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Near blue fluorescent material and preparation method thereof

A blue fluorescence and crystal technology, applied in the field of fluorescent materials, can solve the problem of blue phosphors hindering the development of practical full-color display, and achieve good near blue light emission performance, favorable for electronic transition and energy transfer, and good photoelectric activity.

Inactive Publication Date: 2011-11-16
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lack of blue phosphors has been hindering the development of practical full-color displays, so finding blue light-emitting host materials with high efficiency, high stability, and high color purity has always been a research direction.

Method used

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  • Near blue fluorescent material and preparation method thereof
  • Near blue fluorescent material and preparation method thereof
  • Near blue fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] To a 25 mL polytetrafluoroethylene-lined stainless steel reactor was added quinoline carboxylic acid (12.3 mg, 0.05 mmol), zinc acetate (10.5 mg, 0.05 mmol), 4,4'-bipyridine (9.8 mg, 0.05 mmol) , potassium hydroxide (2.8mg, 0.05mmol), add water 10mL, stir to make it evenly mixed.

[0020] Seal the reaction kettle and put it in an oven, heat at 60°C for 24h; then cool it down to room temperature naturally, and open the reaction kettle to obtain colorless block crystals.

Embodiment 2

[0022] To a 25 mL polytetrafluoroethylene-lined stainless steel reactor was added quinoline carboxylic acid (24.6 mg, 0.10 mmol), zinc acetate (101.0 mg, 0.50 mmol), 4,4'-bipyridine (99.0 mg, 0.50 mmol) , potassium hydroxide (5.6mg, 0.10mmol), add water 15mL, stir to make it evenly mixed.

[0023] Seal the reaction kettle and place it in an oven, heat at 100°C for 48h; then cool down to room temperature naturally, and open the reaction kettle to obtain colorless block crystals.

Embodiment 3

[0025] To a 25 mL polytetrafluoroethylene-lined stainless steel reactor was added quinoline carboxylic acid (36.9 mg, 0.15 mmol), zinc acetate (31.5 mg, 0.15 mmol), 4,4'-bipyridine (19.8 mg, 0.10 mmol) , potassium hydroxide (11.2mg, 0.20mmol), add 20mL of water, stir to make it evenly mixed.

[0026] Seal the reaction kettle and place it in an oven, heat at 120°C for 72h; then cool it down to room temperature naturally, and open the reaction kettle to obtain colorless blocky crystals.

[0027] The obtained colorless block crystals are rinsed with distilled water and air-dried naturally; after determination, the molecular formula of the zinc quinoline carboxylic acid crystals is C 84 h 56 N 8 o 8 Zn 2 , the crystal system is triclinic, the space group is P-1, and the unit cell parameters α=91.357°, γ=106.573°, β=101.953°, zinc ions have two coordination modes: one is tetragonal pyramid coordination mode, and the two nitrogen coordination atoms come from two differen...

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Abstract

The invention discloses a near blue fluorescent material and a preparation method thereof. The material is prepared through chemical reactions of quinoline carboxylic acid and 4,4'-bipyridine with conjugated extended pi bonds, and zinc ions with optical activity. The fluorescent material is a zinc quinoline carboxylic crystal with a molecular formula of C84H56N8O8Zn2. The crystal belongs to a crystal system of triclinic system, and a space group of P-1. Cell parameters of the crystal are that: alpha= 91.357 DEG, gamma=106.573 DEG, and beta=101.953DEG. The zinc ions have two coordination modes, one is a square pyramid coordination mode, wherein two nitrogen coordinating atoms come from two different 4,4'-bipyridines, and three oxygen coordinating atoms come from two different quinoline carboxylic acid ligands; the other is a octahedral coordination mode, wherein two nitrogen coordinating atoms come from two different 4,4'-bipyridines, and four oxygen coordinating atoms come from two different quinoline carboxylic acid ligands. The material is advantaged in that: the fluorescent material contains abundant optically active Zn (II) ions and conjugated extended bonds, and has good near blue light emission performance.

Description

technical field [0001] The invention relates to a fluorescent material, in particular to a near-blue fluorescent material and a preparation method thereof. Background technique [0002] Fluorescent materials usually refer to materials that can absorb and store energy after receiving external energy, and convert it into light energy in a dark place. Introducing optically active metal ions or organic ligands containing conjugated units into fluorescent materials can greatly improve the luminescent properties of fluorescent materials. The sensitizer can be used to prepare fluorescent materials with various optical effects by using organic ligands containing different conjugated units to cooperate with metal ions. It is widely used in decoration, anti-counterfeiting, identification, medical treatment, commodity inspection and many other fields. [0003] Fluorescent materials can be roughly divided into the following three categories according to the material structure: (a) arom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07F3/06
Inventor 李星邴月査美琴
Owner NINGBO UNIV
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