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
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  • 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 sol

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0018] Example 1:

[0019] (1) Preparation of metal organic framework 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 with a mass concentration of 36.5%, stirred uniformly, and then placed in a closed reaction kettle, reacted at 70°C for 1 day to obtain an indium-containing metal organic framework.

[0021] (2) Ion exchange reaction between pyridine hemicyanine dye and acridine dye and metal organic framework:

[0022] Take 1 mg of pyridine semicyanine dye 4-(4-dimethylaminostyrene)-1-methylpyridine iodide salt and dissolve it in 100 mL of N,N dimethylformamide solvent, and then add 0.8 g of step (1 ) After the prepared metal-organic framework containing indium is subjected to ion exchange reaction for 3 hours, the reacted metal-organic framework is filtered ou...

Example Embodiment

[0024] Example 2:

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

[0026] Weigh 0.3mmol of 1,3,5-tris(4-carboxybenzene)benzoic acid and 2mmol of indium chloride 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% and stir. After homogenization, it is put into a closed reaction kettle and reacted at a constant temperature of 80°C for 2 days to obtain an indium-containing metal organic framework.

[0027] (2) Ion exchange reaction between pyridine hemicyanine dye and acridine dye and metal organic framework:

[0028] Take 3mg of pyridine semicyanine dye 4-(4-(diphenylaminostyrene)-1-methylpyridine iodide salt and dissolve it in 150mL of N,N dimethylformamide solvent, and then add 0.1g step ( 1) After the prepared metal organic framework containing indium is subjected to ion exchange reaction for 10 hours, the reacted metal organic framework is filtered out, and then added to the N,N dimethyl...

Example Embodiment

[0030] Example 3:

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

[0032] Weigh 0.7mmol of terephthalic acid and 2mmol of indium acetate 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% drop by drop, stir well, and put it into a closed reactor. React at a constant temperature for 7 days to obtain an indium-containing metal organic framework.

[0033] (2) Ion exchange reaction between pyridine hemicyanine dye and acridine dye and metal organic framework:

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

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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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