Amphiphilic carbon dot with room-temperature phosphorescent property and synthesizing method and application thereof

Abstract

The invention belongs to the technical field of luminescent materials, and particularly relates to an amphiphilic carbon dot with a room-temperature phosphorescent property and a synthesizing method and application thereof. The synthesizing method comprises the following steps that 1, oil-soluble carbon dots are ultrasonically dispersed into deionized water to obtain a mixed solution; 2, the mixed solution obtained in the step 1 is put into a hydrothermal reaction kettle, reacting under heating is conducted for 1 hour to 6 hours at the temperature of 150 DEG C to 300 DEG C, and an initial solution is obtained; 3, the initial solution obtained in the step 2 is centrifuged, black precipitates are removed, light yellow supernatant liquid is taken to be filtered by a 0.22-micrometer filter head, and a pure amphiphilic carbon dot aqueous solution is obtained; 4, the amphiphilic carbon dot aqueous solution obtained in the step 3 is freeze-dried, and then amphiphilic carbon dot powder with the room-temperature phosphorescent property is obtained. The surface of the amphiphilic carbon dot contains hydrophilic groups and lipophilic groups; the method is easy and convenient to operate and low in cost, and the amphiphilic carbon dot can be obtained through a one-step hydrothermal method.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to an amphiphilic carbon dot with room-temperature phosphorescent properties and a synthesis method and application thereof. Background technique [0002] The element carbon is the basis of all known life on Earth. Due to its diverse electron orbital characteristics (sp 1 ,sp 2 ,sp 3 ), thus forming many substances with peculiar structures and properties. With the advantages of good photostability, low biological toxicity, easy preparation and functionalization, carbon dots have great application prospects in the fields of chemical sensing, cell imaging, photocatalysis and light-emitting diodes. In order to prepare carbon dots with excellent optical properties, convenient and economical preparation methods, researchers from all over the world have established a variety of new methods for preparing carbon dots through unremitting efforts. The methods ma...

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Problems solved by technology

[0003] However, the disadvantage is that the surface of carbon dots prepared in the prior art only contains hydrophilic or lipophilic groups, and can only be dissolved in a single solvent, which greatly limits the application of carbon dots in real life.

Although the preparation of amphiphilic carbon dots has been reported in patents, the preparation method is cumbersome and requires surface passivation agents, strong acids or strong alkalis, etc., which increases the preparation cost of carbon dots; and the prepared amphiphilic carbon dots have Low quantum yield, easy self-assembly in water or organic solvents, poor dispersion and other defects

In addition, although the fluorescent properties of carbon dots have been extensively studied and developed, there are few reports on the phosphorescent properties, and the phosphorescent properties of amphiphilic carbon dots have not been reported yet.

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