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Organic light-emitting material as well as preparation method and application thereof

A light-emitting material and organic technology, which is applied in the preparation and application of light-emitting materials and organic compounds, can solve the problems of low molecular conjugation, and achieve the effect of simple purification method and simple synthesis steps

Active Publication Date: 2021-09-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, these compounds are often non-aromatic, and the degree of molecular conjugation is low. So far, through simple molecular design and preparation processes, long-wavelength emission, high quantum efficiency, room temperature phosphorescence (room temperature phosphorescence, RTP), and even Atypical luminescent materials for ultralong-lived room-temperature phosphorescence (p-RTP) remain a challenge

Method used

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  • Organic light-emitting material as well as preparation method and application thereof
  • Organic light-emitting material as well as preparation method and application thereof
  • Organic light-emitting material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Preparation of TMAB crystals

[0047] At 60°C, add 2g of commercially available TMAB solid powder into the reactor, stir with 50ml of ethanol to make it dissolve as much as possible, and slowly add an appropriate amount of ethanol to the reactor under stirring to completely dissolve the TMAB solid, then let it stand for cooling. It slowly precipitated crystals, separated by suction filtration, and vacuum-dried to obtain TMAB crystals.

[0048] figure 2 It is the spectrum diagram of crystalline TMAB excited by (a) 254nm at room temperature, wherein the dotted line is the fluorescence spectrum, and the solid line is the phosphorescence spectrum (delay = 1ms); the lifetime diagram excited by (b) 254nm.

[0049] At room temperature, under the irradiation of 254nm ultraviolet rays, TMAB crystals have blue-white luminescence, from figure 2 It can be seen from the spectral test results at medium room temperature that the maximum fluorescence emission peak of TMAB is 400nm. ...

Embodiment 2

[0051] Preparation of CTAB crystals

[0052] At 60°C, add 2g of commercially available TMAB solid powder into the reactor, stir with 10ml of ethanol to make it dissolve as much as possible, and slowly add an appropriate amount of ethanol to the reactor under stirring to completely dissolve the TMAB solid, then let it stand for cooling, and wait for It slowly precipitated crystals, separated by suction filtration, and vacuum dried to obtain a purified CTAB crystal sample.

[0053] image 3 It is the spectrum diagram of crystalline CTAB excited by (a) 254nm at room temperature, wherein the dotted line is the fluorescence spectrum, and the solid line is the phosphorescence spectrum (delay = 1ms); the lifetime diagram excited by (b) 254nm.

[0054] At room temperature, under the irradiation of 254nm ultraviolet rays, CTAB crystals have blue luminescence, and after turning off the ultraviolet light, a green afterglow can be observed, from image 3 From the spectral test results a...

Embodiment 3

[0056] Preparation of CTAC crystals

[0057] At room temperature, add 2g of commercially available CTAC solid powder to a 25ml sample bottle, stir with 10ml of methanol to dissolve it completely, place the sample bottle in a 100ml jar filled with 20mL of anhydrous ether, and let the ether slowly volatilize into the sample bottle, after a large amount of crystals are precipitated. Separation by suction filtration and vacuum drying to obtain a purified CTAC crystal sample.

[0058] Figure 4 It is the spectrum diagram of crystalline CTAC excited by (a) 254nm at room temperature, where the dotted line is the fluorescence spectrum, and the solid line is the phosphorescence spectrum (delay = 0.1ms); the lifetime diagram excited by (b) 254nm.

[0059] At room temperature, under the irradiation of 254nm ultraviolet rays, CTAC crystals emit blue light, and after turning off the ultraviolet light, a green afterglow can be observed, from Figure 4 From the spectral test results at me...

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Abstract

The invention relates to an organic light-emitting material as well as a preparation method and application thereof, wherein the preparation method of the organic light-emitting material comprises the steps: dissolving a compound containing a quaternary ammonium structure in an alcohol solvent, standing until crystals are separated out, filtering, separating, and drying in vacuum to obtain the organic light-emitting material, wherein the compound containing the quaternary ammonium structure comprises one or more of tetramethylammonium bromide (TMAB), cetyltrimethylammonium bromide (CTAB), cetyltrimethylammonium chloride (CTAC) or cetyltrimethylammonium iodide (CTAI), and further comprises a double-end quaternary ammonium salt compound, and the material is applied to the optical field and / or the anti-counterfeiting and / or secrecy field. Compared with the prior art, the method has the advantages of simple synthesis steps, simple purification method and the like.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to an organic luminescent material and its preparation method and application. Background technique [0002] At present, pure organic light-emitting materials have attracted much attention because of their important basic research value and their wide application prospects in the fields of organic light-emitting diodes, anti-counterfeiting encryption, sensing, and biological imaging. With the deepening of research on pure organic light-emitting materials, atypical light-emitting compounds that do not contain traditional large conjugated structures but also have intrinsic light-emitting properties have attracted extensive research interest. Compared with traditional organic light-emitting compounds that must contain significant conjugated structures Luminescent compounds, atypical luminescent compounds have the advantages of good biocompatibility, environmental friendliness, hydr...

Claims

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Application Information

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IPC IPC(8): C07C209/00C07C209/86C07C211/63C09D11/50C09K11/06
CPCC07C211/63C07C209/00C07C209/86C09K11/06C09D11/50
Inventor 袁望章汤赛星
Owner SHANGHAI JIAO TONG UNIV
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