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Quinoline unit structure-based 5/6/6 ring-fused tetradentate cyclometalated platinum (II) complex phosphorescent material and application thereof

A phosphorescent material and unit structure technology, applied in the direction of luminescent materials, compounds containing elements of Group 8/9/10/18 of the periodic table, platinum group organic compounds, etc., can solve the reduction of chemical stability and thermal stability of complexes , low phosphorescence quantum efficiency, easy distortion of bidentate ligands, etc., to achieve the effects of improving chemical stability and thermal stability, suppressing non-radiative transitions, and improving quantum efficiency

Pending Publication Date: 2022-02-11
ZHEJIANG HONGWU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Cyclic metal platinum(II) complexes based on bidentate ligands have low molecular rigidity, and the two bidentate ligands are easy to distort and vibrate, resulting in non-radiative attenuation, resulting in low phosphorescence quantum efficiency; and ring metals based on tridentate ligands. The metal platinum (II) complex molecule needs a second coordination anion (such as alkyne anion, Cl-, carbene, etc.), which will also lead to a decrease in the chemical and thermal stability of the complex; the above reasons are not conducive to its use as a phosphorescent material Application in OLED devices

Method used

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  • Quinoline unit structure-based 5/6/6 ring-fused tetradentate cyclometalated platinum (II) complex phosphorescent material and application thereof
  • Quinoline unit structure-based 5/6/6 ring-fused tetradentate cyclometalated platinum (II) complex phosphorescent material and application thereof
  • Quinoline unit structure-based 5/6/6 ring-fused tetradentate cyclometalated platinum (II) complex phosphorescent material and application thereof

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Embodiment approach or

[0040] The content of the present invention will be described in detail below. The description of the constituent elements described below may be based on representative embodiments or specific examples of the present invention, but the present invention is not limited to such embodiments or specific examples.

[0041] The compounds contained in the 5 / 6 / 6 asymmetric tetracyclic metal platinum(II) complex phosphorescent material based on the quinoline unit structure of the present invention have the structure of the following general formula (1).

[0042]

[0043]The synthetic route of the compound in the general formula (1) is as follows:

[0044]

[0045] Specific examples of the phosphorescent material of the present invention represented by the following general formula (1) are illustrated below, however, it is not to be construed as limiting the present invention.

[0046] Unless otherwise stated, all commercial reagents involved in the following experiments were pu...

Embodiment 1

[0047] Example 1: The synthesis route of tetracyclic metal platinum (II) complex phosphorescent material Pt1 is as follows:

[0048]

[0049] (1) Synthesis of intermediate 1-N: Into a 100mL three-neck flask with a magnetic rotor, add 8-hydroxyquinoline (5.00g, 34.5mmol, 1.00 equivalent), 40mL of N,N-dimethylformamide, Then it was placed in a low-temperature stirred tank, and after the temperature dropped, slowly added sodium hydride (1.38g, 34.5mmol, 1.00 equivalent) with a mass fraction of 60%, and added methyl iodide (5.14g, 36.3mmol, 1.05 equivalent), reacted overnight. The reaction mixture was quenched with ethanol, and after the solvent was distilled off under reduced pressure, it was extracted three times with ethyl acetate, the organic phases were combined, dried with anhydrous sodium sulfate, and the resulting crude product was separated and purified by silica gel column chromatography, and the eluent (petroleum ether / acetone=2:1), 4.76 g of black-red liquid was o...

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Abstract

The invention relates to the technical field of organic light-emitting materials, and provides a quinoline unit structure-based 5 / 6 / 6 parallel-ring tetradentate cyclometalated platinum (II) complex phosphorescent material with a general formula as shown in the specification. Compared with a bidentate ligand platinum (II) complex, the tetradentate ligand-based cyclometalated platinum (II) complex provided by the invention has strong molecular rigidity, can effectively inhibit non-radiative transition caused by molecular vibration, is beneficial to improvement of quantum efficiency, and has wide application prospects in various fields such as OLED display and illumination.

Description

technical field [0001] The present invention relates to a luminescent material and its application, in particular to a 5 / 6 / 6 double ring tetradentate ring metal platinum (II) complex phosphorescent material based on quinoline unit structure and its application. Background technique [0002] Compared with liquid crystal display (LCD), organic light-emitting diode (OLED) has the advantages of being very light and thin, colorful, high color saturation, no need for background light source, excellent viewing angle and response speed. It is expected that with the development and optimization of OLED materials and devices and the reduction of costs, OLED will become one of the mainstreams of display and lighting in the future. [0003] The core of the OLED field has always been the design and development of light-emitting materials. In traditional fluorescent materials, only a maximum of 25% of the singlet excitons will be utilized, and the remaining 75% of the triplet excitons wi...

Claims

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Application Information

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IPC IPC(8): C07F15/00C09K11/06H01L51/50H01L51/54H01L51/42H01L51/46
CPCC07F15/0086C09K11/06C09K2211/185C09K2211/1044C09K2211/1029H10K85/346H10K30/00H10K85/6572H10K50/11H10K2101/10Y02E10/549
Inventor 李贵杰佘远斌刘顺
Owner ZHEJIANG HONGWU TECH CO LTD
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