47 results about "Persistent luminescence" patented technology

The present disclosure teaches an article of manufacture using an industrial (or commercial) manufacturing process. The article of manufacture comprises an infrared (IR) luminescent material that emits in the IR wavelength range (e.g., from approximately seven-hundred nanometers (˜700 nm) to approximately one millimeter (˜1 mm)) after being excited by incident wavelengths of between ˜100 nm and ˜750 nm (or visible light). In other words, once the material has been exposed to visible light, the material will continue to emit in the IR wavelength range for a period of time, even when the material is no longer exposed to the visible light.

The invention belongs to the technical field of 3D printing and flexible high-hydrophobicity self-luminous life jackets, and particularly relates to a flexible high-hydrophobicity self-luminous life jacket and a preparation method thereof. A self-luminous waterborne polyurethane emulsion of a hydrophobic modified energy-storage long-afterglow luminescent material is synthesized, the prepared self-luminous waterborne polyurethane emulsion is used for coating and post-processing a thermoplastic polyurethane elastomer (TPU) flexible life jacket part formed by SLS, and a luminous coating permeates into micro-gaps in the surface of the TPU part and is attached to the surface. And a firmly attached self-luminous coating is formed after curing, so that the hydrophobic property of the TPU life jacket product is obviously improved, and the self-luminous function in a dim and dark environment is also realized. The problems that a traditional fluorescent material is low in luminous intensity, incapable of continuously emitting light, poor in water resistance and the like are solved, and excellent high-hydrophobicity self-luminous performance is obtained on the premise that the original SLS forming process characteristics of the TPU life jacket are not changed and the mechanical property of the TPU life jacket is reserved.

A long-persistent luminescence emitter containing a polymer that contains, relative to the total molar amount of an electron donor structural unit and an electron acceptor structural unit therein, 70 mol % or more of an electron donor structural unit and less than 30 mol % of an electron acceptor structural unit, or containing a polymer that contains, relative to the total molar amount of an electron donor structural unit and an electron acceptor structural unit therein. 70 mol % or more of an electron acceptor structural unit and less than 30 mol % of an electron donor structural unit. The emission decay after stopping light irradiation to the emitter is power law decay.

The invention discloses a Tb < 3 + > activated niobate green stress luminescent material, and relates to the technical field of luminescent materials. The expression general formula of the mechanical luminescent material is (Ca2-xSrx) Nb2O7: yTb, x is greater than or equal to 0 and less than or equal to 1, and y is greater than 0 and less than or equal to 0.09; a high-temperature solid-phase method is adopted, and the preparation process comprises the following steps: 1) burdening; 2) grinding and drying; 3) sintering; and 4) grinding. The stress luminescent material provided by the invention has unique green stress luminescence after being radiated at 254 nm for 3 minutes, the spectral range of niobate stress luminescence is successfully expanded to a green area, the key problem that the existing niobate stress luminescent material has single luminescence color is solved, and the application potential of the material is remarkably improved; and the material shows excellent continuous luminescence performance, can continuously emit light for more than 5 minutes after an excitation light source is turned off, and has very wide application value in the fields of visual stress sensing, anti-counterfeiting encryption and the like.

The invention relates to the technical field of biosensing, and discloses a pH / viscosity double-lock activated afterglow luminescent small molecule probe as well as a preparation method and application thereof. The structural formula of the afterglow luminescent small-molecule probe is shown in the specification. A rhodamine light-emitting unit and an afterglow light-emitting matrix unit SO are covalently connected through a chemical bond. The luminescent mechanism is as follows: under illumination, molecules generate singlet oxygen to oxidize and activate adjacent SO units, so that active oxygen mediated afterglow luminescence is generated. The afterglow luminescent small-molecule probe has a double-lock activation characteristic, that is, a strong afterglow signal can be generated only when a subacid environment and a high-viscosity condition are met at the same time. And the signal is weak under a single condition or a normal physiological environment. The probe provided by the invention has excellent environmental specificity and high signal-to-noise ratio imaging capability, and provides a powerful tool for realizing accurate imaging in a complex biological system.

The invention relates to the field of noctilucent stones, and discloses a noctilucent stone preparation method which comprises the following steps: S1, weighing and mixing raw materials, namely weighing the raw materials in parts by weight, pouring the raw materials into stirring equipment, adding water, and sufficiently and uniformly stirring to form a mixture; s2, mold forming: pouring the mixture into a mold; s3, curing: curing the mold in a suitable environment to form a noctilucent stone blank; s4, demolding, and taking out the primarily formed noctilucent stone; and S5, grinding and polishing are conducted, specifically, machine grinding and polishing treatment is conducted on the noctilucent stone obtained after demolding. The noctilucent stone is added into the aggregate, so that the noctilucent stone pier can absorb light energy and automatically emit light without an external power supply, the continuous light emitting effect in the dark is achieved, energy conservation and environmental protection are achieved, the warning, guiding or decorating functions can be provided at night through the light emitting characteristic, and the safety and visual recognition degree of scenes such as road isolation and landscape marks are remarkably improved.

The invention discloses a tumor targeted nano photodynamic therapy system and a preparation method thereof. The preparation method comprises the following steps: preparing porous NaYF4: Er-coated NaGdF4 persistent luminescent nanoparticles; the preparation method comprises the following steps: preparing ES-PEG-p (API-PPA)-Ce6; eS-PEG-p (API-PPA)-Ce6 and a hydrophilic drug are mixed, NaYF4: Er-coated NaGdF4 is dropped, encapsulation of PLNPs and formation of micelles are induced, polyether F-127 is added, the pH value is adjusted to be neutral, and the tumor targeting nanometer photodynamic therapy system is prepared. The tumor targeting nanometer photodynamic therapy system has reversible'on-off 'afterglow characteristics, combines accurate surgical navigation with enhanced ROS generation, can be used in combination with PDT, is used for targeted therapy of deep tumors such as pancreatic cancer, and has high clinical application value.

An optical material comprising a fluoride with a formula MF 2, wherein M is selected from the group of Ca, Sr, Ba, doped with rare earth ions, showing a persistent luminescence after stimulation with a femtosecond source.

The invention discloses a preparation method and application of an all-weather photocatalyst. The all-weather photocatalyst is a covalent heterojunction composite photocatalytic material prepared by vertically growing ZnIn2S4 on the surface of Sr2MgSi2O7: Eu < 2 + >, Dy < 3 + >. The mass ratio of the ZnIn2S4 to the Sr2MgSi2O7 to the Eu < 2 + > to the Dy < 3 + > is (0.5-1): 1. The long-afterglow luminescent material (Sr2MgSi2O7: Eu < 2 + >, Dy < 3 + >) is prepared by adopting a recrystallization melting method, and compared with a traditional melting calcination method and a sol-gel method, the long-afterglow luminescent material has the advantages of good afterglow performance, low calcination temperature and short preparation time; through an interface covalent bond connection strategy, ZnIn2S4, Sr2MgSi2O7: Eu < 2 + > and Dy < 3 + > construct a compact heterojunction composite system, the structure stability is good, spatial separation of photon-generated carriers is promoted, the problem of photocatalytic all-weather degradation of organic pollutants is solved by utilizing the continuous luminescence characteristic of a long-afterglow material and the catalytic activity continuously maintained under a dark condition, and the material has good application prospects. The photocatalyst prepared by the invention also has the beneficial effect of resisting escherichia coli.

The invention provides an outdoor grating anti-interference system, which comprises at least one path of infrared emission device used for emitting an infrared coding optical signal representing the unique identity of the infrared emission device; the infrared coding light signal is a pulse sequence emitted in an instantaneous high driving current state within the single maximum continuous light emitting duration, the pulse sequence is composed of a plurality of discrete light emitting pulses with the same width, and the sum of the widths of the light emitting pulses is equal to the single maximum continuous light emitting duration; the at least two paths of infrared receiving devices are used for receiving the infrared coding optical signals from the same infrared transmitting device at the same time; the coding processing unit is connected with the infrared receiving devices and is used for decoding the infrared coding optical signals received by each path of infrared receiving devices; only when all infrared receiving devices corresponding to the same light path cannot correctly decode the identity label from the infrared coding light signal of the light path, it is judged that the light path is shielded. The shielding misjudgment can be reduced, and the anti-interference capability of the outdoor grating is improved.

The invention discloses application of a manganese-doped zinc germanate nanorod fluorescent probe in hypochlorous acid and sodium hypochlorite interference resistance in blood analysis, relates to the technical field of germanium-containing luminescent materials, and aims to solve the problem that hypochlorous acid and sodium hypochlorite can interfere blood detection. After the photobleached manganese-doped zinc germanate nanorod fluorescent probe disclosed by the invention is in contact with a sample containing hemoglobin, hypochlorous acid or sodium hypochlorite, fluorescence and continuous luminescence properties are recovered; the attenuation rate after the hypochlorous acid or sodium hypochlorite induced fluorescence and continuous luminescence are recovered is greater than the attenuation rate after the hemoglobin induced fluorescence and continuous luminescence are recovered; according to the method, residual bloodstains which are cleaned by hypochlorous acid or sodium hypochlorite and cannot be seen by naked eyes in the sun can be identified and detected by utilizing the characteristic that the fluorescence decay rate after the reaction fluorescence of photobleached ZGO: Mn NRs and hypochlorous acid or sodium hypochlorite is recovered is greater than the fluorescence decay rate after the fluorescence induced by hemoglobin is recovered.

The invention provides a 1, 2-dioxetane derivative as well as a preparation method and application thereof, and belongs to the technical field of chemiluminescent substrates. The 1, 2-dioxetane derivative provided by the invention has high luminous efficiency and good stability. The result of the embodiment shows that the time required by the 1, 2-dioxetane derivative provided by the invention to reach the maximum luminescence peak value at 25 DEG C is only 5-30 minutes, and the continuous luminescence time can reach 70 minutes.

The present invention discloses a class of full-spectrum multicolor long afterglow fluorescent materials at 77K and a preparation method thereof, belonging to the technical field of rare earth luminescent materials. The multicolor low-temperature long afterglow material of the present invention uses a double perovskite material doped with rare earth ions as a fluorescence emitter, and its chemical formula is Cs2NaLuCl6:5%Ln 3+ , where Ln is one or a combination of more of Er, Tm, Tb, Dy, Sm, Pr, Nd. The phosphor of the present invention has good chemical stability and excellent luminescence performance, and has a persistent luminescence lasting up to 2 hours at the liquid nitrogen temperature of 77 K. By simply changing the luminescence center, long afterglow luminescence of various colors such as red, green, and blue can be achieved at 77 K.

The invention provides an organic long-afterglow luminescent material capable of enhancing luminescence and a preparation method and application thereof, and belongs to the technical field of organic photoelectric materials, and the organic long-afterglow luminescent material comprises a donor material based on a carbazole derivative and an acceptor material based on a phenanthrene derivative, the donor material based on the carbazole derivative is PVK, TCP, mCP-CN, 26DCzPPy, SBF-Cz, SP-Cz and the like. According to the invention, a bi-component form constructed by a donor material based on a carbazole derivative and an acceptor material based on a phenanthrene derivative is adopted, stable long-life luminescence in an air atmosphere is realized by utilizing intermolecular charge transfer between the bi-components, luminescence with two properties of TADF and long life is realized, and after irradiation of a 365nm ultraviolet fluorescent lamp is turned off, the luminescence effect is good. The material can continuously emit light for more than several seconds, has excellent fluorescence quantum yield and attenuation life, and can be used for anti-counterfeiting and information encryption.

The invention relates to a light storage plant light supplement lamp based on long afterglow fluorescent powder and a preparation method of the light storage plant light supplement lamp, and belongs to the technical field of agricultural lighting. According to the light supplementing lamp, long-afterglow fluorescent powder is adopted as a core material, the surface of an LED chip is coated with the long-afterglow fluorescent powder, the three-channel spectrum adjusting technology is combined, and customized spectrum support is provided for plants by adjusting the intensity proportion of blue light (450 nm), red light (660 nm) and near-infrared light (730 nm). The long-afterglow fluorescent powder is composed of a rare earth activator (such as Cr < 3 + >, Mn < 4 + > and Eu < 3 + >) and a perovskite or garnet matrix, and can continuously emit light for more than 8 hours after power failure, so that the illumination requirement of plants at night is met, and the energy consumption is remarkably reduced. The light supplementing lamp adopts efficient heat dissipation design, the service life of the lamp is prolonged, and the maintenance cost is reduced. The device is especially suitable for scenes of plant factories, greenhouse planting, vertical agriculture and the like, and has the advantages of energy conservation, spectrum adjustability, low heating and long service life.

An aircraft includes fuselage walls, a passenger cabin between the fuselage walls, rows of seating arranged with an aisle through the rows, an emergency exit in the fuselage walls, an access path between the rows of seating to the emergency exit from the aisle, and a marker forming tracks on a floor of the aisle and access path, to direct passengers to the emergency exit. The marker includes a photoluminescent material exhibiting persistent luminescence and comprising a pigment that emits blue visible light in response to excitation by light of wavelength between 250-500 nm. The photoluminescent material has an emission spectrum providing light which appears blue to a viewer, with a maximum peak intensity between 400-510 nm. The marker includes a cover over a top surface of the photoluminescent material that partially blocks light of some UV range wavelengths whilst being transparent to other wavelengths in the UV range.

The invention relates to the technical field of sports goods, and particularly discloses a high-brightness day and night double-effect fluorescent badminton string and a preparation method thereof. The badminton string adopts a three-layer composite structure of a core wire layer, a composite fluorescent functional layer and a high-light-transmittance protective wear-resistant layer, and the core wire layer is formed by twisting polyester fibers or ultra-high molecular weight polyethylene fibers and provides basic mechanical support; the composite fluorescent functional layer adopts a daytime fluorescent pigment-long-acting light-storing fluorescent powder compound system, and is matched with nano reflective beads to enhance the light reflection efficiency, the composite fluorescent functional layer continuously emits light for more than or equal to 12 hours in a dark environment after being irradiated by a light source for 10-20 minutes, and the visible distance under natural light in daytime is more than or equal to 8 meters; the high-light-transmittance protective wear-resistant layer is made of modified polyamide resin with the light transmittance larger than or equal to 85%, and the tensile strength of spherical lines is larger than or equal to 30 MPa while the light emitting effect is guaranteed. The technical defects that an existing fluorescent badminton string is insufficient in luminous intensity at night and poor in visual effect in the daytime are overcome, and the day and night use requirements can be met without additional power supply equipment.

The invention relates to escape route markings (1), especially for public transport vehicles, such as commercial aircraft. The escape route marking (1) comprises a lighting element (3) which luminesces in the dark and whose emitted light exits at an outer face (2) of the escape route marking (1), wherein the lighting element (3) comprises a granular material immobilized by a carrier material (20) and composed of at least translucent particles (10), wherein the average size of the granular-material particles (10) is greater at least by a factor of 10 than the average grain size of the sustained-luminescence pigments (11) contained therein.

The utility model relates to a blind road brick with long afterglow luminescence performance, and belongs to the technical field of floor tiles. The blind road brick comprises a blind road brick body, a blind road brick protrusion is arranged on the upper surface of the blind road brick body, a coating groove is formed in the blind road brick protrusion, a long afterglow coating layer is arranged in the coating groove, and an inserting block is arranged on the side face of the blind road brick body. The side face, opposite to the inserting block, of the blind road brick body is provided with a groove matched with the inserting block. According to the blind road brick, the coating grooves are formed in the bulges of the blind road brick, and the long-afterglow coating layers are arranged in the coating grooves, so that the blind road brick can continuously emit light at night after light energy is stored in the daytime, the night identification degree can be improved, the blind road brick can be displayed as a blind road, and the effect of warning that the blind road brick does not occupy the blind road is achieved. The safety guarantee can be enhanced for pedestrians with visual impairment when going out at night, and the decorative effect can be achieved.

The application provides a preparation method of a phosphorescent biosensor for specifically detecting messenger RNA. In the application, a phosphorescent biosensor is constructed by using phosphorescence resonance energy transfer (PRET) between polydopamine (PDA) and persistent luminescence nanoparticles (PL). The biosensor comprises a PDA particle carrier and three nucleic acid chains, one of which is a hairpin chain (H) that is complementary to target TK1 mRNA, one is a DNA chain (PL-DNA) that is combined with the persistent luminescence nanoparticles through an amide bond, and the other is a substrate chain (S-15A) that is complementary to the PL-DNA. In the absence of the target, the phosphorescence of the PL is absorbed by the PDA, resulting in a weak signal; after the target is added, the target opens the H, and the exposed flexible end displaces the PL-DNA from the S-15A, so that the PL is away from the PDA, the PRET is closed, the phosphorescence signal is restored, and the phosphorescence signal is enhanced with the increase of the concentration of the target, and the linear relationship is 0-200 nM. The detection limit of the application is 1.74 nM.

The utility model discloses luminescent glass, and relates to the field of glass pieces. The luminescent glass comprises a luminescent glass set and supporting pieces arranged on the two sides of the luminescent glass set, the luminescent glass set comprises a wear-resistant glass plate, a high-transmittance tempered glass plate and a fluorescent agent, the wear-resistant glass plate is arranged between the two supporting pieces, the high-transmittance tempered glass plate is arranged below the wear-resistant glass plate, and the fluorescent agent is arranged in the high-transmittance tempered glass plate. The tempered glass is arranged below the high-transmittance tempered glass plate, and a lamp holder is arranged in the supporting piece. According to the luminescent glass, when the luminescent glass is treaded, the pressure sensor receives pressure, at the moment, the lamp cap is started, light rays are emitted into the glass group, high-brightness light emitting during treading is achieved, meanwhile, the fluorescent agent absorbs light energy in the process, when the pressure on the luminescent glass group disappears, the lamp cap extinguishes light, and the fluorescent agent continuously emits light within a period of time by absorbing the light energy; therefore, the combined long-time light emission of the light effect is realized at lower cost.

The invention discloses an organic long-lasting luminescent material with a narrow-band emission characteristic and application thereof, and belongs to the field of organic long-lasting luminescent materials. The donor comprises one or more of the following materials; the receptor includes:.

The invention relates to a long-afterglow / carbon dot composite nanomaterial with the service life of a near-infrared second zone enhanced, a preparation method and application, the composite nanomaterial is formed by combining a long-afterglow nanomaterial and carbon quantum dots CDs through covalent bonds, the preparation method comprises the steps that the long-afterglow nanomaterial PLNPs is subjected to surface functionalization, and the long-afterglow / carbon dot composite nanomaterial with the service life of the near-infrared second zone enhanced is obtained. Energy level matching of the PLNPs and the CDs is achieved, and therefore energy transfer between the two materials is enhanced. Under the irradiation of 254nm light, the CDs can emit strong green light, energy is transferred to the PLNPs through the CDs, so that the light emission of the PLNPs in a near-infrared second region is enhanced, and after an excitation light source is turned off, the composite nano material continuously emits light in the near-infrared second region through energy transfer, so that the light emission of the PLNPs in the near-infrared second region is enhanced. A new application and future application expansion are provided for near-infrared two-region biological imaging without in-situ excitation.

The application relates to a preparation method and application of a metal-organic framework (MOFs) material with photochromic and long persistent luminescence (LPL) characteristics. Specifically, X-MOFs (X=Cl, Br) are prepared by high-temperature self-assembly of ligand 1,1'- (6-hydroxy-1,3,5-triazine-2,4-diyl) bis (pyridine-4 (1H)-ketone) and CdCl2.2.5H2O and CdBr2. Research finds that, under the continuous irradiation of ultraviolet light, the X-MOFs realize photochromic behavior from yellow to gray. In addition, after the removal of different excitation light sources, the X-MOFs exhibit multicolor LPL which is dependent on excitation, temperature and time evolution. The X-MOFs material synthesized by the application provides potential application value in the fields of data encryption and anti-fake patterns.

The utility model discloses a power supply device and electronic equipment, and relates to the technical field of circuits, the power supply device comprises a light emitting circuit and a control circuit connected with the light emitting circuit, and the light emitting circuit comprises a photoreceptor and a light emitting module; the photoreceptor is arranged in a sensing range corresponding to the light-emitting module; and the photoreceptor is connected with the control circuit. Compared with the prior art, the control circuit can obtain the light-emitting condition of the light-emitting module in real time through the photoreceptor, the control circuit can accurately judge whether the light-emitting module has the abnormal light-emitting condition or not according to the light-emitting condition, that is, the light-emitting module still emits light continuously under the condition that the control circuit controls the power supply device not to provide electric energy; furthermore, the control circuit can judge that the internal relay is adhered, so that the light-emitting module still continuously emits light under the condition that the power supply device does not provide electric energy, the control circuit can accurately judge whether the internal relay is adhered or not, and the judgment complexity and cost are low.

The invention discloses a silicon nanodot, a high-performance super-long continuous light-emitting silicon nanodot composite material, a preparation method of the composite material and an application of the composite material in information encryption, and develops an economical, simple, convenient and innovative strategy, the silicon nanodot is integrated into a composite matrix, and the composite material is prepared. And the high photoluminescence quantum yield of the SiNDs is effectively combined with the stability of a substrate to triplet excitons. The phosphorescence quantum yield (PhQY) of the obtained material is up to 81.04%, the afterglow life is as long as 3.44 seconds, meanwhile, macroscopic cyan emission is accompanied, the duration time is up to 52 seconds, and the material is one of reported long-afterglow luminescent systems with the best performance. The high-performance multicolor long afterglow material is obtained with lower manufacturing cost and a simpler technological process, the problems that an existing afterglow material is low in phosphorescence quantum yield, single in function, potential in pollution and the like are effectively solved, and a new solution is provided for the field of information encryption and the like.

Preparation method and application of a core-shell structured PLNPs@COFs composite photocatalytic material, which specifically discloses a core-shell structured PLNPs@COFs composite photocatalytic material. Among them, the core is persistent luminescence nanoparticles (PLNPs), and the shell is a covalent organic framework material (COFs), with the chemical formula (x)Zn2GeO4:Mn,Li@(y)TaPa-1-COF (1≤x≤6, 1≤y≤6). This composite material is prepared by a solvothermal method. First, separate PLNPs are synthesized. After surface modification and aldehyde group formation of the PLNPs, they are mixed evenly with the precursor of COFs, and a core-shell structured PLNPs@COFs composite material is formed by in-situ growth through a solvothermal reaction. The composite photocatalytic material prepared by the present invention has good adsorption and redox capabilities, exhibits good performance in photocatalytic degradation of pollutants, and has good application prospects in the fields of environment and energy.

The utility model discloses a solar self-luminous spike which comprises a base, the base comprises a rectangular pyramid platform on the upper portion and a stand column on the lower portion, a first cavity is formed in the center of the upper surface of the rectangular pyramid platform, a second cavity is formed in the stand column, and the first cavity is communicated with the second cavity; a storage battery is placed in the second cavity, and a control circuit board, a photovoltaic cell panel, a light-transmitting and light-emitting module, a dodging sheet and a semitransparent glue injection layer containing a fluorescent light-emitting material are sequentially placed in the first cavity from bottom to top; the storage battery, the photovoltaic cell panel and the light-transmitting light-emitting module are all electrically connected with the control circuit board. The self-luminous spike with solar energy can realize the continuous luminescence of the spike, reduce the stroboscopic frequency and reduce the energy consumption.

A class of metal halide-based metal-organic frameworks (MOFs) materials with multicolor tunable long-lasting emission and white light properties were synthesized by self-assembly of 15-crown ether-5 (CE) ligands and metal halide salts (CdX2), resulting in three complexes (15-5-CdCl2, 15-5-CdBr2, and 15-5-CdI2). In the solid state, the complexes (15-5-CdCl2, 15-5-CdBr2, and 15-5-CdI2) all exhibited near-standard white light emission under 340 nm ultraviolet radiation at room temperature, with CIE coordinates of (0.28, 0.32), (0.31, 0.39), and (0.30, 0.34), respectively. Simultaneously, they exhibit excitation-dependent room-temperature phosphorescence (RTP) ranging from blue / cyan to green / yellow, with 15-5-CdCl2 and 15-5-CdBr2 exhibiting multicolor tunable and visible light luminescence (LPL) with time-resolved luminescence lifetimes as high as 1-2 seconds. Single-crystal X-ray diffraction analysis and theoretical calculations indicate that the bright LPL of 15-5-CdCl2 and 15-5-CdBr2 originates from the aggregation state induced by the 15-crown ether-5 ligand and halogen bonds. The LPL obtained in this way can be widely used in lighting and display devices, optical recording devices, biological imaging, security systems, and other fields.

The present invention relates to a ceramic or glass-ceramic material corresponding to one of the following formulas: [(Sr1-a1-b1 Xa1X'b1)1-e REe]12+c [(Al1-dYd)1-fMf]20+2c[(Si1-gZg)1-hMh]12-2cO66 formula (I) [(Sr12-a2-b2 Xa2X'b2)1-e REe][(Al1-dYd)1-fMf]20[(Si1-gZg)1-hMh]12O66 formula (II) in which: X represents at least one alkaline earth metal excluding barium, X' represents at least one alkaline earth metal, RE represents at least one element selected from the group consisting of rare earths, bismuth (Bi) and one of their combinations, Y represents at least one element selected from the group consisting of metalloids, of poor metals, non-metals and one of their combinations, M represents at least one transition metal, Z represents at least one element chosen from the group consisting of metalloids, non-metals and one of their combinations, 0 ≤ a1 ≤ 10 ≤ b1 ≤ 1 / 30 ≤ a2 ≤ 120 ≤ b2 < 120 ≤ c < 10 ≤ d < 1 e, f,g and h are greater than or equal to zero and strictly less than 1. Figure for the abstract: no figure.