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CN-119505601-B - Rare earth complex ink prepared by doping heat conducting material into pyrazole boron Ce (III) complex, preparation and application

CN119505601BCN 119505601 BCN119505601 BCN 119505601BCN-119505601-B

Abstract

The invention relates to rare earth complex ink with a heat conducting material doped with a pyrazole boron Ce (III) complex, and preparation and application thereof, belonging to the field of luminous display. During inkjet printing, an increase in printhead temperature may cause the rare earth complex particles in the ink to agglomerate, thereby affecting print uniformity and pattern quality. The addition of the heat conducting material is helpful for stabilizing the temperature of the ink, reducing the thermal motion of particles, preventing agglomeration and precipitation, improving the stability and reliability of printing, and ensuring the long-term work of the printing head.

Inventors

  • LUO JIAJUN
  • JIANG BORUI
  • Du hainan
  • HUANG WENLIANG

Assignees

  • 华中科技大学

Dates

Publication Date
20260505
Application Date
20241025

Claims (13)

  1. 1. A rare earth complex ink is characterized by comprising a pyrazole boron Ce (III) complex and a heat conducting material, and is shown in a structural formula Is that ; The structural formula of the pyrazole boron Ce (III) complex is as follows: ; wherein each R 1 、R 2 、R 3 、R 4 is independently selected from alkyl, aryl, phenyl, halogen, or halogen-substituted alkyl; The heat conducting material is boron nitride nanosheets or aluminum oxide nanoparticles.
  2. 2. The rare earth complex ink of claim 1, wherein the alkyl group is selected from the group consisting of C 1 -C 18 alkyl groups.
  3. 3. The rare earth complex ink of claim 1, wherein R 1 is-CH 3 ;R 2 is selected from C 1 -C 18 alkyl or halogen and R 3 is-CH 3 ;R 4 is selected from C 1 -C 18 alkyl or halogen.
  4. 4. The rare earth complex ink of claim 1, wherein the pyrazole boron Ce (III) complex is at least one of CeTp 3 、Ce(Tp 4Me ) 3 、Ce(Tp 4Br ) 3 、Ce(PzTp) 3 、Ce( i PrTp) 3 、Ce( n BuTp) 3 and Ce (PhTp) 3 ; the structure of CeTp 3 is as follows: ; the Ce (Tp 4Me ) 3 structure is as follows: ; The Ce (Tp 4Br ) 3 structure is as follows: ; The Ce (PZTp) 3 structure is as follows: ; the Ce ( i PrTp) 3 structure is as follows: ; the Ce ( n BuTp) 3 structure is as follows: ; the Ce (PhTp) 3 has the following structure: Or (b) 。
  5. 5. The rare earth complex ink of claim 1, wherein the thermally conductive material has a thermal conductivity greater than 40W/(m-K).
  6. 6. The rare earth complex ink of claim 1, wherein the thermally conductive material has a particle size in the range of 0.1 to 1 micron.
  7. 7. A method for preparing the rare earth complex ink as claimed in any one of claims 1 to 6, comprising the steps of: (1) Dissolving a pyrazole boron Ce (III) complex in a solvent containing benzene rings and chlorine elements; (2) And (2) adding a polymer and a heat conducting material into the solution obtained in the step (1), wherein the polymer comprises one or more of polystyrene, polymethyl methacrylate, polycarbonate or polyimide.
  8. 8. The process according to claim 7, wherein the solvent is o-dichlorobenzene or a mixed solvent of o-dichlorobenzene and dichlorobenzene.
  9. 9. The method according to claim 8, wherein the volume ratio of dichlorobenzene in the mixed solvent is 30% or less.
  10. 10. The method according to claim 7, wherein the concentration of the pyrazole boron Ce (III) complex in the solvent in the step (1) is 1 mg/ml to 10 mg/ml, the concentration of the polymer in the solution in the step (2) is 30 mg/ml to 250 mg/ml, and the concentration of the heat conducting material is 1 mg/ml to 10 mg/ml.
  11. 11. Use of a rare earth complex ink as claimed in any one of claims 1 to 6 for printing photoluminescent materials.
  12. 12. The use as claimed in claim 11 wherein the photoluminescent material is used to prepare a photoluminescent display device.
  13. 13. The use as claimed in claim 11, wherein the photoluminescent material is used as a security material or as a colour conversion material.

Description

Rare earth complex ink prepared by doping heat conducting material into pyrazole boron Ce (III) complex, preparation and application Technical Field The invention belongs to the field of luminous display, and particularly relates to rare earth complex ink doped with a pyrazole boron Ce (III) complex by a heat conducting material, and preparation and application thereof. Background Rare earth elements have a characteristic narrow bandwidth luminescence characteristic, and can generate accurate luminescence wavelength through electronic transition. The rare earth complex is used as a luminescent material, has higher luminous efficiency, and particularly has excellent performance in red, green and blue light areas, thus providing an efficient luminescent material for display technology and light source development. The rare earth complex generally has longer luminescence life, and the luminescence process is less influenced by external environment, so that the rare earth complex has good thermal stability and light stability. The characteristic enables the rare earth complex to still maintain high-efficiency stable luminous performance in a severe environment after long-time working. Along with the progress of the rare earth complex synthesis technology and the continuous emergence of novel luminescent materials, innovations in the fields of display technology, lighting technology, anti-counterfeiting technology, optical sensing and catalysis are promoted. The ink-jet printing technology of rare earth complex configuration ink is becoming an important method in modern material manufacturing due to its characteristics of precision, flexibility and high efficiency, especially in the aspects of anti-counterfeiting technology, display manufacturing and optical devices. Since the rare earth complex is usually present in the ink in the form of particles or nanoparticles, an increase in temperature can cause the particles to agglomerate, precipitate, and even affect the optical properties of the rare earth complex. Thermal management of the ink is therefore a critical issue in rare earth complex inkjet printing applications. In addition, in practical application, the luminescence process of the rare earth complex is highly sensitive to temperature, and especially in equipment with high-power excitation or long-time operation, the thermal effect can cause problems of reduced luminescence efficiency, aggravated light attenuation and the like. Disclosure of Invention The invention aims to provide a preparation method and application of rare earth complex ink with a heat conducting material doped with a pyrazole boron Ce (III) complex, which are characterized by effectively solving the problem of thermal management in the inkjet printing process and ensuring the luminous efficiency of the rare earth complex, the precision of a printed pattern and the stability of the ink. The heat conduction material avoids local overheating by optimizing a heat conduction path, and reduces photoluminescence efficiency reduction and particle agglomeration phenomena of the rare earth complex. According to a first aspect of the invention, there is provided a rare earth complex ink comprising a pyrazole boron Ce (III) complex and a thermally conductive material, the ink having the formulaIs that The structural formula of the pyrazole boron Ce (III) complex is as follows: Wherein each R 1、R2、R3、R4 is independently selected from alkyl, aryl, phenyl, halogen, or halogen-substituted alkyl. Preferably, the alkyl is selected from the group consisting of alkyl of C 1-C18. Preferably, R 1 is-CH 3;R2 is selected from C 1-C18 alkyl or halogen and R 3 is-CH 3;R4 is selected from C 1-C18 alkyl or halogen. Preferably, the pyrazole boron Ce (III) complex is at least one of CeTp3、Ce(Tp4Me)3、Ce(Tp4Br)3、Ce(PzTp)3、Ce(iPrTp)3、Ce(nBuTp)3 and Ce (PhTp) 3; the structure of CeTp 3 is as follows: the Ce (Tp 4Me)3 structure is as follows: The Ce (Tp 4Br)3 structure is as follows: The Ce (PZTp) 3 structure is as follows: the Ce (iPrTp)3 structure is as follows: the Ce (nBuTp)3 structure is as follows: the Ce (PhTp) 3 has the following structure: Preferably, the thermal conductivity of the thermally conductive material is greater than 40W/(m·k); Preferably, the particle size of the thermally conductive material is in the range of 0.1-1 micron. Preferably, the thermally conductive material is boron nitride nanoplatelets or alumina nanoparticles. According to another aspect of the present invention, there is provided a method for preparing rare earth complex ink, comprising the steps of: (1) Dissolving a pyrazole boron Ce (III) complex in a solvent containing benzene rings and chlorine elements; (2) And (2) adding a polymer and a heat conducting material into the solution obtained in the step (1), wherein the polymer comprises one or more of polystyrene, polymethyl methacrylate, polycarbonate or polyimide. Preferably, the solvent is o-dichlorobenzene or a mixed solvent