20 results about "Dual emission" patented technology

The invention discloses a rare earth metal polymer with multiple stimulation responsiveness and a preparation method thereof, two monomers SP and VTPY are mixed with methyl methacrylate (MMA) according to a certain proportion, a polymer skeleton Poly (VTPY-co-SP-co-MMA) is prepared through a free radical polymerization reaction, the polymer and Tb (Com) 3.2 H2O are further subjected to a coordination reaction according to a specific proportion, and the rare earth metal polymer with multiple stimulation responsiveness is obtained. The Poly-Tb (Coum) 3 with the stimuli-responsive discoloration characteristic is prepared by the aid of the method. The rare earth metal polymer with methyl methacrylate as a framework and rare earth terbium ions and spiropyran monomers as double emission centers is synthesized, has multiple stimulation response characteristics, provides a brand new strategy and possibility for development of rare earth-based multifunctional intelligent materials, and has wide application prospects. An innovative solution is provided for development of a thermal enhanced rare earth luminescent material, the thermosensitive fluorescence response performance of the material is greatly improved, and a new thought is provided for design of an intelligent temperature response type rare earth luminescent material.

The invention discloses a rare earth homologous dual-emission high-resolution deep imaging method based on deep learning enhancement. A plurality of long-life intermediate states of lanthanide upconversion nanoparticles (UCNPs) are utilized, a single 980nm pumping source is used for exciting Tm < 3 + > / Yb < 3 + > co-doped UCNPs, and two-photon fluorescence with higher penetrability and four-photon fluorescence with higher resolution are induced at the same time. By combining a dual-mechanism CycleGAN artificial neural network based on antagonism training and cyclic consistency constraint, cross-domain mapping between two fluorescence signals is established, and the advantages of two fluorescence imaging are cooperatively utilized, so that deep penetration and high-resolution imaging are realized. According to the invention, in a self-established wide-field microscopic imaging system, the resolution of 209nm of a single particle in a 808nm fluorescence channel can be realized, and the signal-to-background ratio is doubled. According to the invention, the technical bottleneck that the resolution and the penetration depth of a traditional multi-photon microscope in deep tissue imaging are mutually restricted is effectively solved.

The invention provides a single-component boron-nitrogen-doped dual-emission carbon quantum dot and a preparation method and application thereof.The carbon quantum dot is synthesized through a triaminophenylboronic acid one-step hydrothermal method, 370 nm and 420 nm dual-emission peaks are generated at the same time under 320 nm excitation, the average particle size ranges from 2.0 nm to 2.3 nm, the boron doping amount ranges from 8% to 12%, and the nitrogen doping amount ranges from 2.5% to 4.0%. The carbon quantum dot as a ratiometric fluorescent probe can simultaneously detect Fe < 3 + > and Hg < 2 + >, has detection limits of 0.069 [mu] M and 0.1524 [mu] M respectively, has linear response in a pH range of 8.0-13.0, and is successfully used for cell imaging. The problems that a traditional multi-component probe is complex in preparation and poor in stability are solved, multifunctional integrated detection is achieved, and the probe has wide application prospects in the fields of environmental monitoring and biomedicine.

The invention discloses equipment for promoting aging of receptor substances by generating kinetic energy at normal temperature and micro temperature, and relates to the technical field of aging and ripening, the equipment is composed of a basic carrier mechanism, a disturbance kinetic energy emission mechanism and an electromechanical control mechanism, and has multiple forms such as a carry-on type, a small flat plate type, a box type and a storage bearing frame type so as to meet different use scenes. The core is a dual emission source mechanism, far infrared rays are generated through the graphene layer and the functional weaving layer, and physical and chemical changes of acceptor substances are promoted. The equipment is simple and convenient to operate, easy to maintain and long in service life, is widely suitable for various substances needing to be aged, such as tea leaves, wines and wormwood products, can accelerate the aging process and improve the flavor in a relatively short time, and meanwhile, keeps the characteristics of environment friendliness and low energy consumption.

The invention discloses a side chain substituted triphenylmethyl free radical with light-operated dual-emission characteristics as well as a preparation method and application thereof, and relates to the technical field of organic light-emitting materials. The meta-position of a triphenylmethyl free radical is used as a modification part, aromatic substituents with different characteristics are introduced through a Suzuki reaction to regulate and control the high-energy-state electron energy level, so that the material has light-operated dual-emission performance, the variety of light-emitting free radicals can be expanded, the application of the material in more fields is further realized, and the application range of the material is widened. The compounds can be used in the fields of optical sensing, electroluminescent devices, biological imaging and the like. The problem that in the prior art, triphenylmethyl free radicals which are stable in side chain substitution, light-emitting and have light-operated dual-emission characteristics are lacked is solved.

The invention discloses preparation and property research of stable cuprous-doped carbon quantum dots, the carbon dots are synthesized from amino acid compounds and copper salt compounds by a traditional top-to-bottom water and hot method, and the preparation method comprises the following steps: mixing amino acid and copper salt, dissolving in ultrapure water, and stirring to obtain a mixed solution; and after ultrasonic dissolution, transferring the mixture into a polytetrafluoroethylene inner container, putting the inner container into a stainless steel high-pressure kettle, putting the stainless steel high-pressure kettle into a muffle furnace, and heating to obtain the carbon dots. After the reaction is completed, cooling to room temperature, centrifuging and collecting supernate, and finally freeze-drying to obtain the carbon dots. The target carbon dots Cu-CDs are confirmed through the characteristic fluorescence characteristics of a small animal living body imaging instrument and the valence state of copper in the carbon dots represented by XPS. The prepared target carbon dots are good in biocompatibility and low in cytotoxicity, meanwhile, the target carbon dots have visible light and near-infrared light dual-emission fluorescence, the catalytic process of Fenton reaction is more efficient due to the unique Cu < + > intermediate state structure, targeted and efficient treatment is achieved in specific microenvironments of diseased regions such as tumors, and integration of diagnosis and treatment of organism diseases is expected to be achieved.

The present invention provides a method for preparing and applying a cold white light lignin-based carbon dot composite material with dual fluorescence / phosphorescence emission. This method uses alkali lignin as a precursor, first synthesizing lignin-derived carbon dots via a hydrothermal method, then covalently bonding them to a boric acid matrix via high-temperature calcination, resulting in a single-component cold white light lignin-based carbon dot composite material. The raw materials used in this invention are renewable, inexpensive, and readily available. The resulting white light carbon dot material exhibits a high fluorescence quantum yield and excellent stability. It exhibits cold white fluorescence emission under ultraviolet light excitation and green phosphorescence emission upon removal of ultraviolet light. It can be used in the preparation of white light-emitting diodes or for anti-counterfeiting applications.

The present invention discloses a dual-emission metal ruthenium complex probe and its preparation method and application. The metal ruthenium complex probe has the characteristics of simple synthesis method and high yield. The metal ruthenium complex can not only detect the ratio luminescence of the β-amyloid protein fibrillation process in real time, but also perform ratio imaging analysis of β-amyloid protein fibers. The detection process has the characteristics of high reliability and accurate results. Compared with commercial single-emission probes, the detection accuracy of the metal ruthenium complex probe is significantly improved, demonstrating that the dual-emission metal ruthenium complex probe has good application prospects in the early detection of Alzheimer's disease.

The invention discloses a near-infrared dual-emission gold nanocluster and ZIF-8 composite material (NIR-GSH-AuNCs (at) beta-CD / ZIF-8) as well as a preparation method and application of the near-infrared dual-emission gold nanocluster and ZIF-8 composite material. The NIR-GSH-AuNCs (at) beta-CD / ZIF-8 is prepared by combining an endogenous near-infrared double-emission gold nanocluster (NIR-GSH-AuNCs (at) beta-CD) modified by sulfydryl-beta-cyclodextrin with the ZIF-8 through confinement packaging, and the endogenous near-infrared double-emission gold nanocluster (NIR-GSH-AuNCs (at) beta-CD / ZIF-8 is prepared by combining with the ZIF-8 through confinement packaging. Dispersion liquid of the composite material is a faint yellow solution under natural light, emits bright yellow fluorescence under irradiation of 365nm ultraviolet light, and shows near-infrared dual-emission fluorescence characteristics at 610nm and 810nm under exciting light of 437nm. The applicant discovers that after the NIR-GSH-AuNCs (at) beta-CD / ZIF-8 is in contact with silver ions, the intensity ratio (F610 / F810) of double emission peaks of the NIR-GSH-AuNCs (at) beta-CD / ZIF-8 regularly responds along with the change of the concentration of the silver ions, so that the ratio type quantitative detection of the silver ions can be realized, and the NIR-GSH-AuNCs (at) beta-CD / ZIF-8 is strong in anti-interference capability and high in sensitivity. When the concentration of silver ions is in a range of 0.02-5 [mu] mol / L, F610 / F810 and log (CAg < + >) are in a linear relationship, a standard curve equation is F610 / F810 = 2.68406. Log (CAg < + >) + 7.14637 (R2 = 0.9961), and the detection limit is as low as 0.0116 [mu] mol / L (S / N = 3). The method can quickly respond without complex pretreatment, and is suitable for accurate analysis of trace silver ions in complex matrixes (such as lake water, tap water and human serum).

The invention discloses a mononuclear 2, 2 ': 6', 2 ''-terpyridyl ruthenium (II) complex with electrochemiluminescence dual-emission performance, the chemical structural formula is shown in the specification, or the complex is formed by connecting 2, 2 ': 6', 2 ''-terpyridyl ligands with different substituents with tetraphenyl ethylene ligands with different substituents, and the complex is formed by synthesizing the 2, 2 ': 6', 2 ''-terpyridyl ruthenium (II) complex with the electrochemiluminescence dual-emission performance. And then chelating a ruthenium (II) ion in an NNN coordination mode to synthesize the metal complex illuminant consisting of a mononuclear 2, 2 ': 6', 2 ''-terpyridyl ruthenium (II) complex. The complex disclosed by the invention has strong electrochemical luminescence performance, can be applied to the sensing field, is wide in application prospect, provides reference for designing the mononuclear tridentate ruthenium (II) complex with good electrochemical luminescence performance, and expands the potential application of the mononuclear tridentate ruthenium (II) complex in related fields.

The invention discloses a super-hydrophobic coating with blue-red light dual-emission performance. The coating is prepared from the following raw materials: a high-molecular polymer, a carbon quantum dot / layered silicate super-hydrophobic composite material, a curing agent, a silane coupling agent and a solvent, the carbon quantum dot / layered silicate super-hydrophobic composite material is obtained by carrying out hydrothermal reaction on layered silicate, a nonionic surfactant, organic acid and a nitrogen-containing and sulfur-containing organic compound, generating carbon quantum dots on the surface and between layers of the layered silicate in situ, and then carrying out low surface energy treatment by the nonionic surfactant to construct a micro-nano layered structure. The coating material disclosed by the invention is a composite material with blue-red light dual emission and super-hydrophobic performance, can break through the limitation of single function and poor durability of a traditional material, provides a brand new solution for agricultural dust prevention and efficiency improvement and optical energy optimization and utilization, and has important significance and wide prospects for promoting the development of intelligent agriculture.

The invention discloses an ionic coumarin-based rare earth complex as well as a preparation method and application thereof, and belongs to the field of organic photoelectric functional materials. 3-acetyl-4-hydroxycoumarin and a methoxy substituted derivative 4-hydroxy-6-methoxy-3-acetocoumarin thereof are used as organic antenna chromophores; triethylamine is used as a counter cation to prepare a series of ionic high-luminescence rare earth complexes; wherein the Tb < 3 + > complex 2 shows the highest luminous efficiency value of the coumarin-based rare earth complex due to the proper triplet excited state energy level of a Coum ligand and the low symmetric D2d triangular dodecahedron spatial configuration of the Coum ligand; the edge of an excitation band of the OMe series complex 6-9 is widened to a visible region, and the obviously widened excitation window is combined with the ionic charge characteristics of the OMe series complex 6-9, so that the complex becomes a potential candidate for visible light activation application which is safer and deeper in penetration; the Dy < 3 + > complex 9 shows double emission characteristics of OMe-Coum blue fluorescence and Dy < 3 + > characteristic yellow phosphorescence, and high-quality single-component composite white light emission is realized by fusing the OMe-Coum blue fluorescence and the Dy < 3 + > characteristic yellow phosphorescence.

The present invention discloses a kind of dual-mode emission boron-doped silane functionalized carbon dot and its preparation method and application, relate to the field of food safety research. The preparation method comprises the following steps: nitrogen source material, 3-aminopropyl triethoxysilane and carbon source material are mixed and dissolved, heated for reaction, cooled and dialyzed to obtain silane functionalized carbon dot; boric acid, rhodamine B and water are added to the silane functionalized carbon dot obtained in step (1), heated for reaction, cooled and dried; the nitrogen source material is m-phenylenediamine; the carbon source material, nitrogen source material and 3-aminopropyl triethoxysilane molar ratio described in step (1) are (1.5-2): 1: 1.5. The boron-doped silane functionalized carbon dot of the present invention has good stability, fluorescence and phosphorescence dual emission signals and raw materials are easy to obtain, strong stability, and has great application potential in the field of food safety detection.

This invention relates to a ratiometric sensor based on UiO-66-NH2@TT-COF composite material and its preparation method. The ratiometric sensor based on UiO-66-NH2@TpTt-COF composite material is synthesized by using an interface growth method to coat a TpTt-COF shell onto the surface of UiO-66-NH2, resulting in a UiO-66-NH2@TpTt-COF composite material with dual emission properties. A ratiometric fluorescence sensor can then be constructed using this UiO-66-NH2@TpTt-COF composite material. This invention uses an interface growth method to coat a TpTt-COF shell onto the surface of UiO-66-NH2, thereby synthesizing a UiO-66-NH2@TpTt-COF composite material with dual emission properties, thus constructing a novel ratiometric fluorescence sensor. When used to detect tetracycline, it achieves high selectivity and high sensitivity, thus providing a novel synchronous response sensor for antibiotic detection and offering a new possibility for the use of core-shell MOF@COF composite materials in the field of food safety.

The application discloses a preparation method of host-guest doped methyl phthalate derivative and application of the host-guest doped methyl phthalate derivative in encryption and Fe(III) detection. The preparation method comprises the following steps: adding benzaldehyde, malononitrile, triethylamine, dimethyl butyne diacid and anhydrous dichloromethane into a reaction bottle, reacting at room temperature for 2 hours, and then obtaining the methyl phthalate derivative through separation and purification. The purified methyl phthalate derivative is doped with polymethyl methacrylate or polyvinyl alcohol at a weight ratio of 1:100, and then the doped material is uniformly mixed through dissolution, and the solvent is removed through heating at different temperatures to obtain a host-guest doped material with a double emission characteristic of thermal activation delayed fluorescence and room temperature phosphorescence. By using different phosphorescence emission wavelengths and afterglow life of the doped system, a high-level anti-counterfeiting pattern is constructed, and visual detection of Fe 3+ is realized.

This invention relates to the field of organic small molecule material detection technology, specifically to a molecular probe with dual excitation-dual emission-dual-mode dynamic monitoring function, its preparation method, and its application. The molecular probe is reacted with ClO in a DMF-water solution. ‑ Increased concentration exhibits a dual-excitation, dual-emission fluorescence response and a dual-mode dynamic monitoring response based on a direct red-blue colorimetric change in the solution; with increasing alkalinity, its fluorescence emission exhibits an "on-off" dynamic response of first red shift and then blue shift, along with a dual-detection signal of gradually darkening red light in the solution; it also shows a similar response to low-concentration ClO₂. ‑ Forming a binary system for SCN ‑ SiO3 2‑ It exhibits red fluorescence emission "off-on" and reacts with high concentrations of ClO. ‑ The resulting binary system exhibits a dual-signal response to acidic environments, displaying both on-off blue fluorescence emission and a readily apparent colorimetric change, and provides rapid and sensitive detection. The molecular probe provided by this invention boasts advantages such as mild synthesis conditions and simple preparation, creating favorable conditions for its widespread application.

The application discloses a kind of double-emission carbon dot hydrogel film and its preparation method and application, it is related to analysis detection and functional material technical field.The double-emission carbon dot hydrogel film with polyvinyl alcohol hydrogel as carrier, wherein uniformly dispersed with the double-emission carbon dot (O-CDs) synthesized with L-glutamic acid and o-phenylenediamine as precursor.O-CDs has dual emission peak of 400 nm and 530 nm under 375 nm excitation.Double-emission carbon dot hydrogel film is applied in Cu 2+ And Ag + Portable visual detection, which is a dual-mode measurement based on RGB, including fluorescence colorimetric assay in solution and smartphone-assisted visual detection film.The dual-mode strategy does not require sophisticated instruments, and can achieve rapid, reliable and simultaneous detection of Cu 2+ And Ag + Within 10 min, breaking through the limitations of traditional single-mode detection, and providing a robust platform for on-site metal ion monitoring.

The invention discloses a fluorescent probe based on dual-emission carbon quantum dots and application of the fluorescent probe in methanol detection, and belongs to the technical field of fluorescent probes. According to the preparation method, p-phenylenediamine (p-PD) is only used as a single precursor, the carbon quantum dots (p-PD CDs) with blue light and red light dual-emission characteristics are successfully prepared by regulating and controlling a solvent environment and adopting a two-step synthesis strategy, and the carbon quantum dots can be stably stored for a long time. The carbon quantum dot can quickly, simply, conveniently and efficiently identify and detect the methanol concentration in a methanol-ethanol system, by increasing the methanol content, the blue emission peak of the carbon quantum dot is subjected to red shift, the fluorescence intensity is gradually reduced, and the fluorescence intensity of the red emission peak is slightly reduced. The result shows that when the concentration of methanol is 0-60% and 70%-100%, the fluorescence intensity ratio of the carbon quantum dots and the concentration of methanol have a good linear relationship. Meanwhile, the carbon quantum dots can also be used for detecting low-concentration methanol in ethanol, and the detection limit is 0.38%.

This invention discloses a carbon quantum dot (CQD) and copper-silver alloy nanocluster hybrid dual-emission ratiometric fluorescent probe, its preparation method, and its application. The invention involves mechanically mixing short-wavelength emission CQDs with long-wavelength emission CuAgNCs at room temperature to form a CQDs-CuAgNCs fluorescent probe with dual emission characteristics. The ratio of the two emission peaks is used to construct a ratiometric fluorescent probe for the quantitative detection of L-cysteine. The invented CQDs-CuAgNCs dual-emission ratiometric fluorescent probe exhibits high selectivity and sensitivity.

The present invention discloses a rare earth doped adjustable visible-near infrared dual emission phosphor and a preparation method thereof. The chemical formula of the dual emission phosphor is Sr 5.82 Eu 0.18 Ge 2(1‑x) O7Cl6, where 0≤ x ≤0.12, based on halogen oxides and rare earth Eu 2+ As an activator. The raw materials are weighed according to the stoichiometric ratio, ground, placed in a sintering furnace, introduced into a reducing atmosphere, and sintered by a high-temperature solid-phase method to obtain a sintered body. The sintered body is ground to obtain a rare earth-doped adjustable visible-near-infrared dual-emission phosphor. This preparation method can change the intensity ratio of visible light and near-infrared light by adjusting the content of germanium, thereby accurately controlling the luminescent color and achieving white light and broadband near-infrared emission phenomena at the same time. The preparation method of the phosphor of the present invention is simple, low-cost, and the material is non-toxic, non-polluting, and non-radioactive, suitable for a wide range of applications.