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Excitation-adjustable single-component organic triaryl boron room-temperature phosphorescent material

A technology of triaryl boron and room temperature phosphorescence, which is applied in the fields of luminescent materials, organic chemistry, sustainable architecture, etc., can solve the problems of exciting a single blue or green light, the performance is affected by the deployment ratio, and the excitation cannot be adjusted. Achieve the effect of less free volume, suppress non-radiative transition, and improve intersystem crossing efficiency

Pending Publication Date: 2021-10-15
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing excitation-tunable organic room-temperature phosphorescent materials are multi-component mixtures, and the performance is affected by the mixing ratio, and the performance is unstable during industrialization.
However, the existing single-component organic room-temperature phosphorescent materials can only excite a single blue or green light, and cannot achieve tunable excitation.

Method used

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  • Excitation-adjustable single-component organic triaryl boron room-temperature phosphorescent material
  • Excitation-adjustable single-component organic triaryl boron room-temperature phosphorescent material
  • Excitation-adjustable single-component organic triaryl boron room-temperature phosphorescent material

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Experimental program
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Effect test

Embodiment 1

[0045] A single-component organic triaryl boron room temperature phosphorescent material with adjustable excitation, the molecular structure of which is as follows:

[0046]

[0047] In Formula 1, Mes is 2,4,6-trimethylphenyl, and a D-A type room temperature organic phosphorescent white light material is constructed by using benzene ring as the electron donor (D) unit and BMes2 as the electron acceptor (A) unit. ;

[0048] Such as the preparation of compound 1 of formula 1, the synthetic route is as follows:

[0049]

[0050] Specifically include the following steps:

[0051] 1) Preparation of Compound R1

[0052] Under the protection of argon, weigh 1,3-dibromobenzene (4.72g, 20mmol) and dissolve it in freshly distilled tetrahydrofuran solution (60mL) and place it in a 250mL Shrek bottle, degas once, dropwise at -78°C Lithium diisopropylamide (LDA) solution (10mL, 20mmol, 2M in THF) was added dropwise, and after the reaction was continued for 1h at -78°C, I was slowl...

Embodiment 2

[0061] Room temperature phosphorescence performance test of compound 1 in embodiment 1:

[0062] figure 1 They are the PXRD of compound 1 after single crystal data fitting (A) and experimental measurement (B). Through data comparison, it can be seen that the test sample used in the experiment is a pure compound 1 sample.

[0063] figure 2 and image 3 is the ultraviolet absorption spectrum and photoluminescence spectrum of compound 1 in dichloromethane, tetrahydrofuran and toluene solutions respectively, wherein figure 2 , The absorption band around 295-300nm belongs to the n-π* transition absorption, and the absorption band around 330-340nm belongs to the π-π* transition absorption.

[0064] Figure 4 It is the photoluminescence diagram of compound 1 at different excitation wavelengths. With the increase of excitation wavelength, the peaks at 500nm and 535nm have a clear strengthening trend compared with the emission peak at 415nm; by fitting the spectral data, in In t...

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Abstract

The invention belongs to the field of organic room-temperature luminescent materials, and discloses an excitation-adjustable single-component organic triaryl boron room-temperature phosphorescent material, the molecular structure of the material takes a benzene ring as an electron donor (D) unit and BMes2 as an electron acceptor (A) unit. The phosphorescent material realizes the adjustment of emission peak intensity through the change of excitation wavelength in a crystal state, further realizes the adjustable change of material luminescence, can obtain cold white light emission under 365nm excitation, and the luminescence spectrum simultaneously covers single fluorescence and double phosphorescence emission. The material can be used as a luminescent layer material, and has a wide application prospect in organic phosphorescent display.

Description

technical field [0001] The invention belongs to the field of organic room temperature luminescent materials, in particular to a single-component organic triaryl boron room temperature phosphorescent material with adjustable excitation. Background technique [0002] Phosphor materials (phosphor materials) refer to materials that can emit phosphorescence under the excitation of electromagnetic radiation and ion rays, which can be used in display screens, fluorescent lamps, ionizing radiation detection, aircraft instrument panels, lasers and infrared night vision devices, etc., as display materials, there are Wide application prospects. [0003] As a representative of metal-free room-temperature phosphorescent (RTP) materials, organic lumoluminescent materials have unique advantages of long lifetime and low toxicity, which provide unprecedented potential for optoelectronic and biochemical materials. Tunable excitation, that is, adjusting the intensity of the emission peak by a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C09K11/06
CPCC07F5/027C09K11/06C09K2211/1007Y02B20/00
Inventor 潘效波谢扬斌赵浩
Owner LANZHOU UNIVERSITY
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