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d-a type organic doped crystal afterglow material that can be excited by ultraviolet-visible light and its preparation method

A D-A, visible light technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve problems such as unfavorable afterglow

Active Publication Date: 2020-10-27
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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  • d-a type organic doped crystal afterglow material that can be excited by ultraviolet-visible light and its preparation method
  • d-a type organic doped crystal afterglow material that can be excited by ultraviolet-visible light and its preparation method
  • d-a type organic doped crystal afterglow material that can be excited by ultraviolet-visible light and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0037] The donor material D (W) and the acceptor material A (PPT) are uniformly mixed to obtain a solid powder, and the solid powder is added to absolute ethanol to obtain a suspension. The suspension is sonicated for 1 min, and then placed in an atmospheric environment at a room temperature of 20-25℃ Let stand for 1 hour, the crystals produced at the bottom of the liquid are DA type organic doped crystal afterglow materials (W / PPT), where, calculated by mole, the ratio of donor material D to acceptor material A is 1:100; The concentration of the solid powder in the liquid is 10 mg / mL.

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

[0039]

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

[0041] Among them, the structural formulas of R1 and R2 are both

[0042] The reaction formula of the preparatio...

Embodiment 2

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

[0051] The donor material D (2M-W) and the acceptor material A (PPT) were uniformly mixed to obtain a solid powder, and the solid powder was added to absolute ethanol to obtain a suspension. The suspension was sonicated for 2 minutes, and then heated at room temperature 20-25℃ Let stand for 3 hours in the atmosphere, the crystals produced at the bottom of the liquid are DA type organic doped crystal afterglow materials (2M-W / PPT), where, calculated by mole, the ratio of donor material D to acceptor material A is 1. : 100; The concentration of the solid powder in the suspension is 10 mg / mL.

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

[0053]

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

[0055]

[0056] Among them, the structural formulas of R1 and R2 are:

[0057]

[0058] The react...

Embodiment 3

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

[0065] The donor material D (4M-W) and the acceptor material A (PPT) were uniformly mixed to obtain a solid powder, and the solid powder was added to absolute ethanol to obtain a suspension. The suspension was sonicated for 2 minutes, and then heated at room temperature at 20-25°C. Let stand for 3 hours in the atmosphere, the crystals produced at the bottom of the liquid are DA type organic doped crystal afterglow material (4M-W / PPT), where, calculated by mole, the ratio of the donor material D and the acceptor material A is 1. : 100; The concentration of the solid powder in the suspension is 10 mg / mL.

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

[0067]

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

[0069]

[0070] Among them, the structural formulas of R1 and R2 are both

[0071] The reaction formula of the preparation method in Example 3 is...

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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 called light-storing luminescent materials, commonly known as luminous powders or long-lasting luminescent powders. The light-emitting principle is photoluminescence, that is, when excited by a light source, it stores excitation energy in an excited state, and when the excitation stops, the energy is slowly released in the form of light. In 1996, Matsuzawa et al. published Europium (Eu) and Dy (Dy) doped strontium aluminate (SrAl 2 O 4 ) System, the afterglow decay time can be as long as 10 hours and has high durability. Subsequently, this kind of long afterglow materials such as aluminates containing rare earth elements have...

Claims

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Application Information

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Patent Type & Authority Patents(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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