12 results about "Bridging oxygen" patented technology

The invention relates to the technical field of medical chemistry, in particular to a bridge oxygen site regulatively modified rhodamine anti-cancer fluorescent compound as well as a preparation method and application thereof. The invention develops the rhodamine anti-cancer fluorescent compound of which the meso site is functionalized by tetraarylethene and the bridge oxygen site can be regulated and modified, the fluorescent compound has adjustable red light-near infrared fluorescence emission and excellent fluorescence quantum yield, and the quantum yield can be as high as 99%; the fluorescent compound specifically targets mitochondria, and mainly inhibits growth of tumor cells by inducing para-apoptosis; under irradiation of 655 nm near-infrared laser, ferroptosis is further triggered, efficient treatment of tumor cells is achieved through chemical-photodynamic synergistic effect, and a new treatment thought is provided for overcoming tumor drug resistance.

Disclosed herein are modified zeolites and methods for making modified zeolites. In one or more embodiments disclosed herein, a zeolite may include a microporous framework comprising a plurality of micropores having diameters of less than or equal to 2 nm. The microporous framework may include at least silicon atoms and oxygen atoms. The modified zeolite may further include organometallic moieties each bonded to bridging oxygen atoms. The organometallic moieties may include a zirconium atom. The zirconium atom may be bonded to a bridging oxygen atom, and the bridging oxygen atom may bridge the zirconium atom of the organometallic moiety and a silicon atom of the microporous framework.

Modified zeolites may include a microporous framework including a plurality of micropores having diameters of less than or equal to 2 nm. The microporous framework may include at least silicon atoms and oxygen atoms. The modified zeolite may include a plurality of mesopores having diameters of greater than 2 nm and less than or equal to 50 nm, wherein the plurality of mesopores are ordered with cubic symmetry. The modified zeolite may include a plurality of zirconium hydride moieties each bonded to at least two bridging oxygen atoms, wherein a zirconium atom of the zirconium hydride is bonded to the bridging oxygen atom, and wherein the bridging oxygen atom bridges the zirconium atom of the zirconium hydride moiety and a silicon atom of the microporous framework.

The present invention provides crystalline compounds, solutions containing the compounds, methods for synthesizing the compounds, and methods for forming patternable coatings. [Solution] Formula R3Sn3(O2CR') 5-x (OH) 2+x A crystalline compound having (μ3-O) is provided, comprising three tin atoms having a central bridging oxygen atom, three tin-bridging carboxylate ligands, two non-bridging carboxylate ligands bonded to tin, and a tin-bridging OH ligand, wherein R comprises a hydrocarbyl group having 1 to 31 carbon atoms, optionally substituted with a heteroatom functional group.

The invention relates to a fast-charge type silicon monoxide negative electrode material and a preparation method and application thereof, and the preparation method of the fast-charge type silicon monoxide negative electrode material comprises the following steps: mixing a lithium lithiation reagent and a silicon monoxide material for preliminary chemical lithiation, and then preparing the fast-charge type silicon monoxide negative electrode material through electrochemical lithiation, the non-bridging oxygen content ([non-bridging oxygen] / Si) is greater than or equal to 3.26. The fast-charging type silicon monoxide negative electrode material provided by the invention can be used for a fast-charging type lithium ion battery, and an interface of lithium oxide and lithium silicate is pre-formed in a chemical lithiation process, so that side reaction between silicon monoxide and an electrolyte is relieved; the high non-bridging oxygen silicate generated in the electrochemical lithiation process is beneficial to forming a rapid lithium ion channel in the silicon monoxide material, so that the diffusion coefficient of lithium ions in the material is improved, and rapid lithiation and delithiation of the silicon monoxide are realized; the prepared silicon monoxide negative electrode has high energy density and also has excellent fast charging capability under high current density.

This invention discloses a method for improving the Raman gain coefficient of tellurate glass. By introducing Ga2O3 into a TeO2-BaF2-Y2O3 tellurate glass matrix, Ga ions enter the glass network and form [GaO4] tetrahedral structural units. These Ga ions then form a Te-O-Ga connection structure with the tellurium oxygen structural units through bridging oxygen bonds, thereby controlling the glass network structure and increasing the proportion of non-bridging oxygen. Raman spectroscopy results show that at 789 cm⁻¹... ‑1 The Te-O-Te vibration peak is enhanced at 480 cm⁻¹. ‑1 Vibrational characteristic peaks associated with the Te-O-Ga structure appear at a certain point. A peak intensity ratio evaluation function is constructed to quantitatively evaluate the glass structure, thereby obtaining tellurate glass materials with high Raman gain coefficients. Through structural tuning, the synergistic enhancement of the two main Raman vibrational modes can be achieved, thus significantly improving the Raman gain coefficient of tellurate glass.

This invention relates to a method, apparatus, and medium for simulating the placement of acidic sites in molecular sieves. The method includes: S1, generating all-silica molecular sieve nanoparticles; S2, randomly inserting a template molecule into a void, selecting the nearest silicon atom for isomorphic substitution of aluminum atoms, as the initial guessed structure; S3, obtaining the relaxed structure of the adsorbed state based on machine learning potential, and calculating the chemical potential change; S4, deciding whether to accept the current structure according to the Metropolis criterion; S5, if the cumulative number of consecutive rejections reaches a set threshold, ending the simulation and proceeding to S6; S6, after determining the aluminum placement, randomly removing a template molecule, randomly adding hydrogen to any bridging oxygen connected to the nearest aluminum framework, obtaining the relaxed structure and changing the position of the hydrogen, determining the placement of acidic sites based on the lowest energy, and repeating this process until all acidic sites are placed; S7, calculating and outputting physical property parameters. Compared with the prior art, this invention has the advantages of short processing time, high accuracy, and strong interpretability.

Modified zeolites may include a microporous framework including a plurality of micropores having diameters of less than or equal to 2 nm. The microporous framework may include at least silicon atoms and oxygen atoms. The modified zeolite may include a plurality of mesopores having diameters of greater than 2 nm and less than or equal to 50 nm, wherein the plurality of mesopores are ordered with cubic symmetry. The modified zeolite may include a plurality of hafnium hydride moieties each bonded to at least two bridging oxygen atoms, wherein a hafnium atom of the hafnium hydride is bonded to the bridging oxygen atom, and wherein the bridging oxygen atom bridges the hafnium atom of the hafnium hydride moiety and a silicon atom of the microporous framework.

This invention discloses a method for preparing a copper-alkaline earth metal bimetallic composite catalyst and its application in the electrocatalytic generation of multi-carbon products from CO2. Based on an in-situ atmospheric CO2 capture and spatial confinement strategy, this invention mixes copper and strontium salts in an alkaline liquid phase. Utilizing the carbonation kinetics of slow CO2 absorption at the gas-liquid interface, a rod-shaped SrCO3 framework is formed through self-assembly. Subsequently, through confined penetration and selective in-situ reduction by a reducing agent, a high-density Cu-O-Sr bridging oxygen bond is constructed. The structure is then freeze-dried to solidify the catalyst. In this catalytic material, the SrCO3 framework optimizes mass transfer and inhibits copper particle sintering, while the Cu-O-Sr interface stabilizes the metastable Cu through strong electronic interactions. + This significantly reduces the formation energy barrier of the key C-C coupling intermediate (*OCCHO), thereby greatly improving the Faraday efficiency and long-term stability of electrocatalytic CO2 to ethylene conversion.

The invention relates to the field of water electrolysis technology and fuel cells, and particularly provides an electrocatalyst with ordered spatial distribution and stable active sites and a preparation method and application thereof, and the preparation method comprises the following steps: preparing a defect-rich conductive carbon rod and synthesizing a Ru-O-Ce bridging structure induced electrocatalyst with coexistence of multiple Ru active sites. According to the invention, a novel Ru-O-Ce bridging structure electrocatalyst is synthesized by anchoring a Ce single atom and a Ru cluster on a defect-rich and oxygen-functionalized conductive carbon rod. According to the electrocatalyst, a strong Ce-O-Ru bond is formed between a Ru cluster and a Ce single atom by virtue of a bridging oxygen atom, so that spatial stable separation of different ruthenium valence states in the Ru cluster is realized, namely high-valence-state Ru (n +) is formed at a position close to the Ce-O-Ru bond, and zero-valence-state Ru (0) is formed at a position far away from the bond. According to the design, Ru (n +) and Ru (0) sites are optimal adsorption sites of hydrogen (H) and hydroxyl (OH) respectively. In addition, the unique Ru (0)-Ru (n +) combination also significantly improves the interface water transmission rate, thereby improving the efficiency of the whole water electrolysis and fuel cell system.

The invention belongs to the technical field of electro-catalytic water decomposition, and relates to a preparation method and application of a Ta-Co-MOF-P / NF composite material under the combined action of a built-in electric field and an asymmetric bridge oxygen bond. The method comprises the following steps: firstly, performing one-step solvothermal synthesis on a foamed nickel carrier to obtain a bimetal Ta-Co-MOF / NF precursor, and then performing low-temperature phosphating treatment to construct a Co-MOF and CoP heterogeneous interface on a substrate. And a built-in electric field formed by regulating and controlling the phosphorization degree and a Co-O-Ta asymmetric bridge oxygen bond formed by a proper Ta doping amount jointly change the water molecule configuration so as to improve the water decomposition activity. The catalyst can enhance the interaction force with water molecules, and the proportion of free water in the surface water molecule configuration is increased, so that active hydrogen species are easier to dissociate and release, thereby accelerating the alkaline HER reaction kinetics and mass transfer process. The material shows excellent HER catalytic activity and long-term stability in an alkaline environment.

Disclosed herein are modified zeolites and methods for making modified zeolites. In one or more embodiments disclosed herein, a modified zeolite includes a microporous framework including a plurality of micropores having diameters of less than or equal to 2 nm and organometallic moieties each bonded to bridging oxygen atoms. The microporous framework includes at least silicon atoms and oxygen atoms. The organometallic moieties include a metal atom and a ring structure including the metal atom, a nitrogen atom, and one or more carbon atoms. The metal atom may be bonded to a bridging oxygen atom, and wherein the bridging oxygen atom bridges the metal atom of the organometallic moiety and a silicon atom of the microporous framework.