Aggregation-induced emission molecule as well as preparation method and use thereof

Abstract

The invention discloses an aggregation-induced emission molecule as well as a preparation method and use thereof. The aggregation-induced emission molecule has a structural formula (shown in the description), wherein when Ar1 and Ar2 are same groups, Ar2 is a group shown in the description; and when Ar2 is hydrogen, Ar1 is a group shown in the description. The preparation method comprises the steps of: starting from a group shown in the description, wherein X=br, and Y=H or X=H, and Y=Br and tetraphenyl ethylene boric acid ester, obtaining derivatives of fluorene containing toluene and triphenylamine units by utilizing an acid-induced intramolecular dehydration reaction, linking tetraphenyl ethylene to a ninth site of the fluorine in a conjugated manner by utilizing a Suzuki reaction, and finally obtaining a target compound. According to the compound disclosed by the invention, the heat stability and the aggregation-induced emission property are good, the solid fluorescence quanta of the compound are high in yield and are emitted by blue lights, and the compound can be applied to a luminescent layer material of a blue-light inorganic light emitting diode; and the reaction conditions of the preparation method are mild, and the yield is high.

Description

technical field [0001] The invention relates to an aggregation-induced luminescent molecule, a preparation method thereof and an application in a blue-light organic light-emitting diode light-emitting layer material. Background technique [0002] Since Dr. Deng Qingyun of Kodak Company invented the organic light-emitting diode with multilayer structure for the first time in the 1980s, the research work of high-efficiency organic electroluminescent materials has entered a new era. In order to realize full-color display and solid-state lighting, red, green and blue light materials with high efficiency, stability and high color purity are indispensable. After more than 20 years of development, red and green light-emitting materials have been able to meet the needs of commercialization, but blue-light materials with excellent performance are still scarce, because the large energy gap of blue-light-emitting materials has a large energy gap for carriers to go to the light-emitting...

AI Technical Summary

Problems solved by technology

In addition, luminescent materials exist in electroluminescent devices in the form of thin films, and most fluorescent materials have the problem of "aggregation-induced fluorescence quenching" (ACQ) due to intramolecular π-π interactions.

Although scientists have used various physical or chemical methods to reduce or prevent the aggregation of fluorescent molecules, such as using host-guest doping systems and blending with transparent polymers to disperse luminescent molecules, or modifying the structure of luminescent molecules. A bulky spacer group, etc., but these methods usually bring high cost device fabrication and complicated synthesis process

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