvent molecule magnetic response, which is a dysprosium (III) coordination polymer with unimolecular magnet behaviors. The chemical formula of the dysprosium coordination polymer material is {[Dy(INO)2(NO3)]}, each asymmetric unit contains dysprosium ions which exist in one coordination environment and stores three HINO ligands in connection modes, and dicaryon dysprosium units are further connected through two ligands to form a three-dimensional porous structure. The preparation method of the dysprosium coordination polymer material comprises the following steps of: mixing Dy (NO3)3.6H2O with HINO, and dissolving in a solvent; carrying out heating reaction, and then mixing solids obtained through filtering and washing with acetonitrile; and removing the acetonitrile after the heating reaction. The dysprosium coordination polymer material disclosed by the invention is novel in structure and based on an isonicotinic nitrogen oxide ligand, contains the nanometer-pore three-dimensional coordination polymer, shows the slow magnetic relaxation behavior and can be used as an information storage material; and the preparation method of the dysprosium coordination polymer material has the advantages of simple process, easiness for implementation and high productivity, and is conductive to large-scale popularization and application.

The invention is applicable to the field of lithium ion batteries, and discloses a battery negative electrode coating, a battery negative electrode sheet, a battery negative electrode sheet manufacturing method, and a lithium ion battery. The components of the battery negative electrode coating include a negative electrode active material, a negative electrode conductive agent, a suspending agent,and a negative electrode binder; and the negative active material includes artificial graphite particles and a hard carbon material layer coated on the outside of the artificial graphite particles. According to the invention, since the artificial graphite particles coated with the hard carbon material are used as the negative electrode active material, therefore, the hard carbon material layer can be used for forming a protective layer outside the artificial graphite particles to prevent the solvent molecules of the electrolyte from being embedded in a negative electrode graphite structural layer; and the hard carbon material has the characteristic of good electrical conductivity, which is beneficial to further improve the cycle performance of the lithium ion battery.

The invention discloses application of a sulfydryl silver cluster coordination polymer in organic solvent detection, and belongs to the cross field of nanometer materials and coordination chemistry. The polymer is a silver/sulfur cluster-based porous coordination polymer with the 12-core silver/sulfur cluster as the node and bridged with a bi-toothed organic ligand. The chemical formula of the compound is [(Ag12(SBu(i)t(/i))8(CF3COO)4(bpy)4)](i)n(/i). The material has amphiphilic ducts and has high capacity for adsorbing small solvent molecules. The solvent molecules in the ducts interact with the ligand to affect the excited state energy level of the material, so that the fluorescent performance of the material changes in different polar solvents. Excellent linear relation exists between the solvent polarity and the fluorescence maximum emission peak wavelength of the material. Therefore, organic solvents can be recognized and detected according to fluorescence spectra. The silver/sulfur cluster-based porous coordination polymer has the advantages of being free of invasion and high in sensitivity and safety and has good application prospects in organic solvent recognition and detection.

The invention discloses a one-dimensional cadmium sulfide nanorod catalyst, and a preparation method thereof and an application thereof in producing hydrogen through acoustic catalytic cracking of water. The catalyst has a wurtzite crystal structure, and is non-centrosymmetric crystal. The catalyst satisfy the structural condition of piezoelectric crystal. The specially oriented nanorod shape of the catalyst can enrich environmental soundwave energy through piezoelectric effect, such that negative charge is produced on the surface of the nanorods. Therefore, pure water cracking is catalyzed, and hydrogen gas is produced. The preparation method mainly relates to a one-step solvothermal method. Cadmium sulfide growth orientation is regulated with the coordination or chelation effect of crystal seeds and diethylenetriamine solvent molecules, and the one-dimensional nanorod morphology is obtained under appropriate reaction temperature and reaction time conditions. The activity of the obtained cadmium sulfide nanorods for cracking pure water to produce hydrogen under sound driving is substantially higher than those of nano-flake wurtzite-type cadmium sulfide sample, micro-spherical wurtzite-type cadmium sulfide sample, and nanorod wurtzite-type cadmium sulfide samples obtained with a traditional two-step synthesis method. The cadmium sulfide nanorod catalyst provided by the invention has a good application prospect in the field of sound energy-hydrogen energy conversion. The preparation method is simple to operate, and is suitable for industrialized production.

The invention discloses a high-ion-conductivity sulfide solid electrolyte based on wet ball milling and a preparation method thereof. The preparation method comprises the following steps: (1) adding raw materials at least comprising Li2S and P2S5, a grinding medium and a solvent into a ball milling tank for sealed ball milling to obtain a mixture a; (2) drying the mixture a under reduced pressure,sealing the ball milling tank under a reduced pressure state, and performing ball milling again to obtain a mixture b; (3) and taking out the mixture b from a glove box, and performing heat treatmentunder the protection of inert atmosphere to obtain the high-ion-conductivity sulfide solid electrolyte material. According to the invention, the porous structure introduced by solvent and crystallization solvent molecules in the obtained sulfide solid electrolyte is eliminated by secondary ball milling under reduced pressure after drying under reduced pressure, so that the high-ion-conductivity sulfide solid electrolyte is obtained. The invention further adopts a hot pressing or hot paired roller mode for molding, thereby enhancing the combination effect of the sulfide solid electrolyte and further improving the ionic conductivity.

The present invention discloses one kind of molecular gel electrolyte comprising gel factor of molar concentration of 0.02-0.1 mol and lithium salt of molar concentration of 0.05-1 mol except water and organic solvent. It gel factor has the molecular structure expression of R-OCHN-X-NHCO-R, where R is C17H35, X is-C6H4-CH2-C6H4-, -C6H4, -C6H12 or -C6H4-O-C6H4-. The preparation process includes mixing the material in the said proportion inside a container, heating to dissolve the solid matter completely and cooling to room temperature. By means of hydrogen bond, pi-pi bond, van der Waals force, etc among gel molecules, the small solvent molecules are fixed to form the molecular gel electrolyte. The molecular gel electrolyte has high conductivity, like liquid electrolyte, and no leakage, like solid electrolyte, and is easy to form.

The invention belongs to the technical field of preparation of a film material, and discloses a solution film formation method and device of an organic material. The method comprises the following stages of dissolving the organic material in a mixed solvent containing a high-boiling point solvent and a low-boiling point solvent, and depositing the organic material on a substrate by a film formation technology to obtain a liquid film; and carrying out normal-pressure evaporation on the substrate containing the liquid film under conditions of rotation, variable frequency vibration and programmable temperature rise to remove the low-boiling point solvent, stopping rotating and vibrating, evaporating the high-boiling solvent under conditions of vacuum and programmable temperature rise to obtain an organic material film. The substrate is shaken in a reciprocating way through rotation and variable frequency vibration, so that the solution keeps flowing, the difference between the edge and the middle of the solution is reduced, and the difference of the surface and the interior of the solution is reduced; and meanwhile, the thermal motion of solvent molecules is accelerated by programmable temperature rise, and the film formation quality of the solvent during the drying process is improved.