75 results about "Rotaxane" patented technology

Provided is a lithium secondary battery, comprising a cathode, an anode, and a porous separator or electrolyte disposed between the cathode and the anode, wherein the anode comprises: (a) an anode active layer containing a layer of lithium or lithium alloy, in a form of a foil, coating, or multiple particles aggregated together, as an anode active material; and (b) a thin layer of a high-elasticity polymer, disposed between the anode active layer and the porous separator or electrolyte; the polymer having a recoverable tensile strain from 2% to 1,500%, a lithium ion conductivity no less than 10−6 S / cm (typically up to 5×10−2 S / cm) at room temperature, and a thickness from 1 nm to 10 μm, wherein the high-elasticity polymer contains a polyrotaxane network having a rotaxane structure or a polyrotaxane structure at a crosslink point of the polyrotaxane network.

Bistable molecules are provided with at least one photosensitive functional group. As thus constituted, the bistable molecules are photopatternable, thereby allowing fabrication of micrometer-scale and nanometer-scale circuits in discrete areas without relying on a top conductor as a mask. The bistable molecules may comprise molecules that undergo redox reactions, such as rotaxanes and catenanes, or may comprise molecules that undergo an electric-field-induced band gap change that causes the molecules, or a portion thereof, to rotate, bend, twist, or otherwise change from a substantially fully conjugated state to a less conjugated state. The change in states in the latter case results in a change in electrical conductivity.

The invention discloses a cucurbit [7] uril [3] rotaxane as well as a preparation method and application thereof, and belongs to the technical fields of organic synthesis and analytical chemistry. A fluorescence probe cucurbit [7] uril [3] rotaxane prepared by the method can be applied to high-selectivity and high-sensitivity detection of lysine or arginine or a mixture of the lysine and the arginine. Under the medium condition of an aqueous solution, a trace amount of lysine or arginine or the mixture of the lysine and the arginine can be detected by taking cucurbit urils supramolecular self-assembly as a probe system by adopting a fluorescence emission spectrophotometry at high sensitivity and high selectivity. The invention also discloses a preparation method and a technological condition of the cucurbit [7] uril [3] rotaxane. The reacting fluorescence excitation wavelength of the cucurbit [7] uril [3] rotaxane and the lysine or the arginine or the mixture of the lysine and the arginine is 317nm; and the maximal emission wavelength is 375nm.

The present invention provides for methods and compositions for transporting agents and macromolecules across biological membranes. In one embodiment, the invention relates to a method for enhancing transport of a selected agent across a biological membrane, wherein a biological membrane is contacted with a composition containing a biologically active rotaxane capable of selectively transporting the selected agent. The host-rotaxane is effective to impart to the agent an amount transport and / or rate of trans-membrane transport across a biological membrane that is greater than the amount and / or rate of trans-membrane transport of the agent without the host-rotaxane.

The invention aims at providing a method for preparing dimer(fatty acid)yl polyester by grafting on cyclodextrin. The preparation method is characterized in that dimeric fatty acid, glycols monomer and maleic anhydride are condensed, thus forming unsaturated polyester the main chain of which contains massive double bonds, then phenylethylene is adopted to be polymerized with double bond free radical on the main chain, and partial crosslinking is produced, thus forming cured dimeric fatty acid polyester. Then glycidyl methacrylate (GMA) is taken as grafting intermediate, and cyclodextrin pseudo rotaxane is successfully grafted onto the matrix of dimer(fatty acid)yl polyester, thus forming granular material with the diameter of about 0.5mm. Owning to hydrophobic interaction of cavity of cyclodextrin, the material can absorb or contain organic micromolecule and can be taken as absorbing material or functional material.

The invention provides a supramolecular self-assembly biological chip. The supramolecular self-assembly biological chip comprises a substrate (1), first chain molecules (3) which are fixed on the surface of the substrate, and second chain molecules (4) which are fixed on the surface of the substrate, wherein the first chain molecules and the second chain molecules are fixed on the substrate at intervals; part of one end, which is far away from the substrate, of each first chain molecule is included by cyclodextrin (2); the cyclodextrin comprises a functional group which can be directly or indirectly bound with protein molecules; and each second chain molecule is not longer than each first chain molecule. Poly(pseudo)rotaxane which is formed by coating the cyclodextrin and the first chain molecules and the second chain molecules which are arranged uniformly at the intervals are arranged on a self-assembly layer on the surface of the biological chip, a three-dimensional space has a dense, controllable and changeable structure, and compared with a two-dimensional surface, the three-dimensional space can fix more detection molecules such as the protein molecules. Moreover, the invention also provides a preparation method and application of the biological chip.

Provided is a rechargeable alkali metal-sulfur cell comprising an anode active material layer, an electrolyte, and a cathode active material layer containing multiple particulates of a sulfur-containing material and wherein at least one of the particulates is composed of one or a plurality of sulfur-containing material particles being embraced or encapsulated by a thin layer of a high-elasticity polymer (containing a polyrotaxane network having a rotaxane structure or a polyrotaxane structure at a crosslink point of the polyrotaxane network) having a recoverable tensile strain from 2% to 1,500%, a lithium ion conductivity no less than 10−6 S / cm at room temperature, and a thickness from 0.5 nm to 10 μm. This battery exhibits an excellent combination of high sulfur content, high sulfur utilization efficiency, high energy density, and long cycle life.

Provided is an anode active material layer for a lithium battery, comprising multiple particulates of an anode active material, wherein a particulate is composed of one or a plurality of particles of a high-capacity anode active material being embraced or encapsulated by a thin layer of a high-elasticity polymer having a recoverable tensile strain no less than 5% when measured without an additive or reinforcement, a lithium ion conductivity no less than 10−6 S / cm at room temperature, and a thickness from 0.5 nm (or a molecular monolayer) to 10 μm (preferably less than 100 nm), and wherein the high-elasticity polymer contains a polyrotaxane network having a rotaxane structure or a polyrotaxane structure at a crosslink point of the polyrotaxane network.

The present invention relates to a preparation method for cyclodextrin-based hyperbranched poly-rotaxane in the chemical technology field. The preparation steps are: the cyclodextrin is dissolved in water, wherein methyl benzene sulfonyl chloride p-methyl benzene sulfonic chloride is added. The solution is stirred and filtered to get transparent solution; then chloride ammonia is added into the solution to adjust the pH value; then the solution is crystallized to get tosylation cyclodextrin; tosylation cyclodextrinand the excessive amine monomer are dissolved in the N, N-dimethyl formyl, and react in the heat with the protection of nitrogen. The reaction product is deposited by acetone to get crude amic-substitute cyclodextrin product which is then dissolved by the mixed solution of carbinol and water. Then the solution is deposited for a plurality of times by the acetone to get amic-sinlge-substitute cyclodextrin; the amic-sinlge-substitute cyclodextrin and the Maikeer addition reagent are dissolved in the water or N, N-dimethyl formyl or dimethyl sulfoxide, and are heated for reaction under the protection of nitrogen to get pale yellow or colorless solution; The solution is deposited by methanol or acetone to get pale yellow or colorless powder. The hyperbranched polymer generated by the present invention is of the characteristics of both the hyperbranched polymers and the cyclodextrin.

The invention relates to a method for preparing an aliphatic polyester-cyclodextrin poly (pseudo) rotaxane. The method comprises the following steps: dropwise adding a cyclodextrin solution into a biodegradable aliphatic polyester solution, magnetically stirring for 6-20 h at the temperature of 30-80 DEG C, then cooling to the room temperature and continuous reacting for 5-10 h; repeating the process for 2-4 times, so as to obtain an aliphatic polyester-cyclodextrin poly (pseudo) rotaxane solution; adding a solvent for precipitating the solution, drying separated precipitates for 12-24 h in a drying oven, then respectively washing with the solvent and deionized water, and drying for 12-24 h in the drying oven, so as to obtain the cyclodextrin-aliphatic polyester poly (pseudo) rotaxane. The method has the advantages that the preparation process is simple; the prepared cyclodextrin-aliphatic polyester poly (pseudo) rotaxane is good in biocompatibility and good in hydrophilia and has no toxicity; the poly (pseudo) rotaxane prepared by macromolecular assembly of cyclodextrin and aliphatic polyester has a wide application prospect in the fields of drug release, protein isolation and purification and the like.

Embodiments relate to the field of chemistry and biochemistry, and, more specifically, to novel near-infrared dyes that are photostable and resistant to quenching. The dyes belong to a novel family of squaraine rotaxanes, and they are particularly well-suited for use in biological applications. Also disclosed are methods of synthesizing the dyes and methods of using the dyes.

The present invention relates to a novel polyrotaxane compound having a specific chemical structure, a photocurable coating composition that may provide a coating material having excellent mechanical properties such as scratch resistance, chemical resistance, abrasion resistance, and the like, and excellent self-healing capability, and a coating film obtained from the photocurable coating composition.

The invention provides all-cyclodextrin poly-rotaxane and a preparation method thereof. The preparation method comprises the following steps of: adding 1 weight part of linear polymer axis chain of which the tail end contains an alkyne bond, 5 to 20 weight parts of cyclodextrin and 30 to 500 weight parts of water into a reactor, ultrasounding the mixture for 1 to 30 minutes and then stirring the mixture for 1 to 24 hours to form a quasi poly-rotaxane suspension; and under the protection of nitrogen gas, adding 0.47 to 3.8 weight parts of nitrine mono-substituted cyclodextrin blocking agent, 0.05 to 0.5 weight part of CuSO4.5H2O, 0.05 to 0.5 weight part of 1,1,4,7,7-pentamethy-diethylenetriamine and 0.1 to 0.6 weight part of sodium ascorbate into the quasi poly-rotaxane suspension in turn, performing lucifugal reaction for 10 minutes to 8 hours at room temperature, and performing centrifugation, dissolution, deposition, hot water washing and drying to obtain the all-cyclodextrin poly-rotaxane. Compared with the prior two-pot method, the preparation method has the advantages of high speed, high efficiency, environmental protection, high yield and the like. The obtained poly-rotaxane has extensive application prospects in the fields of biological medicaments, high-performance materials and the like.

A rotaxane consisting of a cucurbituril and an uncharged guest molecule, having low or null affinity therebetween is provided as well as processes for providing the same. Various uses as energy converters (“frictionless” molecular motors), biochips and biosensors using the same are also provided.

The present invention discloses a method for preparing poly(pseudo)rotaxanes with gamma-cyclodextrin and polyvinyl alcohol, wherein the method comprises the following steps: using the vinyl acetate as a monomer, the methanol as a solvent and azobisisobutyronitrile as an initiating agent for preparing the polyvinyl alcohol through adjusting the concentration of the monomer or the initiating agent in the system; dissolving the prepared polyvinyl alcohol into the water, after mixing to dissolved, adding the solid powder of gamma-cyclodextrin, and assembling the gamma-cyclodextrin and the polyvinyl alcohol in the temperature of 80 DEG C while mixing; and after evaporating the solvent, vacuum-drying the obtained concentrated liquor for obtaining the gamma-cyclodextrin and polyvinyl alcohol poly(pseudo)rotaxanes. The method of the invention has the advantages of simple preparing technique, excellent bioavailability of the prepared poly(pseudo)rotaxanes, no toxicity of the product and excellent water solubility. The poly(pseudo)rotaxanes assembled by the cyclodextrin and the macromolecule has broad application prospect in the directions of medicine releasing, protein separating purifying, etc.

[Object] To provide a hydrophobic linear polyrotaxane molecule which is soluble in an organic solvent, and a crosslinked polyrotaxane using the same.[Solving Means] A hydrophobic linear polyrotaxane molecule has a cyclic molecule, a linear molecule including the cyclic molecule with piercing through the cyclic molecule, and blocking groups placed at both end terminals of the linear molecule to prevent the cyclic molecule from leaving from the linear molecule. The linear molecule is hydrophobic. The linear molecule is polycaprolactone and has a molecular weight ranging from 5,000 to 100,000. The cyclic molecule is α-cyclodextrin, β-cyclodextrin or γ-cyclodextrin.A crosslinked polyrotaxane is formed by combining the hydrophobic linear polyrotaxane molecule and a polymer through the cyclic molecule.

Disclosed are a novel polyrotaxane having a main chain backbone essentially composed of —Si—O—, and a method for producing such a novel polyrotaxane. Also disclosed are a polyrotaxane having stretchability and / or viscoelasticity, while exhibiting oxygen permeability, heat resistance, chemical resistance, environmental resistance and / or durability, and a method for producing such a polyrotaxane. Further disclosed are a crosslinked polyrotaxane obtained by crosslinking the polyrotaxane with another polymer and / or polyrotaxane through a chemical bond, and a method for producing such a crosslinked polyrotaxane. Specifically disclosed is a polyrotaxane obtained by arranging blocking groups on both ends of a pseudopolyrotaxane, wherein a linear molecule passes through the open portion of a circular molecule in a skewering manner, for preventing elimination of the circular molecule from the linear molecule. In this polyrotaxane, the linear molecule has a main chain backbone essentially composed of —Si—O—.

The invention relates to preparation and applications of two three dimensional pseudo-rotaxane type metal organic framework materials with multiple acid groups. The invention aims to solve the problemthat the capacitance of a super capacitor whose electrodes are made of some metal organic framework materials with multiple acid groups is not high, and provides a material used as the electrode of asuper capacitor to increase the capacitance and a preparation method thereof. The chemical formulas of two materials are [CuIICuI3(H2O)2(btx)5(PWVI10WV2O40)].2H2O(1) and [CuII2CuI2(btx)5(SiMoVI10MoVI10MoV2O40)].6H2O(2), wherein btx represents 1,4-bis(triazole-1-methyl) benzene. The preparation method comprises following steps: adding polyacid, copper salts, and organic ligands into distilled water, evenly stirring, adjusting the pH value, and carrying out reactions for three days at a temperature of 160 DEG C. The specific capacitance values of two materials are 138.4 F g<-1> (1) and 82.1 F g<-1> (2) under a current density of 2 A / g. A research model is provided for improving the super electrical performance of metal organic framework materials with multiple acid groups only by changing the polyacid kinds.

The invention discloses a rotaxane molecular machine of naphthalimide crown ether and a pH meter based on the molecular machine. Structural formula of the molecular machine is represented as a formula (I) as shown in the specification. The pH meter includes a gold electrode and the rotaxane molecular machine of the naphthalimide crown ether which is adsorbed on the surface of the gold electrode to form a self-assembled monolayer. The synthesized rotaxane molecular machine of the naphthalimide crown ether is bonded with the gold electrode through a disulfide bond, to result in transfer of the molecular machine and charges on the gold electrode in a process of adding acid or alkali, thus achieving online rapid monitoring of pH value; the molecular machine can avoid accumulation of waste generated from the whole monitoring process on the monolayer, thus enhancing detection limit, sensitivity and fatigue resistance.

The present invention discloses a preparation method for cyclodextrin-based hyperbranched poly-rotaxane in the chemical technology field. The present invention takes use of a ''composition fist and polymerization after'' approach to combine the main polyamines monomer with the cyclodextrin in the water and then the product is added with Maikeer addition reagent for polymerization. Petroleum ether is added to get rid of deposit generated in the composition process of the free cyclodextrin. And the product is liquid-separated, cooled and dried to get hyperbranched poly-rotaxane. The hyperbranched poly-rotaxane is of a plurality of cyclodextrins. Each cyclodextrin molecule is locked by the branched point of the hyperbranched polymer to prevent the falling off of the cyclodextrin molecule. The proportion of the cyclodextrin on the polymer chain can be controlled through the adjustment of the amount of cyclodextrin. The hyperbranched poly-rotaxane is of a novel hyper-molecular structure, and can be taken as the basis for the design of other hyper-molecular system as the molecular machine. The present invention can be used in drug control release field, biological sensor field and so on.

The conductive polyrotaxane of the present invention contains an electron-accepting cyclic molecule in each of its repeating unit. Since the electron-accepting cyclic molecule remains stable because of molecular interaction with a π-conjugated oligomer molecule, the electron-accepting cyclic molecule is not dissociated during rotaxane polymerization reaction, and thus a conductive polyrotaxane of stable quality can be obtained.

The invention provides a novel method for synthesizing hyperpolarized xenon-129 (HP Xe) biosensors by using pseudo-rotaxane structures of gamma-cyclodextrin. These supramolecular complexes form novel ternary structures in the presence of HP Xe which can be detected via 129Xe MR spectroscopy and imaging techniques. The rotaxane-type complex can be tagged with an affinity label for detecting a target in a biological subject.

A pseudorotaxane, a rotaxane and a catenane are provided. The pseudorotaxane includes at least a macrocyclic host molecule, a guest molecule, and a metal ion. The host molecule contains at least a binding unit and an aromatic linking spacer. The guest molecule has at least a recognition unit. The metal ion is used to template the threading of the guest molecule through the macrocycle host molecule by coordinating to a binding pocket formed from the binding unit of the macrocycle and the recognition moiety of the guest molecule. Rotaxanes or catenanes can be synthesized from the pseudorotaxane complexes, with or without the metal template ion in their molecular structures.

This invention provides the synthesis of biocompatible and high functional hybrid nanomaterials consisting of pseudorotaxanes, pseudopolyrotaxanes, rotaxanes, polyrotaxanes, nanoparticles and quantum dots (QDs). The molecular self-assembly of hybrid nanomaterials lead to the formation of nano-objects with different shapes such as core-shell, spindle-like or necklaces. Due to their well-defined molecular self-assemblies, carbohydrate backbone, high functionality and several types of functional groups together with the high luminescence yield, thermal and physical properties and synthesized hybrid nanostructures were recognized as promising candidates for a wide range of applications.

The conductive polyrotaxane of the present invention contains an electron-accepting cyclic molecule in each of its repeating unit. Since the electron-accepting cyclic molecule remains stable because of molecular interaction with a π-conjugated oligomer molecule, the electron-accepting cyclic molecule is not dissociated during rotaxane polymerization reaction, and thus a conductive polyrotaxane of stable quality can be obtained.

The present invention relates to a cross-linking agent, wherein the main component of which is rotaxane comprising a long-chain axis molecule and at least one cyclic molecule that encloses the axis molecule, wherein the rotaxane introduces side chains or tail chains containing active hydrogen groups to at least two parts of the cyclic molecule and to long-chain parts, located on the two sides of the cyclic molecule, of the axial molecule respectively, and the total number of the active hydrogen groups is at least four. The invention further relates to a polyurethane prepolymer and a one-component polyurethane adhesive.