Preparation method for carbon-containing quantum dot white light emitting room temperature ionic liquid

Abstract

The invention discloses a preparation method for a carbon-containing quantum dot white light emitting room temperature ionic liquid. The method comprises the following steps: respectively preparing green light emitting carbon quantum dots and red light emitting carbon quantum dots by a hydrothermal method and a phosphoric acid thermal method by taking o-phenylenediamine as a precursor; dissolvingthe green light emitting carbon quantum dots and red light emitting carbon quantum dots in room temperature ionic liquid to obtain a carbon-containing quantum dot green light emitting room temperatureionic liquid and a carbon-containing quantum dot red light emitting room temperature ionic liquid; obtaining the carbon-containing quantum dot white light emitting room temperature ionic liquid withthe colour coordinates of (0.3298, 0.3284) by combining the prepared carbon-containing quantum dot blue light emitting room temperature ionic liquid and regulating the mixing ratio of the carbon-containing quantum dot green light emitting room temperature ionic liquid, the carbon-containing quantum dot red light emitting room temperature ionic liquid and the carbon-containing quantum dot blue light emitting room temperature ionic liquid. The green light emitting quantum dots and the red light emitting quantum dots prepared by the preparation method can be dissolved in a room temperature ionicliquid directly; the colour radicals of the prepared white light emitting room temperature ionic liquid completely consist of carbon quantum dots. The preparation method disclosed by the invention iseasy to operate, suitable for large-scale industrial production, and is beneficial to expand the application of the carbon quantum dots in the field of fluorescent printing ink.

Description

technical field [0001] The invention relates to a preparation method of a carbon-containing quantum dot white light emitting room temperature ionic liquid, which belongs to the field of new materials. Background technique [0002] Ionic liquids are a class of low-temperature molten salts composed of relatively large cations and anions. Among them, ionic liquids that are liquid at room temperature are called room temperature ionic liquids. Room temperature ionic liquids have good thermal stability, low volatility, and nonflammability, and are known as "green solvents" with programmable molecules and adjustable properties. In recent years, room temperature ionic liquids with photoluminescent properties have attracted extensive attention from researchers. The usual practice is to graft fluorescent chromophores onto ionic liquids, or use coordination to introduce rare earth elements into room temperature ionic liquids. It has been reported in the literature that π-conjugated g...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, especially the complicated construction method of luminescent room temperature ionic liquids and low luminous efficiency, the present invention provides a preparation method of carbon-containing quantum dot white light emitting room temperature ionic liquids. Carbon quantum dots emit green li...

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