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Two-dimensional polymer brush and crystal and preparation method thereof

A technology of polymer brushes and crystals, applied in the field of two-dimensional materials, can solve problems such as damage and complex photolithography steps, and achieve the effects of ensuring completeness, high-efficiency connection, and reducing the difficulty of characterization

Active Publication Date: 2020-11-03
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For "bottom-up" patterning methods, the patterning of block copolymers can be finer and more controllable, but they are usually limited by complex photolithography steps, limited substrates and / or physical properties of substrates. destroy

Method used

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  • Two-dimensional polymer brush and crystal and preparation method thereof
  • Two-dimensional polymer brush and crystal and preparation method thereof
  • Two-dimensional polymer brush and crystal and preparation method thereof

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Experimental program
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Embodiment

[0051] A method for preparing a two-dimensional polymer brush, comprising the following steps:

[0052](1) prepare the aldehyde-based monomer (being compound 4) of following structure, specifically comprise the following steps:

[0053]

[0054] Step (1): Synthesis of compound 1:

[0055]

[0056] Add tribromotridene (200mg, 0.345mmol) and potassium tert-butoxide (571.2mg, 5.1mmol) into the two-neck flask, after nitrogen protection, add 30mL of anhydrous THF, raise the temperature to 60°C, react for 30min, and gradually add 2-(6-Bromohexyl)tetrahydropyran (914.9mg, 3.45mol), stirred overnight; after the reaction was completed, quenched the reaction by adding water, extracted 3-4 times with dichloromethane, and the organic phase was extracted by anhydrous magnesium sulfate After drying and filtering, the solvent was distilled off under reduced pressure; the obtained crude product was purified by silica gel column chromatography and recrystallized to obtain a light yellow...

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Abstract

The invention discloses a two-dimensional polymer brush, a crystal thereof and a preparation method thereof, the structure of the two-dimensional polymer brush is shown as a formula I, and the two-dimensional polymer brush is placed in dichloromethane for crystallization to form the two-dimensional polymer brush crystal with a special pattern. The preparation method comprises the following steps:in a manner of from bottom to top, introducing a crystalline polymer (mPEGN3) into a C3 symmetrical aldehyde group construction unit (compound 4) of a covalent organic framework (COFs) through a Clickreaction in the step (2) by using a high-efficiency link bond, and forming a dynamic covalent bond with a rigid structure with amino groups at two ends by using a hot solvent method in the step (3),thus preparing the two-dimensional polymer brush with the crystalline polymer periodically distributed on the surface of the two-dimensional COF material. In addition, the polymer brush can realize apattern with a special crystal structure in a nano scale in a special solvent.

Description

technical field [0001] The invention belongs to the field of two-dimensional materials, and in particular relates to a two-dimensional polymer brush, its crystal and a preparation method. Background technique [0002] At present, the main methods to achieve two-dimensional plane patterning are: 1) The "top-down" processing method is to copy or transfer the pattern through direct contact between the patterned mold or stamp and the substrate. This method is determined by external forces and can be designed. Arbitrarily form any patterned structure, but there are also disadvantages such as high processing cost and long cycle; 2) The "bottom-up" patterning method is to construct complex multi-scale structures through self-assembly, and the patterned structure is obtained by thermodynamics and kinetics Commonly determined, the most attractive feature of the "bottom-down" patterning method is that it can be directly patterned in large quantities without expensive tools. With the r...

Claims

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Application Information

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IPC IPC(8): C08G12/08C08G65/332C07C67/08C07C69/606
CPCC07C45/64C07C67/08C07D309/12C08G12/08C08G65/3326C07C2603/54C07C69/606C07C47/57
Inventor 尧晟林张维司自卫田宇锋
Owner SOUTH CHINA UNIV OF TECH
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