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Dye/metal-organic framework composite material for white light emission and preparation method thereof

A technology of metal-organic frameworks and composite materials, which is applied in the field of dye/metal-organic framework composite materials for white light emission and its preparation, can solve the problems of low thermochemical stability and low luminous efficiency, and achieve enhanced luminous intensity and Luminous quantum efficiency, simple synthesis process, and high yield

Active Publication Date: 2014-04-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a dye / metal organic framework composite material for white light emission and its preparation method to solve the problem of low luminous efficiency and low thermochemical stability of organic fluorescent dye molecules in solid state due to concentration quenching problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of metal-organic frameworks containing indium:

[0020] Weigh 0.1mmol [1,1′:4″,1″-terphenyl]-3,3″,5,5″-tetracarboxylic acid ligand and 1mmol indium chloride and dissolve in 60mL N,N-dimethylformaldehyde A mixed solvent of amide and 10 mL of water was added dropwise to 0.1 μL of 36.5% hydrochloric acid, stirred evenly, then placed in a closed reaction kettle, and reacted at a constant temperature of 70 °C for 1 day to obtain a metal-organic framework containing indium.

[0021] (2) Ion-exchange reactions of pyridine hemicyanine dyes and acridine dyes with metal-organic frameworks:

[0022] Get 1 mg of pyridine hemicyanine dye 4-(4-dimethylaminostyrene)-1-picoline iodide and dissolve it in 100 mL of N,N dimethylformamide solvent, then add 0.8 g of step (1 ) prepared indium-containing metal-organic framework for ion-exchange reaction for 3 hours, filtered to take out the reacted metal-organic framework, and then added to N,N dimethyl formazan containing 0....

Embodiment 2

[0025] (1) Preparation of metal-organic frameworks containing indium:

[0026] Weigh 0.3mmol of 1,3,5-tris(4-carboxybenzene)benzoic acid and 2mmol of indium chloride dissolved in a mixed solvent of 100mL of ethanol and 20mL of water, add 0.3μL of hydrochloric acid with a mass concentration of 36.5% dropwise and stir After uniformity, put it into a closed reaction kettle, and react at a constant temperature of 80° C. for 2 days to obtain a metal-organic framework containing indium.

[0027] (2) Ion-exchange reactions of pyridine hemicyanine dyes and acridine dyes with metal-organic frameworks:

[0028] Get 3mg of pyridine hemicyanine dye 4-(4-(dianilinostyrene)-1-picoline iodide salt and dissolve it in 150mL of N,N dimethylformamide solvent, then add 0.1g step ( 1) After the prepared metal-organic framework containing indium was subjected to ion exchange reaction for 10 hours, the reacted metal-organic framework was taken out by filtration, and then added to N,N dimethyl The ...

Embodiment 3

[0031] (1) Preparation of metal-organic frameworks containing indium:

[0032] Weigh 0.7mmol of terephthalic acid and 2mmol of indium acetate dissolved in a mixed solvent of 100mL of tetrahydrofuran and 50mL of water, add 0.5μL of hydrochloric acid with a mass concentration of 36.5% dropwise and stir evenly, then put it into a closed reaction kettle, ℃ constant temperature reaction for 7 days to obtain a metal organic framework containing indium.

[0033] (2) Ion-exchange reactions of pyridine hemicyanine dyes and acridine dyes with metal-organic frameworks:

[0034]Take 5 mg of pyridine hemicyanine dye 4-(4-dimethylaminostyrene)-1-methylpyridine sulfonate and dissolve it in 200 mL of DMF solvent, then add 1 g of indium-containing metal prepared in step (1) After the organic framework undergoes ion exchange reaction for 1 hour, the reacted metal-organic framework is taken out by filtration, and then added to N,N dimethylformamide solution containing 10 mg of acridine dye acri...

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Abstract

The invention discloses a dye / metal-organic framework composite material for white light emission. The dye / metal-organic framework composite material for white light emission is composed of 70-90% of indium-containing metal-organic framework, 5-15% of pyridine hemicyanine dye and 5-15% of acridine dye by molar percent. The preparation method comprises the steps of: firstly, synthesizing the indium-containing metal-organic framework from a benzene polycarboxylic acid organic ligand and an indium salt through a solvothermal reaction, and secondly, introducing the pyridine hemicyanine dye and the acridine dye into the indium-containing metal-organic framework by the ion exchange method to obtain the dye / metal-organic framework composite material. The synthetic method is simple in process and mild in conditions; the raw materials are easy to get and the yield of the dye / metal-organic framework composite material is high; the prepared dye / metal-organic framework composite material is high in chemical stability; the chromaticity coordinates of the emitted color are quite close to the chromaticity coordinates of the ideal white light; the color rendering index of the composite material is higher than 80 and the luminous quantum efficiency of the composite material is greater than 20%; therefore, the dye / metal-organic framework composite material for white light emission is expected to be applied to the fields of display and light emitting devices and the like as a novel white light emitting material.

Description

technical field [0001] The invention relates to a dye / metal organic framework composite material for white light emission and a preparation method thereof. Background technique [0002] The application of luminescent materials in many fields such as fluorescent lamps, plasma flat panel displays, optical switches, and light-emitting diodes has made it a research hotspot in the international forefront in the past ten years. Designing and developing luminescent materials with long life, low energy consumption and high efficiency is the goal pursued by many physicists and chemists. The advantages of small size, low heat generation, low power consumption, and long life make white LEDs a new generation of energy-saving light sources. The traditional LED white light phosphor is a combination of phosphors of various colors, and there is no single phosphor. Moreover, traditional phosphors have disadvantages such as low color rendering index, low color temperature, and low luminous ...

Claims

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Application Information

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IPC IPC(8): C09K11/07
CPCY02B20/00
Inventor 崔元靖张格格宋涛徐裕郁建灿杨雨王智宇钱国栋
Owner ZHEJIANG UNIV
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