64 results about "Molecular configuration" patented technology

The invention relates to a novel reusable water writing paper which is prepared from a color developing component and a substrate. According to the color developing principle of the novel reusable water writing paper, a water photochromic dye is used as the color developing component; after the paper is wetted, molecular configuration or comformation change is caused to further cause obvious color change to develop color; after water is dried, a molecular structure is recovered, and the color fades; different colors can be shown through change of molecular substituent groups. When people write on the paper, handwriting is clear and is not easily diffused. The surface of the paper is smooth and is reusable; the paper, people can do writing and drawing exercises on the paper with a writing brush and can also write on the paper with a pen. In addition, no ink printing can be realized by spraying water. Due to the special response to water, the water writing paper can be applied to humidity detecting cards, safety and anti-counterfeiting field and the like.

The invention discloses a preparation method and application of pH-responsive amino sodium lignosulphonate. The preparation method comprises the following steps: dissolving sodium lignosulphonate in water to prepare a sodium lignosulphonate water solution, regulating the pH of the solution to be 10-13, and activating at 50-70 DEG C for 0.5-1.0 hour; adding an amination modifier, dropwise adding an aldehyde reagent, and reacting at 70-90 DEG C for 2-4 hours after the dropwise adding, so as to obtain an amino sodium lignosulphonate water solution; extracting the obtained amino sodium lignosulphonate water solution by virtue of an alcohol reagent, washing residual solids by virtue of petroleum ether after the extraction, and carrying out freeze drying on washed remnants. The amino sodium lignosulphonate prepared by virtue of the preparation method has remarkable pH response characteristic; by regulating the pH of the water solution of the product, the molecular configuration and the aggregation extent of the product can be changed, and a regular nanoparticle structure can be spontaneously formed; the amino sodium lignosulphonate can be used as a wall material to be applied field of pesticide microcapsules and is hopefully applied to the field of lignin-based nanometer materials.

Embodiments of the present invention provide, among other things, methods, apparatus, and systems for tuning a semiempirical process for predicting energy for different molecular configurations. In an example method, an energy value and an energy gradient are determined for each of a plurality of molecular configurations using an accurate method. A functional form of the semiempirical process is optimized using the determined energy values and energy gradients via multiobjective optimization. The functional form relates one or more parameters to energy values and energy gradients.

The invention discloses a method for manufacturing a flexible electronic device. The method comprises steps of: providing a rigid substrate and successively manufacturing a light-responsive release layer, a sacrificial layer and a flexible substrate body on the rigid substrate; successively forming an electronic device and a packaging film on the flexible substrate body; applying ultraviolet light to a side of the light-responsive release layer so that the light-responsive release layer generates molecular configuration conversion so as to be warped; and stripping the warped light-responsive layer from the rigid substrate, wherein a part of the light-responsive release layer separated from the rigid substrate, the sacrificial layer, the flexible substrate body, the electronic device, and the packaging film form the flexible electronic device. The method for manufacturing the flexible electronic device has no stripping damage and can improve the performance of the electronic device. The invention also provides a flexible electronic device manufactured by the manufacturing method.

The invention provides a method for preparing a glue reduction agent by an amphiprotic polyester polycarboxylic acid compound. The glue reduction agent is prepared from, by weight, 35-45 parts of amphiprotic polyester polycarboxylic acid compounds, 4-10 parts of alcohol and amine compounds, 0.5-4 parts of polyhydric alcohol, 0.1-0.5 part of organic silane lubricating agents, 0.02-0.08 part of emulsification dispersing agents, 0.01-0.1 part of isothiocyanate compounds and the rest water, and the total weight is 100 parts. The components are placed into a reaction kettle and sufficiently stirredfor 0.5 hour to obtain the glue reduction agent prepared from the amphiprotic polyester polycarboxylic acid compound. Methoxy polyethylene glycol monomethyl ether with the molecular weight of 600 isesterified, and positive ion micro-monomers serve as raw materials, reasonable dosage of a chain transfer agent is implemented, so that a molecular configuration with a short main chain and a side chain is acquired, a certain good steric hindrance effect is achieved, the high-density side chain adsorbs water by capillary effects, hydration reaction is delayed, a compact water film is formed on thesurface, and dispersibility and workability of concrete are improved.

The present invention discloses a perovskite solar cell based on an undoped organic hole transport layer and a preparation method. According to the present invention, a compound 2TPATPE is used as the hole transport layer of the perovskite solar cell; the material has high light transmittance and a good film-forming property; and a propeller-like molecular configuration of the compound can effectively suppress close contact between a photoactive layer and the hole transport layer, so that the occurrence probability of charge recombination at an interface is reduced, thereby improving an open-circuit voltage, a circuit current density and a fill factor of the perovskite solar cell and finally achieving high energy conversion efficiency of the perovskite solar cell. Furthermore, a mobility of the compound is high, so that the hole transport layer with a high hole mobility can be obtained without doping an ionic additive, thereby avoiding the problem of a service life of a device, which is caused by hydrophilicity of the ionic additive, and improving stability of the device when ensuring hole transporting performance of the material.

The invention relates to a molecular imprinting electrochemical sensor, which is used for determining melamine in liquid milk and belongs to the technical field of food safety detection. The melamine in the liquid milk is taken as an object of study, and a molecularly imprinted polymer is prepared by electropolymerization on a gold electrode by using the cyclic voltammetry method. The invention constructs a new method for selectively detecting the melamine by taking mixed solution of equimolar hydroxyphenol and o-aminophenol as functional monomers, taking the melamine as template molecules and taking K3Fe(CN)6 as a probe between an imprinting electrode and base solution. The reaction conditions are respectively as follows: the monomer / template mass ratio is 0.55 / 1, the pH value is 5.5, and the temperature is 30 DEG C. The molecularly imprinted polymer imprinted polymer thin film which leaves template molecular configuration holes is prepared by using methanol solution to carry out ultrasonic elution for 6min and removing the template molecules from the electrode. The detection is carried out through the differential pulse method, and the linear range is 0.50-7.50mg / kg. The response time is 10 seconds. The molecular imprinting electrochemical sensor can be used for detecting an actual liquid milk sample without pretreatment, the selectivity is good, and the recovery rate of adding standard is 87.5-109%.

The invention provides a method for preparing a glue reduction agent by an amphiprotic polyether polycarboxylic acid compound. The amphiprotic polyether polycarboxylic acid compound is prepared from,by weight, 35-45 parts of amphoteric polyether polycarboxylic acid compounds, 4-10 parts of alcohol and amine compounds, 0.5-4 parts of polyhydric alcohol, 0.08-0.6 part of lubricating agents, 0.02-0.08 part of emulsification dispersing agents, 0.01-0.1 part of isothiocyanate compounds and the rest water, and the total weight is 100 parts. The components are placed into a reaction kettle and sufficiently stirred for 0.5 hour to obtain the glue reduction agent prepared from the amphiprotic polyether polycarboxylic acid compound. Polyether macro-monomers with molecular weight of 800 and positiveion micro-monomers serve as raw materials, a polycarboxylic acid glue reduction agent molecular configuration with a short main chain and a short side chain is prepared, so that a glue reduction agent molecule has good steric hindrance effects, and a direct competition relation between the glue reduction agent molecule and the polycarboxylic acid glue reduction agent is avoided.

The invention provides an amino acid Schiff base ligand-containing vanadium oxide compound and a preparation method thereof. The toxicity of VO2+ can be reduced by selecting a proper substituent, taking amino acid Schiff base as a ligand, and chemically combining with vanadium to form a tetravalent or pentavalent organic vanadium compound. The vanadium oxide compound has high coordination capability, and can control and stabilize a vanadium oxide coordination compound to fulfill the aim of directionally designing, and regulating molecular configuration and characteristic.

The invention relates to a preparation method of a pH sensitive element based on DNA molecule configuration change. The preparation method comprises the following steps: preparing a DNA self-assembling structure; and adsorbing a DNA molecule and a gold base to obtain the pH sensitive element. The DNA molecule is subjected to the action of H<+1> under an acidic condition and a chain segment has the configuration change to a certain extent; and meanwhile, some DNA chain segments which are sensitive to pH, such as i-motig chain segments, are folded under the action the H<+1>, so that the change of the pH can be directly reflected through the change of the configuration by the DNA molecule. According to the preparation method, the DNA molecule is modified on a gold surface, a material preparation process is developed and the maneuverability is strong; the sensitivity to the change of the pH is high and a rapid reaction can be realized; and a proton-driven environment-friendly and clean reversible biological change-over switch device is provided and has a wide application prospect in the field of biosensors and the field of clean energy sources.

A bistable nematic liquid crystal device includes an array of holes (8) in an alignment layer (6) on at least one cell wall (2). The alignment layer (6) induces a substantially planar local alignment of liquid crystal molecules. The holes (8) have a shape and / or orientation to induce the liquid crystal director adjacent the holes (8) to adopt two different tilt angles in substantially the same azimuthal direction. The arrangement is such that two stable liquid crystal molecular configurations can exist after suitable electrical signals have been applied to the electrodes.

The invention discloses a fluorescent color changing eutectic material under ultra-high pressure conditions and a preparation method thereof, and belongs to the field of molecular solid-state light-emitting materials. A plurality of multi-fluoro-substituted organic small molecules are selected as co-assembly units, and a novel multi-component molecular co-crystal compound is prepared by using a solvent-assisted grinding method, a solvent evaporation method, an ultrasonic synthesis method and the like. Cyano substituted p-phenylene vinyl type molecules and the co-assembled small molecules mutually recognize each other through multiple hydrogen bonds, Pi- Pi force and other non-covalent forces to form a structure-ordered supramolecular structure, changing self-stacking molecular configuration and spatial arrangement of original cyano-substituted phenylene vinyl type molecules so as to achieve a certain modulation effect on photophysical properties. The novel fluorescent color changing eutectic material prepared by the method can produce different fluorescent discoloration behaviors under the ultra-high pressure conditions, is the first fluorescent discoloration eutectic system underthe ultra-high pressure conditions, and has application prospects in the fields of new optical sensors and pressure sensitive materials and the like.

This invention belonging to pre-extraction of fungus polysaccharide on pharmacy is the method to purify fungus polysaccharide with supersonic wave and hyperfiltration. The procedure is as followings: dry fungus fruiting body, leach with supersonic wave, get rid of protein, prefilter, hyperfilter to obtain different constituents and make them various products. This invention optimizes and updates fungus polysaccharide extraction method, identify kinds of fungus polysaccharides according to their effective molecular weight and molecular configuration, and achieve the goal the previous methods have never done.

The invention discloses a dendritic fluorescent chemical sensor, and its preparation method and application, and also discloses a method for identifying and detecting Pd <2+> through the dendritic fluorescent chemical sensor. The invention belongs to the field of organic synthesis and analytical chemistry. The dendritic fluorescent chemical sensor is characterized in that rhodamine B hydrazide as a fluorescent active site is introduced into a dendritic compound to form a novel compound, wherein a structural formula of the novel compound is shown in the patent specification. The preparation method of the dendritic fluorescent chemical sensor comprises the following steps of in an argon atmosphere, putting an aldehyde compound with a quadrilateral molecular configuration into a reactor, adding ethanol into the aldehyde compound to make the compound dissolve, adding dropwisely rhodamine B hydrazide-ethanol solution into the aldehyde compound-ethanol solution with stirring under a constant pressure, wherein a mol ratio of the added aldehyde compound to the added rhodamine B hydrazide is 1: (4.2 to 4.5), when a adding process of the rhodamine B hydrazide-ethanol solution is finished, adding 1.0 to 2.0% by volume of glacial acetic acid into the mixed solution in the reactor, stirring well, carrying out a reflux reaction at a temperature of 100 DEG C for 18 to 22 hours, evaporating the resulting products to remove a solvent and collect residue, washing the residue 3 to 5 times by ethanol, and drying in a vacuum to obtain a dendritic fluorescent chemical sensor product which is a pale pink solid. The dendritic fluorescent chemical sensor prepared by the preparation method has four fluorescent active groups thus a sensing speed and a sensing sensitivity of the dendritic fluorescent chemical sensor is 4 times as high as a sensing speed and a sensing sensitivity of a small molecule. The dendritic fluorescent chemical sensor does not contain toxic solvents.

A bistable nematic liquid crystal device includes an array of upstanding features (10) on at least one cell wall (2). The features (10) have a shape and / or orientation to induce the liquid crystal director adjacent the features (10) to adopt two different tilt angles in substantially the same azimuthal direction. The arrangement is such that two stable liquid crystal molecular configurations can exist after suitable electrical signals have been applied to the electrodes (12, 14).

The invention provides a production method of a photoelectric regulation metal nanoparticle and liquid crystal array structural box, and belongs to the technical field of photoelectricity. The production method provided by the invention is based on nano-structure polarization configuration, molecular configuration matching and an LSPR (Localized Surface Plasmon Resonance) principle of precious metal nanoparticles, utilizes a laser evanescent standing wave focused capturing deposition technology, and changes light intensity of laser evanescent standing waves so as to regulate the spatial form of a metal nano array and liquid crystal composite structure; when an optical field is utilized to regulate focused deposition, different voltages are loaded between upper and lower electrodes, and an electric field between the electrodes is changed to regulate the spatial structure of the metal nanoparticle and liquid crystal composite array structure so as to achieve different spectral responses and photoelectric regulation in a liquid crystal box. The metal nanoparticle and liquid crystal composite array structural box produced by the production method provided by the invention is helpful for providing a novel principle and a novel method for a novel surface plasmon photoelectric display technology.

Provided is a solid luminescent quinoline compound capable of emitting light in a crystalline state, capable of changing the luminescent color not requiring modification of molecular configuration and capable of emitting light in response to external pressure such as heat, physical pressure, etc. The quinoline compound is represented by the following general formula (1):wherein R1 may be the same or different, each representing any of CF3 or CF3CF2; R2 represents any of an amino group, an N,N-dimethylamino group, an N-phenylamino group, a carbazole group, an N-methylamino group or an N-methyl-N-phenylamino group.

The present invention relates to one kind of intramolecular Al3+ cross-linked polymer gel and its preparation process. The gel cross-linking reaction happens mainly between the branch chains inside the identical polymer molecule to form í‹localíŒ netted molecular configuration. The polymer gel has basically unchanged viscosity before and after the gel is formed, and can flow in porous medium with flow resistance obviously greater than that of polymer solution in the same viscosity and residual resistance coefficient greater than the resistance coefficient. The polymer gel features consists of partially hydrolyzed polyacrylamide 0.04-0.08 wt%, aluminum citrate 0.01-0.04 wt%, and NaCl or KCl mineralization degree regulator 0.05-1.0 wt% except oil field sewage. The polymer gel has excellent profile modifying characteristic.

A bistable liquid crystal device comprises first and second cell walls enclosing a layer of nematic liquid crystal material. Electrodes on at least one cell wall apply an electric field across at least some of the liquid crystal material. The inner surface of the cell wall includes a grating alignment structure having a polymeric material coating contacting the liquid crystal material and is substantially insoluble therein. Two stable molecular configurations can to exist in the nematic layer in response to suitable electrical signals applied to the electrodes.

The invention belongs to the technical field of solar cells, and particularly relates to a hole transporting material and preparation method of the hole transporting material and a perovskite solar cell. According to the invention, the hole transporting material introduces 6 methyls and a long-chain alkane on a phthalocyanine ring, thereby being capable of inducing phthalocyanine molecules to forma flat surface-surface stacking molecular configuration on a perovskite layer after film forming so as to enhance the hole mobility of a phthalocyanine molecular film in a solar device and increase the organic solubility of phthalocyanine materials, and then the whole liquid-phase process preparation of the device is realized. Furthermore, the hole transporting material has excellent hydrophobicity, thereby being capable of better protecting a perovskite light absorbing layer to be prevented from being decomposed by the influence of water and oxygen, thereby prolonging the service life of a perovskite solar cell device; the hole transporting material is used for the n-i-p perovskite solar cell device, so that the photoelectric conversion efficiency of the device can reach 17.27%, and thedevice further can maintain more than 90% of the initial photoelectric conversion efficiency after the device is operated for 1300h and is high in stability.

The invention discloses a multifunctional rubber modifier for an all-steel radial tire. The molecule of the rubber modifier which is an in-situ grafted modified borate molecule of which the central atom is a boron element; and the molecular configuration is a three-arm telechelic structure and is in an amphiphilic nonionic configuration. The multifunctional rubber modifier has functions of internal and external lubrication and interfacial activation, can reduce the Mooney viscosity of mixed rubber, and improves the abrasive resistance, flexibility and ageing and fatigue resistance of vulcanized rubber. The multifunctional rubber modifier also can improve the cost performance of rubber products so as to reduce the product cost and improve the performance. The provided preparation method issimple in technology, can achieve higher efficiency and reduce the environmental pollution, is mild in reaction conditions, easy and convenient to operate, ensures that the products are easy to separate, and has large-scale application prospects.

The invention relates to a preparation method of a tree-like polyester-polyglycidol block polymer, which comprises the following steps: mixing a polyester monomer and a double-function initiator, adding stannous caprylate to prepare a polyester polymer with halogenated terminal group, dissolving the polyester polymer with halogenated terminal group and sodium azide in a DMF (N,N-dimethylformamide) solvent, and extracting with ethyl acetate to obtain a polyester polymer with azide terminal group; adding propiolic alcohol into a glycidol ether monomer, and adding potassium diphenylmethane to obtain polyglycidol with alkynyl terminal group; and dissolving the polyester polymer and the polyglycidol in the DMF solvent, adding CuBr and triethylamine, carrying out column chromatography to separate copper salt, and adding aether to precipitate, thereby obtaining the target product. In the copolymer, the HPG is used as a hydrophilic part, and the polyester is used as a hydrophobic part; by using molecular design, the properties of the polymer is regulated and controlled by the molecular configuration structure without changing the chemical composition; and the polymer is endowed with inherent biosafety and property controllability of the block polymer, and can be widely used for preparing medicine-carried nano microspheres.

The present invention relates to the use of reversible dimerization of methylene blue (MB) for sensing humidity. The invention preferably uses titanate nanowires coated with MB. The self-organizational properties of MB on the surface of this nanostructured material studied by spectroscopic means revealed that the light absorption properties of the MB molecules are humidity dependent. Based on the observed humidity dependent metachromasy, we fabricated a humidity sensor using optical fiber technology which is adapted for medical, industrial or environmental applications. The sensor operates with excellent linearity over the relative humidity (RH) levels ranging from 8 to 98%. The response and recovery time can be reduced to 0.5 s while the device exhibits excellent reproducibility with low hysteresis. These performances allow the implementation of the sensor in a breathing monitoring system. Furthermore, the metachromasy was observed for other dyes. This calls for a detailed study of molecular configuration on functional surfaces since it can substantially modify the sensitization efficacy of dyes, e.g. in light conversion.

The invention provides a propeller-type perylene diimide hexamer compound (HPB-PDI6), a core of which is a hexaphenylbenzene (HPB) which is connected with six beta-position substituted PDI units. Theunique molecular configuration of HPB and the space repulsion between the PDI units make the HPB-PDI6 form a three-dimensional distorted configuration which approximates a propeller. The highly distorted structure facilitates reducing the aggregation of the PDI. Polymers of PTB7-Th and HPB-PDIC6 are mixed to prepare an organic solar cell, good photovoltaic properties are exhibited.

The invention relates to a preparation method of L-lyxose and relates to a five-carbon sugar. The invention provides a preparation method of L-lyxose and the method has cheap and easily available raw materials, fewer reagents and simple process. The technical scheme of the preparation method uses L-arabinose as a raw material; L-arabinose is subjected to hydroxyl protection and is reduced into a sugar alcohol, then the molecular configuration is changed under Swern oxidation condition, and finally the product L-lyxose with mirror symmetry conversion is obtained. The method comprises the following steps: synthesizing 5-O-triphenylmethyl-L-arabinose (2); synthesizing 5-O-triphenylmethyl-L-arabitol (3); synthesizing 5-O-triphenylmethyl-1,2,3,4-tetraacetylarabitol (4); synthesizing L-arabitol-1,2,3,4-tetraacetate (5); synthesizing L-lyxose-2,3,4,5-tetraacetate (6); and synthesizing L-lyxose (7).

The invention relates to a new type of reusable water writing paper. The water writing paper is composed of a color-developing component and a matrix. The color component, when exposed to water, can undergo a change in molecular configuration or conformation to cause an obvious color change and develop color. After the water dries, the molecular structure will recover and the color will fade, and different colors can be displayed through the change of molecular substituents. It can be written like a handwriting Clear, not easy to spread, smooth surface, reusable, it is not only suitable for brush books, drawing exercises, but also for daily writing with pens, in addition, it can also use water spray to achieve ink-free printing, due to the special response to water, this type of Water writing paper can also be used in humidity detection cards, security and anti-counterfeiting and other fields.

The invention belongs to the field of organic semiconductor functional materials and relates to a hole transporting material with indacenodithiophene as a core, a synthesis method thereof and an application thereof in perovskite solar cells. The invention takes the indacenodithiophene group as the core structure, and the two ends are connected with N, N-dimethoxytriphenylamine, and different sidechain groups are introduced into the core structure, the molecular configuration of the material and the way of molecular accumulation are adjusted, and then different material properties are obtained. The hole transporting material synthesized by the invention has the advantages of simple synthesis, adjustable energy level, high hole mobility and conductivity, good thermal stability and chemicalstability, and the like. When the hole transporting material is applied to a perovskite solar cell, the photoelectric conversion efficiency is improved, the device stability is enhanced, and the device preparation cost is reduced.

A bistable nematic liquid crystal device includes an array of upstanding features (10) on at least one cell wall (2). The features (10) have a shape and / or orientation to induce the liquid crystal director adjacent the features (10) to adopt two different tilt angles in substantially the same azimuthal direction. The arrangement is such that two stable liquid crystal molecular configurations can exist after suitable electrical signals have been applied to the electrodes (12, 14).