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A method for preparing a solid-state thin-film optical limiter from a covalently modified graphene composite material with aggregation-induced luminescent properties

A technology of aggregation-induced luminescence and covalent modification, which is applied in the direction of luminescent materials, chemical instruments and methods, instruments, etc., can solve the problems of limited practical application of graphene materials, poor solubility and processability, and easy accumulation of RGO sheets cluster aggregates etc.

Active Publication Date: 2021-11-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite its excellent properties and (application) prospects, due to the presence of van der Waals forces and strong π-π stacking interactions, RGO sheets are prone to stacking and cluster formation
This leads to its poor solubility and processability, which greatly limits the practical application of graphene materials.

Method used

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  • A method for preparing a solid-state thin-film optical limiter from a covalently modified graphene composite material with aggregation-induced luminescent properties
  • A method for preparing a solid-state thin-film optical limiter from a covalently modified graphene composite material with aggregation-induced luminescent properties
  • A method for preparing a solid-state thin-film optical limiter from a covalently modified graphene composite material with aggregation-induced luminescent properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: A specific synthesis method of a polymer with aggregation-induced luminescence properties and a covalently modified graphene material with aggregation-induced luminescence properties:

[0062] 1) Synthesis of Compound 1: Tetrabutylammonium bromide (900 mg, 2.79 mmol) and aqueous sodium hydroxide solution (250 ml, 50% wt) were added to a 500 mL round bottom flask. After heating the mixture to 75° C., 1,6-dibromohexane (67.8 g, 277.9 mmol) and 2,7-dibromofluorene (9.72 g, 30 mmol) were added to the mixture, respectively. After stirring at 75°C for 2 hours, the mixture was cooled to room temperature and extracted with dichloromethane, and the organic layers were combined. Wash three times with deionized water and hydrochloric acid solution (0.1M). Then dry over anhydrous MgSO4. After filtration and solvent evaporation, excess 1,6-dibromohexane was distilled off under reduced pressure using a vacuum pump. Then the crude product was filtered and purified by sil...

Embodiment 2

[0068] Example 2: A specific synthesis method for preparing a solid-state thin-film optical limiter by using a polymer covalently modified graphene composite material with aggregation-induced luminescent properties:

[0069] Step 1)-6) is the same as above;

[0070] 7) Take 10g of PMMA powder and 100ml of NMP into a narrow-mouth bottle, and dissolve the PMMA powder completely by ultrasonication. During the ultrasonication process, use a glass rod to stir once every half an hour to prevent PMMA from settling and forming a jelly until the PMMA solution is clear and transparent. Record the PMMA solution as solution A. Such as Image 6 shown.

[0071] 8) Dissolve 10mg of the composite material PFTPE-RGO into 10ml of NMP, and the solution of the sample is designated as solution B. Take 5ml of solution A and add it to the vial below, then take 1ml of solution B and add it to the vial. Sonicate the vial for about half an hour to mix the solution evenly and remove air bubbles in t...

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Abstract

The invention belongs to the technical field of organic light-emitting materials, covalently modified graphene and its composite materials used to prepare solid-state thin-film optical limiters, and specifically provides a graphene composite material covalently modified by polymers with aggregation-induced light-emitting characteristics A method for preparing a solid-state thin-film optical limiter, and a polymer with aggregation-induced luminescent properties and its covalently modified graphene and a preparation method are provided. In the present invention, polymers with aggregation-induced luminescence properties prepared by Suzuki coupling polymerization, containing tetraphenylethylene and fluorene functional groups, are covalently modified on the surface of graphene by nitroene reaction, and the obtained graphene is composited The material is used to prepare a solid-state thin-film optical limiter. The obtained graphene composite has excellent solubility, outstanding optical properties and charge transport properties, and the prepared solid-state thin-film optical limiter has excellent optical response, which endows it with a wide range of application prospects in optoelectronic devices .

Description

technical field [0001] The invention belongs to the technical field of organic luminescent materials, covalently modified graphene and its composite materials used to prepare solid-state thin-film optical limiters, and specifically provides a polymer with aggregation-induced luminescence characteristics, covalently modified graphene and a preparation method thereof , while providing a solid-state thin-film optical limiter based on a polymer covalently modified graphene composite with aggregation-induced luminescent properties and a preparation method thereof. Background technique [0002] Macromolecules with aggregation-induced emission (AIE) characteristics are a class of organic light-emitting materials. Compared with traditional organic light-emitting materials, AIE is a new design concept and theory of optical materials. and other characteristics, and has good solubility, processability, high luminous efficiency in the aggregated state, etc., as well as its huge potentia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/10C08G83/00C09K11/06C08L33/12C08L87/00C08J5/18G02F1/361
CPCC08G61/10C08G83/001C08G2261/124C08G2261/143C08G2261/312C08G2261/3142C08G2261/411C08G2261/52C08J5/18C08J2333/12C08J2487/00C09K11/06C09K2211/1416C09K2211/1425G02F1/3615
Inventor 张斌陈柯宇陈泳楠范越丹邢可迪刘志伟王可心陈彧
Owner EAST CHINA UNIV OF SCI & TECH
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