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Rare earth-organic framework material incorporating organic dye and preparation method thereof

A technology of organic frameworks and organic dyes, applied in luminescent materials, chemical instruments and methods, climate sustainability, etc., can solve problems such as the impact of luminescent properties, achieve enhanced chemical thermal stability, reduce the probability of non-radiative transitions, and achieve The effect of color rendering index

Active Publication Date: 2021-04-20
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0005] However, due to the influence of rare earth metal ions, organic ligands, hosts, and guest dyes on the luminescent performance, there are many luminescent sites and many types of luminescence. The final light color is the mixture of light emitted by all luminescent sites. may vary

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  • Rare earth-organic framework material incorporating organic dye and preparation method thereof
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  • Rare earth-organic framework material incorporating organic dye and preparation method thereof

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preparation example Construction

[0042] Further, the preparation method of the rare earth-organic framework material incorporating an organic dye comprises the following steps:

[0043] Dissolve organic ligands, europium salts, terbium salts, and pyrene in a mixed solvent, and react at 85-95°C for 46-50 hours; after the reaction, the sample is centrifuged and washed with a mixed solvent until the supernatant is irradiated by a UV lamp Until the blue fluorescence does not appear, the rare earth-organic framework material with organic dyes can be obtained by drying;

[0044] The mixed solvent is composed of an organic solvent and water, and the volume ratio of the organic solvent to water is preferably 0.9 to 1.1:1;

[0045] The organic solvent is preferably N,N-dimethylformamide.

[0046] Preferably, the molar volume ratio of the ligand to the mixed solvent is: 0.0197~0.0178mol / L, and the molar ratio of the organic ligand: europium salt: terbium salt: pyrene is preferably: 0.75:0.1~0.2:1.8~ 1.9:0.5~1.

[0047...

Embodiment 1

[0057] 0.75 mmol of biphenyl polycarboxylic acid ligand, 0.15 mmol of europium salt, 1.85 mmol of terbium salt and 0.5 mmol of pyrene were dissolved in a mixed solvent of 20 ml of DMF and 20 ml of water. Stir with a glass rod until almost dissolved. The basically dissolved suspension was transferred to a polytetrafluoroethylene reaction kettle, stoppered and reacted at a constant temperature of 90° C. for 48 hours. After the reaction, the sample was centrifuged, and the sample was washed several times with a mixed solvent of organic solvent DMF and water with a volume ratio of 1:1 until the supernatant did not show blue fluorescence under the irradiation of an ultraviolet lamp, and was introduced after drying. Rare earth-organic framework materials for organic dyes.

[0058] The synthesized rare earth-organic framework material introduced with organic dyes was excited with an excitation wavelength of 355nm, and the maximum peaks of the emission spectra were located at 417nm, ...

Embodiment 2

[0060] 0.75 mmol of biphenyl polycarboxylic acid ligand, 0.15 mmol of europium salt, 1.85 mmol of terbium salt and 1 mmol of pyrene were dissolved in a mixed solvent of 20 ml of DMF and 20 ml of water. Stir with a glass rod until almost dissolved. The basically dissolved suspension was transferred to a polytetrafluoroethylene reaction kettle, stoppered and reacted at a constant temperature of 90° C. for 48 hours. After the reaction, the sample was centrifuged, and the sample was washed several times with a mixed solvent of organic solvent DMF and water with a volume ratio of 1:1 until the supernatant did not show blue fluorescence under the irradiation of ultraviolet light. After drying, the introduced organic Rare earth-organic framework materials for dyes.

[0061] The synthesized rare earth-organic framework material introduced with organic dyes was excited with an excitation wavelength of 355nm, and the maximum peaks of the emission spectra were located at 417nm, 550nm an...

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Abstract

The invention relates to a rare earth-organic framework material introduced with an organic dye and a preparation method thereof, belonging to the technical field of luminescent materials. The rare earth-organic framework white light-emitting material incorporating organic dyes of the present invention includes a rare earth-organic framework and pyrene, and the rare earth-organic framework contains europium and terbium; the rare earth-organic framework is a porous material formed by europium, terbium and organic ligands The frame of the channel, the pyrene enters the porous channel as a guest molecule. The invention innovatively introduces the organic dye pyrene as a guest into the white light emitting material, which proves the feasibility of using the dye in this field. The preparation method of the present invention adopts a one-step synthesis method to prepare the rare earth-organic framework material with organic dyes, which simplifies the traditional synthesis steps, makes the preparation process of the material simpler, and increases the rare earth-organic framework material with organic dyes. Feasibility in actual production.

Description

technical field [0001] The invention relates to a rare earth-organic framework material introduced with an organic dye and a preparation method thereof, belonging to the technical field of luminescent materials. Background technique [0002] Luminescent materials have become one of the research hotspots because of their wide application in many fields. At present, more studies are made on applying luminescent materials to light-emitting diodes (LEDs), traffic instructions, and anti-counterfeiting. High luminous efficiency, good stability, and long service life have become indicators for measuring the practical application of luminescent materials. In recent years, white LEDs have entered the field of people's lives due to their low energy consumption, small size, and low heat generation. Most of the white LEDs sold on the market are made of pure inorganic materials, but they need to be further improved in terms of service life and luminous performance. [0003] Metal-orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06
CPCC08G83/008C09K11/06C09K2211/182Y02B20/00
Inventor 张佩聪高庆邱克辉杜海英黄艺倪师军李峻峰张文涛周敬修王甜巨力黄滔滔
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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