Preparation method of D-A type organic doped crystal afterglow material capable of being excited by ultraviolet-visible light

A D-A, visible light technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of unfavorable afterglow, and achieve the effect of good afterglow luminescence performance, afterglow time and brightness improvement

Active Publication Date: 2020-03-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The luminescence mechanism of crystalline LPL materials is usually relatively clear, but the packing characteristics of crystals determine that there are significant non-radiative transitions in such materials, which is not conducive to the generation of afterglow

Method used

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  • Preparation method of D-A type organic doped crystal afterglow material capable of being excited by ultraviolet-visible light
  • Preparation method of D-A type organic doped crystal afterglow material capable of being excited by ultraviolet-visible light
  • Preparation method of D-A type organic doped crystal afterglow material capable of being excited by ultraviolet-visible light

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Experimental program
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Effect test

Embodiment 1

[0036] A preparation method of a D-A type organic doped crystal afterglow material that can be excited by ultraviolet-visible light, comprising the following steps:

[0037] Mix the donor material D (W) and the acceptor material A (PPT) uniformly to obtain a solid powder, add the solid powder to absolute ethanol to obtain a suspension, ultrasonicate the suspension for 1 min, and then place it in an atmospheric environment at room temperature 20-25 °C After standing for 1 hour, the crystals produced at the bottom of the liquid are D-A type organic doped crystal afterglow materials (W / PPT), wherein, calculated by molar ratio, the ratio of donor material D to acceptor material A is 1:100; The concentration of solid powder in the liquid is 10mg / mL.

[0038] The structural formula of acceptor material A is:

[0039]

[0040] The structural formula of the donor material D is:

[0041] Wherein, the structural formulas of R1 and R2 are

[0042] The reaction formula of prepar...

Embodiment 2

[0050] A method for preparing a D-A type organic doped crystal afterglow material (2M-W / PPT) that can be excited by ultraviolet-visible light, comprising the following steps:

[0051] Mix the donor material D (2M-W) and the acceptor material A (PPT) uniformly to obtain a solid powder, add the solid powder to anhydrous ethanol to obtain a suspension, ultrasonicate the suspension for 2 minutes, and then place it in a room temperature of 20-25°C After standing for 3 hours in the atmospheric environment, the crystals produced at the bottom of the liquid are D-A type organic doped crystal afterglow materials (2M-W / PPT), in which, calculated by molar ratio, the ratio of the donor material D to the acceptor material A is 1 : 100; the concentration of solid powder in the suspension is 10mg / mL.

[0052] The structural formula of acceptor material A is:

[0053]

[0054] The structural formula of the donor material D is:

[0055]

[0056] Wherein, the structural formulas of R1 a...

Embodiment 3

[0064] A preparation method of a D-A type organic doped crystal afterglow material, comprising the following steps:

[0065] Mix the donor material D (4M-W) and the acceptor material A (PPT) uniformly to obtain a solid powder, add the solid powder to anhydrous ethanol to obtain a suspension, ultrasonicate the suspension for 2 minutes, and then place it in a room temperature of 20-25°C After standing for 3 hours in the atmospheric environment, the crystals produced at the bottom of the liquid are D-A type organic doped crystal afterglow materials (4M-W / PPT), in which, calculated by molar ratio, the ratio of donor material D to acceptor material A is 1 : 100; the concentration of solid powder in the suspension is 10mg / mL.

[0066] The structural formula of acceptor material A is:

[0067]

[0068] The structural formula of the donor material D is:

[0069]

[0070] Wherein, the structural formulas of R1 and R2 are

[0071] The reaction formula of preparation method am...

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Abstract

The invention discloses a preparation method of a D-A type organic doped crystal afterglow material capable of being excited by ultraviolet-visible light. The method comprises the following steps: uniformly mixing a donor material D and an acceptor material A to obtain solid powder, adding the solid powder into absolute ethyl alcohol to obtain a suspension liquid, performing ultrasonic treatment on the suspension liquid for 1-2 minutes, and standing for 1-3 hours in an atmospheric environment at a room temperature of 20-25 DEG C to obtain a crystal generated at the bottom of the liquid, ie., the D-A type organic doped crystal afterglow material, wherein a molar ratio of the donor material D to the acceptor material A is (0.5-10):100, and the concentration of the solid powder in the suspension liquid is 10 mg / mL. According to the invention, the afterglow time of most of the crystal afterglow materials in the prior art is less than 2 s while the afterglow time of the D-A type organic doped crystal afterglow material exceeds 3 s, so that the increase of the afterglow time is beneficial to the application of organic crystalline LPL materials.

Description

technical field [0001] The invention belongs to the technical field of organic long afterglow crystal materials, and specifically relates to a D-A type organic doped crystal afterglow material that can be excited by ultraviolet-visible light and a preparation method thereof. Background technique [0002] Long Persistent Luminescence (LPL) materials are also known as light-storing luminescent materials, commonly known as luminous powder or long afterglow powder. Its luminescence principle is photoluminescence, that is, when excited by a light source, the excitation energy is stored in the excited state, and when the excitation stops, the energy is slowly released in the form of light. In 1996, Matsuzawa et al. published strontium aluminate (SrAl) doped with europium (Eu) and dysprosium (Dy). 2 o 4 ) system, the afterglow decay time can be as long as 10 hours and has high durability. Subsequently, such long afterglow materials such as aluminates containing rare earth elemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
CPCC09K11/06C09K2211/1011C09K2211/1014C09K2211/1092
Inventor 汪天洋胡文平冯文慧韩江丽
Owner TIANJIN UNIV
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