276 results about "Monoclinic crystal system" patented technology

The invention discloses an inorganic-organic hybrid compound crystal and a preparation method thereof, and belongs to the technical field of organic-inorganic hybrid materials. The preparation method comprises the following steps: mixing raw materials containing hydroiodic acid, organic cage molecules RCC3 and a lead source with a solvent, and carrying out solvothermal reaction to obtain the inorganic-organic hybrid compound crystal. The chemical formula of the prepared inorganic-organic hybrid compound crystal is ({H18 [C72H108N12] 2 [(Pb10I36)]}. 2I), wherein [C72H108N12] is RCC3 acidified by hydroiodic acid, the crystal has a supramolecular three-dimensional structure assembled by a [Pb5I8] 3-anion cluster unit and a protonated RCC3 molecular cage through electrostatic and hydrogen-bond interaction, and belongs to a monoclinic system, and the space group is P21. The crystal structure is a metal halide-based organic-inorganic hybrid crystal constructed by taking an organic molecular cage as nitrogen-containing cations and lead iodide for the first time.

The invention discloses an ytterbium ion doped samarium calcium oxide borate nonlinear optical crystal and a preparation method and application thereof.The crystal belongs to a monoclinic system, an m point group and a Cm space group, the chemical formula is YbxSm1-xCa4O (BO3) 3, the chemical formula is 0.1-0.99, the cell parameters are as follows: a = 8.064-8.110, b = 16.045-16.062, c = 3.570-3.600, alpha = gamma = 90 degrees and beta = 100.80-101.38 degrees, and the ytterbium ion doped samarium calcium oxide borate nonlinear optical crystal has good crystal quality and transmittance as high as 87% and can be applied to high-power laser devices, such as laser devices, laser devices, laser devices and the like. The method is widely applied to the fields of photoetching machines, laser medical treatment, laser cutting and the like, and the preparation method has the advantages of being low in cost, high in quality, stable in performance, suitable for large-scale production and the like.

The invention relates to an aminoguanidine oxalate second-order nonlinear optical crystal material and preparation and application thereof, the chemical formula of the crystal material is (CN4H7) + (C2O4H)-, the crystal material belongs to a monoclinic system, the space group is P21, the cell parameters are # imgabs0 # and # imgabs1 #, alpha is equal to 90 degrees, beta is equal to 95-100 degrees, gamma is equal to 90 degrees, and Z is equal to 2. The powder frequency-doubled effect of the nonlinear optical crystal (CN4H7) + (C2O4H)-disclosed by the invention under the irradiation of 1064nm laser is about 1.0 time of that of a KH2PO4 (KDP) crystal, and phase matching can be realized. In addition, the crystal material has the advantages of being short in ultraviolet absorption cut-off edge (290 nm), easy to grow and the like, and has important application value in the photoelectric conversion fields of stereolithography, solid-state lasers, optical communication, optical parametric amplifiers, optical parametric oscillators, laser frequency converters and the like.

The invention belongs to the crossing field of nano materials and coordination chemistry, and particularly relates to a chiral silver-palladium nano-cluster, a preparation method thereof and application of the chiral silver-palladium nano-cluster in aggregation-induced emission and circular polarization emission. The chemical formula of the chiral silver-palladium nano-cluster is C174H180Ag14Cl4P12Pd, the chiral silver-palladium nano-cluster belongs to a monoclinic system, and the chiral silver-palladium nano-cluster has an atomic-scale accurate structure, is small in size (1.82 nm) and good in monodispersity. The chiral nano-cluster shows good chiral optical activity, has an emission peak at 662 nm, has significant chiral optical activity characteristics and circular dichroism signals, also has two characteristics of aggregation-induced emission and circular polarization emission, has an absorption asymmetric factor and an emission asymmetric factor as high as 8.2 * 10 <-4 > and 2.2 * 10 <-3 > respectively, and has important application value.

The invention provides a cobalt metal organic framework material for separating hexafluoropropylene / octafluoropropane mixed gas as well as a preparation method and application thereof. The chemical formula of the cobalt metal organic framework material is [Co3 (OH) (C6H3O2NCl) 5 (H2O)], the cobalt metal organic framework material belongs to a monoclinic system, the space group is P21 / c, and the unit cell parameters are as follows: # imgabs0 # alpha = 90 degrees, beta = 92.7-92.8 degrees, gamma = 90 degrees and Z = 4; wherein OH represents a hydroxyl group; c6H3O2NCl represents 3-chloroisonicotinic acid without a hydrogen atom of a formic acid group; h2O is a water molecule. The preparation method comprises the following steps: placing cobalt nitrate hexahydrate, 3-chloroisonicotinic acid and an organic solvent in a glass bottle, adding fluoboric acid, and reacting at 363-383 K to obtain the cobalt metal organic framework material. The cobalt metal organic framework material can be used for separating hexafluoropropylene / octafluoropropane mixed gas, so that pure octafluoropropane gas is obtained.

The invention relates to a high-reflectivity high-entropy rare earth phosphate radiation refrigeration pigment, the high-entropy rare earth phosphate radiation refrigeration pigment has a monazite phase with a monoclinic system structure, the chemical formula of the pigment is (A1xA2yA3zA4uA5v) PO4, A1, A2, A3, A4 and A5 are any five rare earth cations of La, Ce, Yb, Gd, Nd and Eu, the cations are in an equimolar ratio, and x, y, z, u and v meet the condition that x + y + z + u + v = 2. Meanwhile, the invention also discloses a preparation method of the high-entropy rare earth phosphate radiation refrigeration pigment. The high-entropy rare earth phosphate radiation refrigeration pigment has high infrared emissivity in air, the emissivity reaches 0.90 or above within the wave band of 8-13 microns, the solar reflectivity reaches 0.93 or above within the wave band of 0.3-2.5 microns, and the high-entropy rare earth phosphate radiation refrigeration pigment has wide application prospects in the fields of building energy conservation, urban heat island effect reduction, photovoltaic power generation efficiency improvement and the like.

The invention provides a europium ion doped titanate compound as well as a preparation method and application thereof, and relates to the technical field of rare earth luminescent materials. The chemical formula of the titanate compound provided by the invention is K2Ti6O13: xEu < 3 + >, the titanate compound is in a monoclinic system. A proper amount of Eu < 3 + > ions are doped in K2Ti6O13, so that the prepared rare earth fluorescent powder has higher color rendering index and quantum yield, and the luminescent property of a white light LED can be greatly improved; as K2Ti6O13 has good electrochemical performance and relatively high conductivity, the rare earth fluorescent powder provided by the invention can also be used in the fields of illumination, display, photocatalysis and energy storage. And on the other hand, the preparation method provided by the invention is simple in process, mild in condition, convenient for large-scale production and wide in development and application space.

The invention provides a compound guanidine fluoroborate and a guanidine fluoroborate nonlinear optical crystal as well as a preparation method and application, the chemical formula of the compound is [C (NH2) 3] 3B3O3F6, the molecular weight is 370.66, a room temperature solution method is adopted, the molecular weight of the guanidine fluoroborate nonlinear optical crystal is 370.66, the crystal belongs to a monoclinic system, the space group is Pc, and the cell parameters are as follows: a = 8.5366 (10), b = 11.5066 (12), c = 9.2274 (9), alpha = 90 degrees, beta = 122.682 degrees and gamma = 90 degrees. And the unit cell volume is 762.883. And growing the crystal by adopting a room-temperature solution method or a hydrothermal method. The crystal has good chemical stability, and can be used as a short-wavelength nonlinear optical crystal in an all-solid-state laser.

The invention provides a compound cesium sodium fluoborate, a cesium sodium fluoborate nonlinear optical crystal and a preparation method and application thereof, the chemical formula of the compound is NaCs7 [B3O3F4 (OH)] 4 (H2O) 3, the molecular weight is 1701.16, and the compound is prepared by a room temperature solution method; the chemical formula of the crystal is NaCs7 [B3O3F4 (OH)] 4 (H2O) 3, the molecular weight is 1701.16, the crystal belongs to a monoclinic system, the space group is P21, the cell parameters are as follows: a is equal to 11.5864 (15), b is equal to 13.463 (2), c is equal to 12.5958 (19), alpha is equal to 90 degrees, beta is equal to 90 degrees, gamma is equal to 109.697 (5) degrees, the unit cell volume is 1849 (5) 3, the crystal is grown by adopting a room temperature solution method or a hydrothermal method, the chemical stability of the crystal is good, and the crystal can be used as a short-wavelength nonlinear optical crystal to be applied to an all-solid-state laser.

The invention discloses a polyacid-based metal viologen framework crystalline material as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalytic materials. The crystalline material is synthesized in one step through a hydrothermal method, the molecular formula is Cu2 (H2O) 2 (L) 2 [PW12O40] [OH]. 2H2O, the crystalline material belongs to a monoclinic system, the space group is P21, the cell parameters are alpha = 90 degrees, beta = 114.208 (2) degrees and gamma = 90 degrees, and the structure of the crystalline material is determined through X-ray diffraction. According to the material, accurate compounding of polyacid clusters and metal viologen on the molecular level is achieved, an effective electron transmission channel is constructed, separation of photon-generated carriers is remarkably promoted, and excellent photocatalytic activity is shown. At the ambient temperature, the crystalline material can be used as a catalyst to efficiently degrade dye pollutants (such as methylene blue and rhodamine B) in a water body, the degradation rate within 60 minutes exceeds 90%, and the crystalline material has good cycle stability and structural durability.

Provided are a potassium ion-selective electrode having higher stability and a method for manufacturing the same. The all-solid-state potassium ion selective electrode comprises a conductor; the embedded material is formed on the surface of the conductor; and a potassium ion sensing film covering the embedded material. The embedded material is a mixed material containing Prussian blue analogue particles and conductive material particles, the Prussian blue analogue particles are represented by a structural formula KxFe [Fe (CN) 6] y.nH2O, the Prussian blue analogue particles at least partially have a monoclinic crystal structure, x is a number greater than or equal to 1.5 and less than or equal to 2, y is a number greater than 0 and less than or equal to 1, and n is an integer greater than or equal to 1. N is a number greater than or equal to 0.

The invention relates to the technical field of semiconductor detectors, in particular to a gallium oxide mixed-phase thin film, an ultraviolet detector and a preparation method of the gallium oxide mixed-phase thin film. The gallium oxide mixed-phase thin film is doped with 5-15 at% of zinc, and the crystal phases comprise two crystal phases, namely beta-Ga2O3 of a monoclinic system and epsilon-Ga2O3 of a hexagonal system; the preparation method comprises the following steps: cleaning a substrate; the substrate tray is heated to 500 DEG C to 950 DEG C, and the internal pressure is kept at 1000 Pa to 2000 Pa; introducing high-purity nitrogen; a zinc organic source and a gallium organic source are introduced in an equal proportion every 5-30 min, and the condition is kept for 20-50 min after the final gas carrying capacity is achieved; slowly introducing high-purity oxygen until the flow rate of the oxygen reaches 500-1000sccm and is constant, and slowly growing zinc-doped Ga2O3; and growing for 80-150 minutes to obtain the gallium oxide mixed phase thin film. The invention has the advantages of high stability, good robustness and enhanced light response in the device.

The application provides an In-MOF crystal material and a preparation method and application thereof, and the molecular formula of the In-MOF crystal material is [In(phen)(BDC) 1.5 ]·H2O, wherein phen is 1,10-phenanthroline, and BDC is terephthalic acid ligand; the crystal belongs to a monoclinic crystal system P2 1 / n with a space group, and the cell parameters are alpha=90°, beta=97.774(2)°, gamma=90°, a=12.3359(3)Å, b=14.1993(4)Å, c=15.4995(4)Å, the cell volume is 2689.96(12)Å 3 , and Z=4. The application synthesizes an In-MOF crystal material by using a simple room temperature solvent evaporation method, and the In-MOF crystal material can be used as a catalyst for electrocatalytic carbon dioxide reduction, and realizes efficient carbon dioxide reduction to form formic acid.

The invention relates to a sulfur-antimony-lanthanum-barium compound, a sulfur-antimony-lanthanum-barium mid-far infrared birefringent optical crystal and a preparation method and application thereof, relates to a mid-far infrared birefringent crystal and a preparation method and application thereof, and aims to solve the problem of low birefringence of the existing mid-far infrared crystal, the sulfur-antimony-lanthanum-barium compound has the chemical formula of Ba2La2Sb4S10 (S2) and the molecular weight of 1424.22, is crystallized in a monoclinic system, and has the molecular weight of 294nm. The space group is P21 / c, and the cell parameters are as follows: a = 8.6373 (5), b = 14.7336 (9), c = 15.9161 (9), alpha = gamma = 90 degrees, and beta = 92.661 (2) degrees. Preparing a compound or a polycrystal material by using a high-temperature solution or a solid-phase method; a polycrystalline material is used for growing a single crystal, the birefringence of the single crystal is 0.53 at the position of 1064 nm, the single crystal has large birefringence within the range of 1-14 microns, and the single crystal is used in an optical isolator, a circulator, a beam shifter, an optical polarizer or an optical modulator.

This invention discloses a samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material, its preparation method, and its applications. The samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material belongs to the monoclinic crystal system, has a space group of Cm, and a chemical formula of Sm. 0.3 La 0.1 :Y 0.6 Ca4O(BO3)3 has a second harmonic response intensity of 0.89 × KDP, and exhibits transmittance exceeding 80% in the 500–1000 nm and 1600–2400 nm wavelength ranges. It also has a strong absorption peak in the 1000–1600 nm wavelength range. Therefore, the samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal can be considered as a nonlinear optical crystal material with broad application prospects in the field of optics.

The application discloses a three-dimensional ferroelectric material based on two-dimensional ice stacking and preparation and application thereof, and belongs to the technical field of ferroelectric materials and multifunctional devices. The material is a three-dimensional periodic crystal structure of monoclinic P21 space group, water molecules in the material form a completely saturated network through hydrogen bonds, and there is no suspended hydrogen; interlayers are coupled through van der Waals force to form a multi-level cooperative ferroelectric sequence of "in-plane hydrogen bond ferroelectric + interlayer van der Waals ferroelectric". The material has the characteristics of a wide-bandgap semiconductor (band gap 5-6 eV), extreme anisotropic mechanical properties (Z-axis Young's modulus 48.6 GPa, Eyx=0.973), moderate bulk modulus (12.23 GPa), good acoustic performance (sound velocity 2638 m / s) and extremely high pressure stability (0-3000 GPa structure is complete, 1190 GPa metalization transition). The material can be widely applied in the fields of X-ray optical devices, ferroelectric memories, deep ultraviolet photoelectric detectors, extreme high-pressure sensors, directional stress sensors, mechanical logic devices, surface acoustic wave filters, multifunctional integrated microsystems and multi-parameter composite sensing networks, and opens up a new direction for pure water-based functional materials.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to lithium carboxylate as well as a preparation method and application thereof. The carboxylic acid lithium salt provided by the invention has a monoclinic system structure, and the space group is P21 / c; the purity of the lithium carboxylate is greater than or equal to 99.7%. The carboxylic acid lithium salt has a complete crystal structure, relatively high purity and low lithium removal potential, and no residue is generated when the carboxylic acid lithium salt is used as the positive electrode lithium supplement agent. The lithium carboxylate provided by the invention has high purity, crystal integrity and excellent electrochemical performance, and reaches the standard of a power battery additive; the positive electrode material prepared by using the carboxylic acid lithium salt provided by the invention as a positive electrode lithium supplement agent has excellent physical and chemical properties and environmental friendliness, irreversible decarboxylation lithium release can be realized through a Kolbe electrolytic reaction, and active lithium loss in the first cycle is effectively compensated; and when applied to the lithium ion battery, the lithium ion battery has relatively low decomposition working voltage and stability.

The application belongs to the field of catalyst and its preparation technology, and particularly relates to a three-dimensional network structure barium complex catalyst and a preparation method and application thereof.The three-dimensional network structure barium complex catalyst is a monoclinic crystal.The preparation method of the three-dimensional network structure barium complex catalyst comprises the following steps: mixing 3-(3-carboxyphenyl)-isonicotinic acid, a barium source and an alkali auxiliary agent in a solvent, heating and reacting, filtering, and standing the filtrate to obtain the three-dimensional network structure barium complex catalyst.The preparation method of the three-dimensional network structure barium complex catalyst has the characteristics of low cost, low toxicity, high selectivity, good stability and green environmental protection when the prepared catalyst with a crystal structure is applied to the preparation of N-(1-phenyl-3-phenylprop-2-yn-1-yl)piperidine.

The present invention relates to a rubidium fluoro-scandium borate compound, a rubidium fluoro-scandium borate nonlinear optical crystal, and a preparation method and application thereof. The rubidium fluoro-scandium borate compound has a chemical formula Rb2ScB3O6F2, does not contain a symmetry center and has a molecular weight of 382.33 g / mol. The rubidium fluoro-scandium borate nonlinear optical crystal belongs to the monoclinic crystal system, and belongs to the non-centrosymmetric space group P21, and the unit cell parameters are: a=4.0372(10) Å, b=11.800(3) Å, c=8.823(2) Å, α=γ=90°, β=98.327(11)°, Z=2. The present invention adopts a high-temperature vacuum packaging method or a solid-state synthesis method to prepare rubidium fluoro-scandium borate compounds. The present invention adopts a fluxing agent method to prepare a rubidium fluoro-scandium borate nonlinear optical crystal, which have the advantages of short absorption cutoff edge, large nonlinear optical effect, good thermal stability, and stable physical and chemical properties. The rubidium fluoro-scandium borate nonlinear optical crystal of the present invention can be used to fabricate nonlinear optical devices, which have important applications in fields such as optics, military, laser lithography, and communication, etc.

The invention discloses a cocrystal formed by gliclazide and 2-methylimidazole and a preparation method thereof, and relates to the fields of medicine and crystal technology. The gliclazide-2-methylimidazole cocrystal has the following unit cell parameters: the crystal system category is monoclinic system; the space group is P21, the unit cell length b=21.6819(9), c=13.4019(6); the unit cell angle (°) α=90, β=104.325(4), γ=90, etc. The gliclazide-2-methylimidazole cocrystal can be obtained by a solvent volatilization method and a grinding method. The gliclazide-2-methylimidazole cocrystal of the invention is a new crystal form different from gliclazide and 2-methylimidazole, has better water solubility and alcohol solubility than gliclazide, and has greatly improved thermal stability and light stability, thereby expanding the application prospect of gliclazide.

This invention provides a method for preparing rice-grain-shaped TiO2-B with adjustable aspect ratio, belonging to the technical field of anode materials for alkali metal ion batteries. The TiO2-B belongs to the monoclinic crystal system, space group C2 / m. The TiO2-B particles are ellipsoidal, with the c-axis as the major axis (7-13 nm) and the ab-axis as the minor axis. Its aspect ratio can be controlled within the range of 1.76-3.51, achieving a purity greater than 98%. The raw materials are inexpensive and reusable. The preparation method provided by this invention is simple, yields a highly controllable product with a large specific surface area, high purity, and good electrochemical performance.

The invention belongs to the field of luminescent materials, and particularly relates to a fluorinated zero-dimensional antimony-based perovskite photoelectric material and a preparation method and application thereof. The fluorinated zero-dimensional antimony-based perovskite photoelectric material is a single crystal, the fluorinated 0D antimony-based perovskite photoelectric material is (CTPP) 2SbFCl4 or (CTPP) 2SbFBr4, and the (CTPP) 2SbFCl4 and the (CTPP) 2SbFBr4 are in a P21 / c space group and belong to a monoclinic system. The fluorinated zero-dimensional antimony-based perovskite photoelectric material prepared by the invention has good crystallinity and luminescence property, and also has good thermal and wet stability.

A particulate crystalline nanocomposite including: a monoclinic bismuth oxide (Bi2O3) crystalline phase; a calcium silicate (CaSiO3) crystalline phase; and, a graphitic carbon nitride (g-C3N4) crystalline phase, wherein at least a fraction of the g-C3N4 is in the form of mesoporous nanosheets.

The invention relates to a sulfur-gallium-silver-sodium compound and a sulfur-gallium-silver-sodium infrared nonlinear optical crystal as well as a preparation method and application thereof, the molecular formula of the compound is NaAg3Ga8S14, the molecular weight is 1353.20 g / mol, the compound has an asymmetric center and is crystallized in a Cm space group of a monoclinic system, and the cell parameters are as follows: a is equal to 12.2616 (8), b is equal to 11.0956 (7), c is equal to 9.2131 (6), beta is equal to 114.981 (2) degrees, Z is equal to 2, and the volume is 1136.18 (13) 3. The crystal is prepared by a high-temperature melt method, a chemical vapor transport method or a Bridgman-Stockbarger method. The crystal has the advantages of being high in laser damage resistance, moderate in nonlinear optical effect, wide in light-transmitting wave band, large in hardness, good in mechanical performance, not prone to fragmentation and deliquescence, easy to process and store and the like, and can be used for manufacturing infrared nonlinear optical devices.

This invention discloses an antimony-doped wide-bandgap zirconium chloride powder-emitting crystal material, its preparation method, and its application. The chemical formula of the powder-emitting crystal material is (C9H). 15 N3)2ZrCl8:Sb 3+ It belongs to the monoclinic crystal system, with space group P21 / c; in the described photoluminescent crystal material, each zirconium atom is coordinated with 8 chlorine atoms to form [ZrCl8]. 4‑ Polyhedral structure, organic cation (C9H) 15 N3) + It is linked to inorganic anions via C–N–H···Cl bonds, forming discrete [ZrCl8]. 4‑ The octahedral structure is replaced by organic cations (C9H). 15 N3) + Complete isolation is achieved, forming a zero-dimensional ionic crystal structure. This invention overcomes the problems of single luminescent center, limited emission wavelength, and insufficient luminescence intensity in undoped zirconium-based chlorides by introducing antimony. Antimony, as an effective luminescent center, can promote the radiative recombination process and achieve high-brightness broadband emission.

The present invention discloses the preparation and application of a cheap metal-organic fluorescent material for high-power LED lighting. The chemical formula of the complex is: [Cu₄I₄(bbimb)₂]ₙ, where the ligand bbimb is 1,2-bis((1H-benzoimidazol-1-yl)methyl)benzene, and its chemical formula is: C₂₂H₁₈N₄; the complex crystal belongs to the monoclinic system, the space group of the complex is P21 / c, and the crystal parameters of the complex are a = 11.3850(3) Å, b = 16.1962(3) Å, c = 26.8795(6) Å, α = 90°, β = 98.879(2)°, γ = 90°, Z = 4, V = 4897.02(19) ų. The present invention also provides a preparation method of the complex, which is simple, has good stability and high yield. The obtained complex shows orange fluorescence emission under the irradiation of a 365 nm ultraviolet lamp. And a large temperature range of zero thermal quenching occurs in the temperature range from 80 K to 500 K, and its fluorescence intensity hardly quenches with the increase of temperature, having broad application prospects in the field of ZTQ materials. Moreover, the optical properties of the LED assembled with the complex as the material are studied, and the LED shows good white light emission performance under high-throughput current.

The invention discloses a tantalum phosphate nonlinear optical crystal as well as a preparation method and application thereof. The chemical formula of the nonlinear optical crystal is Na11Ta8P7O43, the nonlinear optical crystal belongs to a monoclinic system, the space group is Cc, the nonlinear optical crystal is of a non-centrosymmetric structure, and the cell parameters are respectively # imgabs0 # beta = 92.304 (2) degrees and Z = 4. The tantalum phosphate nonlinear optical crystal belongs to a monoclinic system, the space group is Cc, and the tantalum phosphate nonlinear optical crystal has a good nonlinear optical effect, a short cut-off edge and a high indirect band gap.

The invention discloses an energetic material, a preparation method thereof and application of the energetic material as an initiating explosive, an explosive and a pyrotechnic compound. The chemical formula of the energetic material is MC10H18B2N6; wherein M is selected from at least one of Mn, Fe, Co, Ni, Cu, Zn and Cd; the crystal structure of the energetic material belongs to a monoclinic system, and the space group is P21 / n. The obtained energetic material has excellent stability and safety, and is green and environment-friendly. Through experimental determination, the thermal stability is greater than or equal to 120 DEG C, the impact sensitivity is greater than or equal to 40J, and the friction sensitivity is greater than or equal to 240N. Compared with an existing commercial propellant (unsymmetrical dimethylhydrazine), the ignition delay time of the energetic material is equivalent, the defects that fuel and an oxidizing agent are seriously mixed and the combustion efficiency is low are overcome, and the energetic material has important commercial application value in the field of green high-performance energetic materials.

The present invention provides a compound guanidine fluoborate and a guanidine fluoborate nonlinear optical crystal and a preparation method and use thereof. The chemical formula of the compound is [C(NH2)3]3B3O3F6, and the molecular weight is 370.66. The guanidine fluoborate nonlinear optical crystal is prepared by a room temperature solution method, and the molecular weight is 370.66. The crystal belongs to the monoclinic system and the space group is P c, the unit cell parameters are a=8.5366(10), b=11.5066(12), c=9.2274(9), α=90°, β=122.682°, γ=90°, and the unit cell volume is 762.88Å 3 The crystal is grown using a room temperature solution method or a hydrothermal method. The crystal has good chemical stability and can be used as a short-wavelength nonlinear optical crystal in all-solid-state lasers.

This invention discloses a nicotinamide-salicylic acid cocrystal, its preparation method, and its uses, relating to the field of cocrystal technology. The nicotinamide-salicylic acid cocrystal comprises nicotinamide and salicylic acid molecules, and the molecular formula of the nicotinamide-salicylic acid is C0. 13 H 12 N2O4, wherein the molar ratio of nicotinamide to salicylic acid is 1:1; the eutectic is monoclinic, space group P21 / n, with cell parameters a=11.080(2)Å, b=5.0000(10)Å, c=22.820(5)Å, α=90°, β=97.60(3)°, γ=90°, V=1253.1(4)Å. 3 The differential scanning calorimetry (DSC) spectrum of the eutectic showed a characteristic endothermic peak around 142.4 ± 2 °C. This invention addresses the problems of poor stability of nicotinamide, low solubility of salicylic acid, and strong irritation in existing technologies by optimizing intermolecular interactions to form a specific crystal form, thus providing a novel raw material with superior performance for the cosmetics industry. This is achieved through the preparation of a structurally stable, simple, and chemically superior nicotinamide-salicylic acid eutectic with excellent physicochemical properties.