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A kind of preparation method of white fluorescent solid material

A solid material and fluorescence technology, which is applied in the field of preparation of white fluorescent solid materials, can solve the problems that solid white luminescent materials have never been reported, restrict the practical application of organic luminescent materials, and cannot be widely used, and achieve great promotion value. The effect of low manufacturing cost and improved service life

Active Publication Date: 2019-08-02
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, WOLED mainly has the following problems, which greatly limit the further development of the industry:
[0003] 1. Service life problem: Since OLEDs use small-molecule organic light-emitting materials, and the melting point of small organic molecules is generally below 300°C, many OLED manufacturers can only guarantee a product life of about 8,000 hours;
[0004] 2. Organic light-emitting materials have high fluorescence quantum efficiency in dilute solutions. When the solution concentration increases or in a solid state, the luminous efficiency decreases significantly due to aggregation, which seriously restricts the practical application of organic light-emitting materials.
[0006] To this end, the applicant has studied a white fluorescent aqueous solution that can be excited by blue light to generate white light, and applied for a patent (Patent No. CN201510273387.2). , PPV3 or PPV4 are mixed to prepare self-assembled supramolecules. Under the excitation of blue light, this solution can emit white light and obtain white light soft matter. However, because it is an aqueous solution, its application has certain limitations and cannot be widely used. application, and if this aqueous solution is made into a solid, it will not emit white light under the excitation of blue light
At the same time, at present, there is no report on the solid white luminescent material formed by the self-assembly of the melon-ring supramolecular host-guest

Method used

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  • A kind of preparation method of white fluorescent solid material
  • A kind of preparation method of white fluorescent solid material
  • A kind of preparation method of white fluorescent solid material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the preparation method of white fluorescent solid material, comprising:

[0035] (1) Weigh 0.59g of guest G and 1.5g of Q[7], put them into a 250mL round bottom flask, add 100mL of pH7.0 buffered aqueous solution (buffered aqueous solution is the aqueous solution after adjusting the pH value with acid and alkali, the same below), heat Reflux for 24 hours; spin dry the liquid with a rotary evaporator, and then wash with 20ml of acetone to obtain 1.96g of light white solid Q[7]-G, with a yield of 93.7%;

[0036] (2) Weigh 1.18g guest G, 1.7gQ[8], put them into a 250mL round bottom flask, add 100mL pH7.0 buffered aqueous solution, heat and reflux for 24h; spin dry the liquid with a rotary evaporator, then wash with 20ml acetone to obtain Light yellow solid Q[8]-G2.62g, yield 90.1%;

[0037] (3) Weigh 1.05g of Q[7]-G solid powder and 1.44g of Q[8]-G solid powder into 25ml of methyl methacrylate (MMA) and azobisisobutylcyanide solution, stir at 60°C for 15 min...

Embodiment 2

[0038] Embodiment 2: the preparation method of white fluorescent solid material, comprising:

[0039] (1) Weigh 0.59g guest G, 1.5gQ[7], put them into a 250mL round bottom flask, add 100mL pH8.0 buffer aqueous solution, heat and reflux for 40h; dry the liquid naturally, then wash with 20ml acetone to obtain a light white solid Q[7]-G1.96g, yield 94.1%;

[0040] (2) Weigh 1.18g guest G, 1.7gQ[8], put them into a 250mL round bottom flask, add 100mL pH8.0 buffered aqueous solution, heat and reflux for 40h; dry the liquid naturally, then wash with 20ml acetone to obtain a light yellow solid Q[8]-G2.62g, yield 90.5%;

[0041] (3) Weigh 1.05g of Q[7]-G solid powder and 1.44g of Q[8]-G solid powder into 25ml of methyl methacrylate (MMA) and azobisisobutylcyanide solution, stir at 45°C for 20 minutes , formed a transparent slurry after cooling. Spread the transparent paste evenly on the surface of the 5MM blue LED lamp and dry it. A solid LED material that emits white light can be...

Embodiment 3

[0042] Embodiment 3: the preparation method of white fluorescent solid material, comprising:

[0043] (1) Weigh 0.59g of guest G and 1.5g of Q[7], put them into a 250mL round bottom flask, add 100mL of pH 10 aqueous solution, heat and reflux for 100h; evaporate the liquid in a drying oven, and then wash with 20ml of acetone to obtain a light white solid Q[7]-G1.96g, yield 94.5%;

[0044] (2) Weigh 1.18g of guest G, 1.7gQ[8], put them into a 250mL round bottom flask, add 100mL of pH 10 aqueous solution, heat and reflux for 100h; evaporate the liquid in a drying oven, and then wash with 20ml of acetone to obtain a light yellow solid Q[8]-G2.62g, yield 91.2%;

[0045](3) Weigh 1.05g of Q[7]-G solid powder and 1.44g of Q[8]-G solid powder into 25ml of methyl methacrylate (MMA) and azobisisobutylcyanide solution, stir at 75°C for 30 minutes , formed a transparent slurry after cooling. Spread the transparent paste evenly on the surface of the 5MM blue LED lamp and dry it. A soli...

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Abstract

The invention discloses a preparation method of a white fluorescent solid material. The preparation method comprises the steps of respectively carrying out supramolecular assembly on cucurbit (7) uril Q [7] and a fluorescent molecule phenylene ethylene derivative as well as cucurbit (8) uril Q [8] and the fluorescent molecule phenylene ethylene derivative so as to obtain two solids, i.e. Q [7]-G and Q [8]-G; then, dispersing the Q [7]-G and the Q [8]-G in a polymethyl methacrylate solution to obtain transparent paste; drying the transparent paste to obtain the white fluorescent solid material. The white fluorescent material prepared by the method is a solid material and can emit white fluorescence when being excited by blue light, thus having a wider application scope; furthermore, the method provided by the invention has the characteristics of being simple and free from pollution in a preparation process.

Description

technical field [0001] The invention relates to a preparation method of a white fluorescent solid material, in particular to a preparation method of a white fluorescent solid material excited by blue light. Background technique [0002] White light, such as white light LED material (WOLED), as a new type of solid-state lighting device, has rapidly become the most promising in this century due to its advantages of energy saving, environmental protection, small size, long life, fast response, no radiation, no pollution, and flat packaging. new light source. At present, WOLED mainly has the following problems, which greatly limit the further development of the industry: [0003] 1. Service life problem: Since OLEDs use small-molecule organic light-emitting materials, and the melting point of small organic molecules is generally below 300°C, many OLED manufacturers can only guarantee a product life of about 8,000 hours; [0004] 2. Organic light-emitting materials have high fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/02
CPCC09K11/025C09K11/06C09K2211/1007C09K2211/1029
Inventor 倪新龙陈仕焰吴伟
Owner GUIZHOU UNIV