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Preparation and application of an organic white light emitting material l-cooh

A technology of emissive materials and luminescent materials, applied in luminescent materials, organic chemistry, the use of gas discharge lamps, etc.

Inactive Publication Date: 2014-10-15
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the long-wave fluorescence emission produced in this way is often greatly affected by stacking, and the change of the stacking distance between molecules can cause the shift or even quenching of the long-wave emission wavelength, which is difficult to control in actual synthesis.

Method used

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  • Preparation and application of an organic white light emitting material l-cooh

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Experimental program
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Embodiment Construction

[0012] , Preparation of compounds

[0013] Dissolve 0.16 g of 4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine molecule and 0.264 g of p-chloromethylbenzoic acid in 20 mL of acetonitrile and add to the round bottom flask Heating to reflux in medium temperature for about 24 h, when the reaction liquid was cooled, a white precipitate was formed, and the white powder product L-COOH·Cl was obtained after filtration and drying.

[0014] Weigh 30 mg L-COOH·Cl sample and 80 mg LiClO 4 Added to 3 mL sodium phosphate buffer solution (NaH 2 PO 4 : NaH 2 PO 4 =1:1), after stirring, the mixed solution was added to a stainless steel reactor containing a polytetrafluoroethylene liner, heated to 110 oC for 3 days, and then cooled to room temperature within 3 days to obtain a light yellow prismatic crystal L- COOH·ClO 4 .

[0015] 2. Performance test

[0016] Our L-COOH·ClO 4 The crystal and PVP film were tested for fluorescence spectrum. Under the excitation wavelength of 365 nm, the chroma...

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Abstract

The invention belongs to the technical field of light emission and display, and relates to the preparation and application of an organic white light emitting material L-COOH. The chemical formula of the material is [C28H21N4O2]ClO4, and its main body is 4'-(N-(4-carboxy-benzylidene)-4-pyridyl)-2,2':6',2''-terpyridine onium, and the other part is the counter anion ClO4–. Among them, the counter anion can be replaced by Cl–, NO3–, PF6–, BF4–, etc. The molecular weight of L-COOH is 544.94. Prepared by nucleophilic substitution. Its crystal or thin film has double emission in the range of 400-750nm, and can emit white light under the excitation of 365nm ultraviolet lamp. The material improves the shortcomings of the organic multi-molecule hybrid material such as low stability, easy phase separation and high preparation process, and can be used in the preparation of white light LEDs and other light-emitting display fields.

Description

technical field [0001] The present invention relates to the preparation of organic white light emitting material 4'-(N-(4-carboxy-benzylidene)-4-pyridyl)-2,2':6',2''-terpyridinium salt L-COOH Preparation and application. Background technique [0002] The design and synthesis of organic white light-emitting materials have been the focus of research and development of OLED materials in recent years. Among them, due to the shortcomings of organic multi-molecular hybrid materials such as low stability, easy phase separation, and high preparation process, the research and development of stable organic single-molecule white fluorescent materials has attracted increasing attention. However, since white light is composite light, which is usually formed by the three primary colors of red, yellow, and blue, or the mixture of blue and yellow light, so far organic single molecules with stable white fluorescence are very rare, and almost all reports are concentrated in solution. It is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/04C09K11/06H01L51/50H01L51/54
CPCY02B20/181Y02B20/00
Inventor 张杰金旭辉
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI