1340 results about "Supermolecule" patented technology

A composition includes at least one organic compound of a first type of the general formula I and at least one organic compound of a second type of the general structural formula II, wherein Core in formula I is a conjugated organic unit capable of forming a rigid rod-like macromolecule, Gk is a set of ionogenic side-groups providing solubility of the organic compound of the first type in a solvent and give rigidity to the rod-like macromolecule; and wherein Sys in formula II is an at least partially conjugated substantially planar polycyclic molecular system capable of forming board-like supramolecules via π-π-interaction, and X, Y, Z and Q are substituents. The composition is capable of forming a lyotropic liquid crystal solution, which can form a solid retardation layer of biaxial type substantially transparent to electromagnetic radiation in the visible spectral range. The type and degree of biaxiality of the said optical retardation layer is controlled by a molar ratio of the organic compounds of the first and the second type in the composition. An optical film comprising a solid retardation layer formed of the composition, a method of producing the optical film, and a vertical alignment liquid crystal display using said retardation layer are also provided.

The invention relates to a preparation method of a biodegradable diaphragm for promoting regeneration of periodontal tissue, belonging to the field of biological regeneration medicine. In the invention, polylactic acid, polycaprolactone, polylactic acid-glycollic acid copolymer, collagen, modified chitosan and other biodegradable synthetic polyester polymers or natural biodegradable high molecular materials are used as raw materials to prepare a thin-film material with a nano structure through the electrostatic spinning process, and then, various growth factors are loaded on the thin-film material through the supermolecule loading technology. The diaphragm for reparative regeneration of the periodontal tissue, which is prepared by the method of the invention, has good biocompatibility and can realize the purposes of inhibiting inflammation and inducing regeneration of the periodontal tissue through the controlled release of the loaded growth factors.

The invention discloses a copolymer with temperature resistance and water solubility and the preparation method and application thereof, which is characterized in that: 20 portions of acrylic amide, 0.1 to 10 portions of anion monomer or/and cation monomer, 0.05 to 3 portions of fluorine-containing styrene or/and perfluoroalkyl styrene hydrophobic monomer, 0.5 to 60 portions of surface active agent and 50 to 700 portions of deionized water are put into a three-necked reaction bulb; after the solution pH is regulated to be equal to 2.5 to 9 and N2 is connected for 30 minutes, 0.001 to 0.2 portion of an evocating agent of persulfate is added under temperature of 20 to 70 DEG C, reacting for 6 to 36 hours, and PATF is prepared. Then water is used for diluting so as to prepare PATF concentrated solution, thus obtaining a copolymer that has medium molecular weight and water solubility, is high-temperature resistant, has an ability of molecular association and can be used in high temperature and high salinity reservoir. The copolymer is prepared into aqueous solution with a mass concentration of 0.3 to 3g/L and a surface-active-agent concentration of 0.01 to 4mmol/L, which is put in a blending container with a dasher and is stirred even at room temperature to prepare a polymer oil-displacing agent which is high-temperature resistant, high tackifying and anti-sharing and has excellent aging resistance under high salinity and the temperature of 110 DEG C. The prepared oil-displacing polymer has excellent solution properties owing to the supermolecular structure formed by the association between molecules of fluorine-containing cinnamene or/and alkylbenzene hydrophobic groups, thus having favorable application prospects in high temperature and high salinity reservoir exploitation.

The invention discloses a method for in-situ preparing antibacterial supermolecule aquogel. The method comprises the following operation steps: silver nitrate crystal and polyethyleneglycol-polypropylene glycol-polyethyleneglycol triblock copolymer solution are mixed and stirred to obtain mixed solution; the steps of stirring the mixed solution for 15 minutes and ultrasonically dispersing the mixed solution for 5 minutes are alternatively carried out for 2-4 hours to obtain nano silver sol; and the nano silver sol and Alpha-cyclodextrin solution are mixed, stirred and stands at the room temperature to obtain hydrogel. The hydrogel can be used for preparing injectable drug carriers. The invention has the advantages of simple operation, adjustable gel strength and the gelation time, room temperature forming, no involvement of chemical cross linking reaction and the usage of organic solvent, favorable biocompatibility and antibacterial property of obtained gel, and the like and is prospective to be widely applied in the field of biomedical engineering materials.

The invention discloses a graphene/hyaluronic acid assembly taking cyclodextrin as a medium. The graphene/hyaluronic acid assembly is a nano supermolecule assembly synthesized based on beta-cyclodextrin-modified graphene and adamantine-modified hyaluronic acid, wherein graphene is modified by beta-cyclodextrin; by virtue of strong host-guest interaction between beta-cyclodextrin and adamantine, graphene and hyaluronic acid are combined together to form the supermolecule assembly. The graphene/hyaluronic acid assembly has the advantages that the supermolecule assembly greatly improves stability and biocompatibility of the cyclodextrin-modified graphene under physiological conditions; by utilizing targeted recognition action of hyaluronic acid on tumor cells, the supermolecule assembly can selectively kill the cancer cells, and has anti-cancer activity higher than that of pure drug camptothecin; the targeted drug transmission system is simple in preparation process, easy to implement and low in material cost, and has potential application prospect in clinic treatment of cancers.

The invention designs and synthesizes a novel supermolecular sensor P5-B1. Pillar [5] arene P5 is adopted as a subject, a pyridine functionalized naphthalene diformyl derivative B1 is adopted as an object, the subject and the object are complexed in a H2O-DMSO system, the object B1 penetrates into a molecular cavity of the object P5 so as to form the supermolecule P5-B1, the supermolecular sensor can be coordinated with Fe3+ to form a supermolecular sensor complex P5-B1Fe, and fluorescence quenching is carried out at the same time, so that supermolecular sensor can be applied in single selective fluorescent recognition of the Fe3+, and the lowest limit of detection is 5.01*10<-7>. F- is added in the sensor complex P5-B1Fe, and green fluorescence of the sensor complex is recovered, so that the F- can be efficiently selected and recognized, and the lowest limit of detection is 4.07*10<-6>. In addition, competitiveness distinguishing complex can be also used as an 'ON-OFF-ON' type fluorescence switch, and the recognition performance has important application value in the ion recognition field.

The invention belongs to the field of functional materials, and discloses a mesoporous graphite phase carbon nitride and a preparation method and application thereof. Ammonium salt is utilized as a pore-forming agent and a hydrothermal inducer and melamine is taken as a precursor, so that controllable mesoporous g-C3N4 is prepared. Ammonium salt is hydrolyzed in water, an acidic environment is provided, melamine is partially converted into cyanuric acid under the acidic condition, melamine and cyanuric acid are connected through hydrogen bonds between molecules to form supermolecules, the supermolecules are then roasted, cyanuric acid in the supermolecules is decomposed in the process of roasting to produce a great deal of gas (serving as a bubble template), meanwhile, voids are left over,so that rich pore structures are produced in the process of forming carbon nitride by the pyrocondensation polymerization of melamine, ammonium chloride which remains after hydrothermal treatment also plays the role of the bubble template, and ultimately, the mesoporous graphite phase carbon nitride with high catalytic performance is obtained.

The invention designs and synthetizes a supermolecule polymer framework material. The supermolecule polymer framework material is formed through self assembly in cyclohexanol by using naphthalimide functionalized pillar [5] arene as a subject and bilateral quaternization pillar [5] arene as an object, wherein the mole ratio of the subject to the object is 1:1. Through competitive coordination mechanism, the supermolecule polymer framework material (SOF-AP5-MJP5) and a metal supermolecule polymer framework material (M-SOF-AP5-MJP5) can respectively realize continuous response and high-sensitivity detection to Fe<3+> and H2PO4<->; the recognition performance has important application values in the field of ion recognition.

The invention discloses a synthesis method for increasing the Pd content of a metal organic framework based on Zr(IV) ions. The method comprises the following steps: performing a coordination polymerization reaction between an organic ligand (I) and ZrCl4, and performing post-synthesis modification of the product, wherein the post-synthesis modification comprises the following specific steps: enabling a coordination polymerization reaction product, 2-pyridylaldehyde or salicylaldehyde and a catalyst formic acid in a molar ratio of 1:(1-4):(0.1-0.3) to react in an organic solvent; performing centrifugal washing of the product and dispersing in an organic solvent; adding palladium nitrate in a molar ratio of 1:(0.8-1.2); after the reactions, centrifuging and drying to obtain powder; dispersing the obtained powder into water; adding sodium borohydride in a molar ratio of 1:(0.5-1.5); and after the reactions, centrifuging, washing and drying to obtain the product. In the invention, the synthesized compound is an organic-inorganic composite supermolecular material and has a metal organic framework which is easy to operate and low in cost and has nanoscale particle size; and the compound has very high efficiency when being used as a catalytic material for benzyl alcohol oxidation and benzaldehyde condensation.

The invention provides a conjugated metal polymer photoelectric material with functionalized polarity side-chain radicals and an application thereof. The material has conjugated main chains and functionalized polarity side-chain radicals, wherein the conjugated main chains contain Hg metal atoms; the functionalized polarity side-chain radicals comprise a high-polarity radical A with water-alcohol solubility. Due to the existence of the metal atoms in the conjugated main chains, the conjugated polymer material has the mutual metal-metal supermolecule function, and has a good current-carrier transferring characteristic; due to the existence of the radical A, the conjugated polymer material can be prepared by using a high-polarity solvent such as alcohol, can remarkably decrease the work function of a stable metal electrode, has good functions of suction filtration, injection and the like on enhanced high work function metal electrode electrons, and is applicable to manufacturing of complex multi-layer organic/polymer photoelectric devices. The conjugated metal polymer with the functionalized polarity side-chain radicals can be used as an electronic suction filtration/transferring layer to be applied to photovoltaic, light-emitting organic/polymer photoelectric devices to improve the properties of the devices.

The invention provides a preparation method and application of a temperature and oxidant dual stimuli responsive nano-aggregate. According to the invention, the redox inclusion principle of beta-cyclodextrin (beta-CD) and ferrocene (Fc) and the temperature sensitive properties of the polymer poly(N-isopropylacrylamide) (PNIPAM) are utilized to connect PNIPAM-beta-CD with the end containing a beta-CD host group to hydrophilic polyethylene glycol (mPEG-Fc) with the end modified by an Fc guest group in a water solution through a host-guest recognized noncovalent bond, thus forming a supramolecular complex mPEG-Fc/PNIPAM-beta-CD. When the temperature is higher than the LCST (lower critical solution temperature) of PNIPAM, the macromolecular adduct can further gather in water to form a micellar structure. Micelle formation and disintegration can be realized by adjusting the solution temperature and adding an oxidant. cytotoxicity assessment experiments find that the supramolecular complex has very good biocompatibility. The supramolecular micelle packing the anticancer drug doxorubicin has very good effect in inhibiting A549 tumor cell growth. The preparation method of the nano-aggregate is simple, environment-friendly and economical, and the nano-aggregate has great application value in the field of biological medicine.

The invention discloses an ultramolecular gelator MP5 based on naphthalimide functional column 5 arene. The gelator can form organic ultramolecular gel MP5-G with yellow aggregation induced fluorescence in a cyclohexanol solution under the action of pi-pi; the organic ultramolecular gel can be used for detecting Fe<3+> with high selectivity and super sensitivity: when ions such as Fe<3+>, Hg<2+>,Ag<+>, Ca<2+>, Cu<2+>, Co<2+>, Ni<2+>, Cd<2+>, Pb<2+>, Zn<2+>, Cr<3+> and Mg<2+> are added into the MP5-G, fluorescence is quenched only by the Fe<3+>, and stable metal gel MP5-FeG is formed. When L-Cys is added into the fluorescence-quenched metal gel, the L-Cys and the Fe<3+> are complexed to recover the pi-pi action again among the MP5-G, so that aggregation induced fluorescence appears again,and continuous reversible ultrasensitive detection of the Fe<3+> and the L-Cys is realized.

The invention discloses a graphite alkenyl supermolecule hybridization material with strengthened heat stability and a preparation method thereof. The graphite alkenyl supermolecule hybridization material with strengthened heat stability is in a nanometer structure constructed on the basis of supermolecule self-package technique. The preparation process includes three steps of graphite oxide preparation, reduced graphene oxide preparation and graphite alkenyl supermolecule hybridization material preparation. Relative to unmodified reduced graphene oxide, the hybridization material combined inthe method can be easily dispersed in organic solvent with low polarity and the heat stability is greatly improved. Simultaneously, the hybridization material can serve as a nanometer material to improve the heat stability of a polymer composite material. The combining steps are simple and high in efficiency, so that the hybridization material can be prepared in a large amount and has better application prospect and economical benefit.