47 results about "Steric effects" patented technology

The invention belongs to the technical field of polyfluorosiloxane synthesis, and provides a low-by-product polyfluorosiloxane controllable synthesis method which comprises the following steps: carrying out anionic ring opening polymerization on D3F by adopting a binary organic catalytic system, weakening the strong nucleophilicity of an active center based on hydrogen-bond interaction and steric effect, and inhibiting the occurrence of chain back-biting side reaction, so as to obtain the low-by-product polyfluorosiloxane. The polyfluorosiloxane with low content of by-product DnF (n is greater than or equal to 4), controllable structure and narrow molecular weight distribution is prepared. The polyfluorosiloxane with low byproduct content is catalyzed by the binary organic catalyst, the synthesis method is simple, the operation is convenient, the reaction condition is mild, the catalyst has good stability, large-scale production is easy, and further development of the polyfluorosiloxane in the field of high-end and harsh oil-resistant sealing materials can be promoted.

The preparation method comprises the following steps: carrying out reflux reaction on 4-bromo-1, 8-naphthalic anhydride and primary amine in an organic solvent to obtain an intermediate product, and carrying out C-N coupling reaction on the intermediate product, a compound containing a nitrogen secondary amine electron-donating group, alkali and a catalyst in the organic solvent to obtain the double-state emission fluorescent dye. The two-state emission dye is obtained. An amino auxochrome group of a bridge ring structure is modified in a 4-bromine-1, 8-naphthalimide parent, the fluorescence quantum yield of the dye in a polar solvent is improved through the characteristic that nitrogen atom lone pair electrons of the nitrogen-containing bridge ring structure are not easy to overturn, and pi-pi stacking, which is not beneficial to emission, of the dye is inhibited through the large steric hindrance effect of the bridge ring structure; the dye shows bright fluorescence emission in non-polar and polar solvents, also has a very strong fluorescence quantum yield in a solid state, and shows a quantum yield greater than 94% when the dye is dispersed in an EVA (Ethylene-Vinyl Acetate) film.

The invention discloses a preparation method of modified thermostable polycaprolactone, and belongs to the technical field of high polymer materials. The method comprises the following steps: selecting branched monomers such as 3-methyl-epsilon-caprolactone, inhibiting molecular chain slippage through a side group steric effect, and improving chain rigidity; a super-crosslinking metalloporphyrin porous material catalyst is adopted; (3) introducing a light / heat reversible group to an end group; and (4) optimizing process conditions and narrowing molecular weight distribution. Experiments show that the modified PCL obtained by the method is high in thermal decomposition temperature, small in melt flow rate change rate, low in yellowing index and high in tensile strength, and the comprehensive performance of the modified PCL is far better than that of the modified PCL obtained by a traditional method. The material is suitable for the fields of medical instruments, intelligent packaging and the like, and has the characteristics of high thermal stability, rapid shape recovery and controllable degradation.

The present invention discloses an organic electron acceptor containing a carbazole side chain and its application in solar cells. The organic electron acceptor containing a carbazole side chain has a structure shown in the following formula: #imgabs0# wherein R1 and R2 are independently a linear or branched alkyl group containing 1-18 carbon atoms, and A is an electron-withdrawing functional group. The present invention uses a non-fully fused ring structure based on trithiophene as the central conjugated skeleton of the organic electron acceptor, introduces a carbazole group as a side chain, prevents excessive elevation of the molecular HOMO energy level, and inhibits the internal rotation between the trithiophene rings connected by single bonds through its rigid large steric effect, thereby ensuring the planarity of the acceptor molecule, regulating the stacking between molecules, and simultaneously inhibiting the aromatic amine group from inducing the molecular skeleton to form a quinone structure, thereby improving the molecule's resistance to photooxidation.

The invention discloses an electron transport material, an electron transport layer and an organic electroluminescent device, and belongs to the technical field of organic electroluminescent materials. The electron transport material is a nitrogen-containing heterocyclic compound, and simultaneously contains a pyridine ring and a pyrimidine ring connected with the pyridine ring. By introducing a power supply group with a steric effect, the nucleophilicity of similar nitrogen atoms on a pyrimidine ring connected with a pyridine ring can be shielded, so that the coordination activation n-doping effect of a target chelated nitrogen atom and an n-type doping agent is enhanced, and the coordination stability in the coordination activation n-doping effect is promoted; by introducing a power-supplying group to modify the nitrogen-containing heterocyclic unit, the electron nucleophilicity of the nitrogen-containing heterocyclic unit is enhanced, so that the electron transport material can form a more stable complex with the n-type dopant, and the conductivity of the electron transport layer of the light-emitting device is improved; therefore, the driving voltage of the organic light-emitting device can be reduced, the efficiency of the device is improved, and the service life is prolonged.

The present invention discloses a wide-temperature range polyurethane elastomer and a preparation method thereof, wherein the wide-temperature range polyurethane elastomer is obtained by reacting a flexible segment with a low glass transition temperature, a diisocyanate and a large steric hindrance primitive, wherein the flexible segment with a low glass transition temperature is a flexible segment with a dihydroxyl end-capping terminal; and the large steric hindrance primitive is a metal ion-ligand coordination structure. The present invention utilizes diisocyanate to organically combine the flexible segment with a low glass transition temperature with a metal coordination structure with a large steric effect, weakening the hydrogen bond interaction between the polyurethane segments, thereby broadening the service temperature range of the polyurethane elastomer, significantly improving the cold resistance and heat resistance of the polyurethane elastomer, enabling the polyurethane elastomer to be normally used within a relatively wide temperature range (-60°C to 80°C), which is of great significance for promoting the application of polyurethane materials in extreme environments.

This invention discloses a chiral Pt metal-organic complex based on chiral Pt metal coordination, its preparation method, and its applications, belonging to the field of supramolecular chemistry. This method transfers chirality from the metal node to the tetraphenylethylene plane through metal coordination, forming a helical structure during crystallization to obtain a high-performance circularly polarized luminescent material. The introduction of a chiral binaphthyl group solves the problem of excessive distance between the chirality and the luminescent unit. Rigid coordination and steric effects are used to directionally induce a helical conformation in tetraphenylethylene, obtaining a single chiral molecule. Furthermore, this method connects the chiral group via covalent bonds and uses aggregation-induced emission molecules instead of traditional dyes to prepare materials with both a large luminescence asymmetry factor and high fluorescence quantum yield, expanding the application range of metal-organic cages.

The present application relates to a kind of carboxyl functional time-resolved fluorescent microspheres and its preparation method, belong to fluorescent microsphere technical field.The preparation method described in the present application includes the following steps, under acidic conditions, europium salt, lanthanide salt, beta-diketone ligand, synergistic ligand and bridging ligand occur in organic solvent, obtain binuclear rare earth complex;Binuclear rare earth complex, styrene monomer, acrylic monomer, initiator, polyvinylpyrrolidone, emulsifier occur in solvent dispersion polymerization reaction, obtain the carboxyl functional time-resolved fluorescent microsphere.The preparation method described in the present application directly coats dye in the microsphere interior in polymerization stage, need not consider time-resolved fluorescent dye steric effect, can select greater, but fluorescence intensity stronger, cannot be applied to swelling method binuclear rare earth complex as time-resolved fluorescent dye, so that the fluorescence intensity of time-resolved fluorescent microsphere is higher.

The present invention relates to a 2D passivation layer having significant electronic and spatial effects on the performance of a 3D / 2D perovskite solar cell.

The invention belongs to the technical field of gas membrane separation, and discloses a method for customizing nano channels by grafting ether oxygen groups in COFs membrane pores. Phenolic hydroxyl groups of COFs and brominated OE are subjected to a Williamson cross-linking reaction, ether oxygen chains of different lengths and types are introduced to accurately regulate and control the pore size of the COFs membrane, the ether oxygen chains of different lengths occupy the space in pores, a steric effect is formed, large CO2 molecules are prevented from passing through the membrane, and small H2 is allowed to pass through. Meanwhile, the existence of ether bonds greatly enhances the adsorption of CO2, inhibits the diffusion of CO2, realizes the coordinated regulation and control of the steric hindrance effect and dynamic screening in membrane pores, and the introduction of flexible ether oxygen groups does not significantly reduce the permeability of hydrogen under the condition of high-density grafting, thereby realizing the efficient separation of H2 / CO2. The method is simple in preparation process, stable in structure and suitable for most phenolic hydroxyl COFs.

The invention discloses a small molecule material based on condensed ring tert-butyl pyrene, a preparation method thereof and application of the small molecule material in an OLED (Organic Light Emitting Diode), and belongs to the technical field of organic photoelectric materials. The material is constructed by condensed ring tert-butyl pyrene, pyrene and carbazole are hybridized to form a novel carbazole condensed ring derivative with a large molecular conjugated structure and high stability, and the large conjugated plane structure can enhance the intermolecular stacking property, reduce the hole transport energy barrier and improve the hole mobility; due to the stereo steric effect of tert-butyl, excessive aggregation of molecules can be avoided, and charge transfer traps and non-radiative recombination are reduced; the phosphoric acid anchoring group can optimize interface bonding with the ITO anode, and the anode work function is matched to reduce the hole injection barrier. When the material is used as a core component of an OLED hole transport layer, the charge transport efficiency can be effectively improved, material crystallization and interface charge recombination in device operation can be inhibited, the brightness, efficiency and long-term stability of an OLED device can be remarkably improved, and the material has important significance in promoting the application of an OLED in the fields of high-end display and illumination.

The invention relates to acylhydrazone molecules capable of activating solid-state fluorescence or photochromism and preparation and application thereof, in the molecular structure, by changing a substituent R on a-N (R)-group on one side of benzoyl hydrazine, the conformation and accumulation mode of the molecules can be adjusted, so that selective activation of the fluorescence or photochromism property of the acylhydrazone molecules in a solid state is realized. When the substituent R is-H, the molecular conformation is planar, and the intermolecular accumulation is tight. In a solid state, the compound shows an excitation wavelength dependent fluorescence property, and when the wavelength of excitation light is changed, the fluorescence color is switched between blue and green. When the substituent R is-CH3, due to the steric effect of-CH3, the molecular conformation is distorted, and the accumulation among molecules becomes more loose. When ultraviolet light and visible light are alternately used for irradiation in a short time, the color of the powder can be rapidly switched between white and orange. The method provided by the invention is not influenced by R'on a benzene ring, and shows good universality.

The invention provides a diphosphine ligand modified rhodium catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysts. The rhodium catalyst modified by the diphosphine ligand comprises an active metal component and a diphosphine ligand subjected to antioxidant modification treatment, the active metal component is Rh, and the diphosphine ligand is one or more of 2, 2 '-bis (diphenylphosphine) biphenyl, 1, 1'-binaphthyl-2, 2 '-diphenylphosphine, 4, 5-bis (diphenylphosphine-9, 9-dimethyl xanthene or (S)-DTBM-SEGPHOS. A large-steric-hindrance diphosphine ligand is selected to inhibit generation of side reactions and improve selectivity of glycolaldehyde through steric hindrance, coordination configurations of formaldehyde and CO are limited through a stereo effect, linear insertion of a C-C bond is promoted to generate glycolaldehyde, the diphosphine ligand subjected to antioxidant modification treatment can further enhance oxidation resistance of a ligand framework, and the selectivity of glycolaldehyde is improved. The thermal stability is improved.

The present application relates to the technical field of process chemicals, and discloses a positive photoresist stripping solution and a preparation method thereof, which comprises the following steps: step one, mixing monoethanolamine, catechol and sorbitol at 60-65 DEG C and constant temperature stirring to prepare a structure precursor with a dynamic viscosity of 350-500 mPa s; step two, mixing dimethyl sulfoxide and dipropylene glycol methyl ether and cooling to 5-10 DEG C to prepare a low-viscosity cold trap continuous phase, and establishing a temperature gradient of at least 50 DEG C and a viscosity gradient of 70 times with the precursor; and step three, shearing the precursor into the continuous phase at a controlled rate, and blocking the hydrogen bond network dissociation by using temperature difference and shear force, wherein the present application uses a non-equilibrium state thermal / rheological process to construct metastable amine clusters, reduces the corrosion to the metal substrate through physical steric effect, and realizes the decoupling of stripping efficiency and material compatibility.

The present invention provides a method for screening anti-nonspecific adsorption reagents for FET biosensors. By combining reagents with different terminal functional groups, charges and hydrophilicity, and through the synergistic effects of hydrogen bonds, steric effects and electrostatic repulsion, multi-attribute and multi-ratio anti-nonspecific adsorption reagents for target detection systems are screened. The process is controllable and highly targeted, and anti-nonspecific adsorption reagents with excellent effects are screened more accurately for target detection systems, providing guarantees for subsequent detection. The anti-nonspecific adsorption reagents screened by the method of the present invention can improve the hydrophilicity of the interface, produce steric effects, and enhance electrostatic repulsion through the interaction between the different terminal functional groups of the thiol compound reagents, thereby reducing the adsorption of non-targets in the target detection system and showing strong anti-fouling performance. The modified FET biosensor has a wider linear detection range and an extremely low detection limit, strong anti-interference ability, high sensitivity, and fast response time.

The application provides resin-based hard carbon based on the steric hindrance effect of aromatic groups and a preparation method and application thereof, and belongs to the technical field of negative electrode materials of sodium ion batteries. The application adopts aldehyde monomers containing aromatic groups to be condensed with phenolic monomers to obtain a phenolic resin hard carbon precursor, and then sequentially undergoes post-curing and high-temperature pyrolysis carbonization to obtain resin-based hard carbon based on the steric hindrance effect of aromatic groups. The aromatic groups contained in the side chain of the phenolic resin can change the steric hindrance of the polymer and construct pi-pi stacking, improve the internal free volume of the resin and the rigidity of the molecular chain; and then can effectively inhibit the excessive graphitization of the carbon layer in the subsequent carbonization process, and promote the formation of a large number of closed pores. The steric hindrance strategy of the aromatic groups provided by the application has a positive effect on the regulation of the microstructure of the hard carbon material, and the resin-based hard carbon material as the negative electrode of the sodium ion battery exhibits high specific capacity and first coulomb efficiency, and also has good rate performance and cycle stability characteristics.

The invention discloses a metal complex, an intermediate and a catalyst composition with a bicycloalkyl-fused pyridine skeleton. The pyridine ring at the 4-position of the metal complex skeleton is a phenyl group, and this phenyl group forms a specific spatial structure with the cycloalkyl groups on both sides, endowing the complex with special steric hindrance, and capable of catalyzing ethylene polymerization to obtain polyethylene wax with a low molecular weight (2.0 - 4.0 kg·mol-1) and a narrow distribution (mostly less than 2.0). Compared with other substituents other than phenyl at the 4-position of the pyridine ring of similar complexes, the steric effect of the phenyl substituent has a stronger protective effect on the active center, promotes the chain growth reaction during polymerization, and greatly improves the catalytic activity.

The invention belongs to the field of organic photoelectric materials, and particularly relates to a micromolecule hole transport material with a functionalized periphery and application of the micromolecule hole transport material in the field of photoelectric devices such as perovskite solar cells. The molecular structure of the micromolecular hole transport material compound is shown as a general formula (I). Aiming at the problems of strong self-aggregation, weak passivation capability and the like of a traditional micromolecule self-assembly layer hole transport material, the invention of introducing a functional conjugated group to the periphery of a conjugated main skeleton is provided, the steric effect and cation-pi passivation effect of a peripheral functional group can be cooperated, the film-forming characteristic of a micromolecule self-assembly layer is improved, and the hole transport material has a good application prospect. And the interface defect passivation capability is enhanced. The micromolecular hole transport material based on the periphery functionalization can be used as an interface modification material to be applied to the fields of perovskite solar cells, organic solar cells, perovskite / organic electroluminescent devices, perovskite / organic photoelectric detectors and the like, and the efficiency and the stability of the devices are improved at the same time. Formula (I).

The present application relates to the technical field of biological medicine material and tissue damage repair preparation, and discloses a recombinant collagen skin barrier repair composition with the effect of ectoine, which comprises recombinant type III collagen, ectoine and deionized water as the balance in percentage by mass; the recombinant type III collagen is composed of components with specific proportions of long and short chains; the hydrated matrix is constructed by stirring the ectoine aqueous solution, and the collagen is added to anchor the side chain of the protein peptide chain in the matrix to form a linear extension conformation; the present application utilizes the physical steric effect of the ordered hydration structure induced by ectoine to block the environmental ion from stripping the surface-bound water of the protein, maintains the conformational stability of the collagen under the high ion strength of the inflammatory exudate, forms a dense net structure at the skin interface, and further reduces the transdermal water loss rate and enhances the residence of the active components at the damaged interface.

The present application relates to a kind of magnetic bead complex for enriching mRNA and its application, belong to biotechnology field.The present application provides a kind of magnetic bead complex for enriching mRNA, including magnetic bead, interval arm, primer and oligodT, wherein, primer is coupled on magnetic bead by interval arm, oligodT is connected by primer with interval arm, interval arm is C chain and / or base T, primer is used to amplify target mRNA and is combined on the cDNA of magnetic bead after reverse transcription, oligodT can be specifically combined with target mRNA;The magnetic bead complex for enriching mRNA is provided with interval arm between primer and magnetic bead, on the one hand, can reduce the steric effect when in situ cDNA pre-amplification, enhance the efficiency of amplification, on the other hand, interval arm makes mRNA enrichment using the magnetic bead complex, can be in the case of magnetic bead reverse transcription, while also can carry out PCR amplification reaction.

The application belongs to the field of separation and purification, and relates to a fixed phase for OPO column chromatography separation and purification, a preparation method and a separation and purification method and an OPO product. The structural formula of the fixed phase is: The fixed phase is used for column chromatography separation and purification of OPO, and can effectively separate OPO and OOP. Through the pi-complexation of silver ions and double bonds and the pi-pi stacking ability of the triazine structure, the fixed phase can distinguish the hydrophobicity and steric effect of the two isomers, so that high-efficiency separation is realized.

The invention discloses a quinone derivative, a preparation method and an application of the quinone derivative in an aqueous organic flow battery. A sulfonic acid group is modified on a pyrene mother nucleus with an expanded conjugated structure through sulfonation reaction, and the 8-position sulfonic acid group is substituted by hydroxyl through hydrolysis; the precursor is prepared into an electrolyte, and then a reversible electric pair is synthesized through electrochemical synthesis, wherein reversible transfer of two electrons can be realized by an active electric pair with substituted 6-site and 8-site. The invention further provides a strategy for improving electrochemical synthesis selectivity based on charge compensation and a steric effect, 1-hydroxypyrene is taken as a substrate, a tertiary ammonium group is modified at the site 2 through a low-cost Mannich reaction, and then the substrate is subjected to electrochemical synthesis to serve as a reversible couple, so that the utilization rate of two electrons and the electron concentration are further improved. The flow battery assembled by using the electrolyte prepared from the two types of couple with the conjugate expansion structure has the advantages of low cost and high energy density, and has ultra-long cycle life and relatively high battery efficiency.

The invention belongs to the cross technical field of energy electrochemistry and biosensing, and relates to a ratio detection sensor, in particular to a construction method and application of a ratio type biofuel cell self-energized sensor, a conductive substrate containing a loaded gold nano bowl (pAuNB) is used as an anode; a bilirubin oxidase (BOD) modified carbon nanotube / gold composite electrode is used as a cathode; tiO2 (at) Au is fixed on the surface of the electrode through a target object to form a photocatalytic channel, and light current output is regulated and controlled through an optical switch. The construction method of the ratio-type PA-EBFC self-energized sensor is provided for the first time, dynamic balance of photoelectric response and steric effect of TiO2 (at) Au is achieved by regulating and controlling the loading amount of AuNPs in TiO2 (at) Au, and construction of the ratio-type PA-EBFC self-energized sensor is achieved.

The application provides a kind of based on sulfur phosphorus heterocyclic acceptor and nitrogen-containing heterocyclic donor compound, in the compound, sulfur phosphorus heterocyclic acceptor as parent, with nitrogen-containing heterocyclic substituent group.It has thermal excitation delayed fluorescence light emitting performance, the moderate electron-withdrawing ability of phosphine oxide group in the molecule is used to optimize the ICT effect of the system, improve RISC efficiency, while using the steric effect of phosphine oxide group inhibits the exciton quenching caused by excited state structure relaxation and intermolecular interaction, so as to improve the photoluminescence quantum yield, luminous efficiency and device stability of blue light TADF light emitting material.

The present invention discloses a β-FeOOH material and a preparation method thereof, and belongs to the field of functional materials and their preparation technology. The present invention dissolves an iron salt in water to obtain an iron salt solution, then adds an organic base solution to stir, and obtains a mixed solution; after aging the mixed solution, a hydrothermal reaction is carried out, followed by centrifugal washing and drying to obtain a β-FeOOH material. The present invention replaces an inorganic base with an organic base to prepare β-FeOOH, utilizes the groups present in the organic base structure to increase the steric effect, and participates in the reaction as an alkali source, which not only plays the role of a certain dispersant, but also effectively solves the problem that β-FeOOH particles are easily aggregated with each other, and can also enhance the stability of β-FeOOH itself, with a high degree of crystallinity and better adsorption performance.

The invention relates to the technical field of organic electroluminescent materials, in particular to a boron-containing multiple resonance type thermal activation delayed fluorescence material and an organic electroluminescent device thereof. The boron-containing multi-resonance type thermal activation delayed fluorescence material provided by the invention has the core of a spirofluorene locking strategy, and compared with the prior art, the boron-containing multi-resonance type thermal activation delayed fluorescence material has the advantages that firstly, a spirofluorene unit is covalently connected with a B / N doped multi-resonance core through a rigid spirofluorene bridge, and a pi conjugated system is expanded on the premise of not damaging an MR resonance structure, so that red shift of emission is realized; secondly, due to the three-dimensional space steric effect of the spiro-carbon unit, on one hand, molecular vibration and conformational change are limited, relaxation of an excited state structure is inhibited, and a narrow spectrum is maintained; on the other hand, pi-pi accumulation among molecules is hindered, aggregation-induced quenching is effectively inhibited, and wide doping concentration stability is achieved; and the spiro carbon bridge enhances the molecular planarity and rigidity, improves the thermal stability of the material, and improves the stability of the device.

The invention relates to the technical field of photocatalytic materials and sterilization, in particular to an electron donor-acceptor polymer, a film and a preparation method and application of the electron donor-acceptor polymer. The invention provides an electron donor-acceptor polymer. A quinone group in an electron acceptor of the electron donor-acceptor polymer can accelerate photoinduced electron transfer and enhance photocatalytic activity; a substituted or non-substituted alkyl / alkoxy chain on the electron donor generates a steric effect, so that close stacking of molecules is inhibited, the specific surface area is increased, and the catalytic performance is optimized; the polymer is of a linear structure due to an electron bridge disubstitution mode of the electron donor, so that thallus infiltration is facilitated, and the sterilization efficiency is enhanced. The polymer can expand light absorption to a visible light region, promote photogenerated charge separation and transfer, reduce carrier recombination, improve sterilization efficiency and improve cycle stability. The film prepared based on the polymer not only can efficiently kill microorganisms such as bacteria, but also has excellent cycle stability, and the application feasibility of a photocatalytic disinfection technology is improved.

This application relates to the field of chemical technology and discloses a heterogeneous catalyst and a method for preparing thiols. The heterogeneous catalyst comprises an active component and an organophosphorus polymer ligand. The organophosphorus polymer ligand forms a coordination bond with the active component through a phosphorus element in its chemical structure. The active component includes at least one of Co and Rh elements. The organophosphorus polymer ligand is formed by polymerizing and sulfiding an organophosphorus monomer containing a carbon-carbon double bond. The sulfur content is 1%-20% based on the mass of the heterogeneous catalyst. The heterogeneous catalyst of this application exhibits high utilization of the active component and is not easily lost. The phosphorus ligand has a significant steric effect, which can improve the stereoselectivity of the target product. Simultaneously, a certain amount of sulfur can increase the binding force between the catalyst and H₂S, thereby improving the thiol yield.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a biphenyl urea skeleton-based bimetallic catalyst, and a preparation method and application thereof. The bimetallic catalyst has a structure as shown in a formula 1, adopts a biphenyl urea skeleton, and is connected with group urea through carbon atoms, so that the structure of the bimetallic catalyst complex is more stable, and compared with the structure of a traditional catalyst, the bimetallic catalyst obtains a better spatial configuration; the introduction of urea enables the distortion degree of bond length and bond angle to be better coordinated with metal, the pocket-shaped structure better promotes the occurrence of polymerization reaction and the insertion of chain, and meanwhile, the steric effect and power supply capability of the ligand are adjusted by changing substituent groups, so that the polymerization performance of the metal catalyst is regulated and controlled; the molecular weight, molecular weight distribution, terminal double bond content, branched chain insertion rate and other properties of the polymer can be adjusted by selecting the types and the dosages of R1-R3 and metal salts in the bimetallic catalyst, so that the polymer can be applied to different fields.