A kind of humidity-sensitive covalent organic framework and preparation method thereof

A covalent organic framework and humidity-sensitive technology, applied in the field of covalent organic framework, achieves the effects of being intuitively visible to the naked eye, increasing porosity and specific surface area, and facilitating detection

Active Publication Date: 2022-07-19
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a humidity-sensitive covalent organic framework and its preparation method to solve the problem of the above-mentioned covalent organic framework detecting water molecules in extreme environments with low humidity

Method used

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  • A kind of humidity-sensitive covalent organic framework and preparation method thereof
  • A kind of humidity-sensitive covalent organic framework and preparation method thereof
  • A kind of humidity-sensitive covalent organic framework and preparation method thereof

Examples

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Embodiment 1

[0022] Weigh 1,3,6,8-tetrakis(4-carboxyphenyl)pyrene (46.4 mg, 0.075 mmol) and 2,5-diaminobenzoic acid (22.8 mg, 0.15 mmol) into a 10 mL ampoule, add to Add 1 mL of mixed solvent to the ampoule bottle, the mixed solvent is 1,2-dichlorobenzene and 1-butanol with a volume ratio of 1:1, then add 0.1 mL of 6mol / L acetic acid solution, and perform liquid nitrogen freezing-dehydration on the reaction system. After three cycles of gas-melting, the ampoules were flame-sealed and reacted at 120° C. for 3 days. The final product was an orange-red covalent organic framework powder with a yield of 88%.

[0023] The present embodiment obtains a crystallized covalent organic framework through a solvothermal reaction, figure 1 It is the X-ray powder diffraction pattern of the covalent organic framework made in Example 1. It can be seen from the figure that there is a diffraction peak of the (110) crystal plane at 3.88 degrees, indicating that the covalent organic framework synthesized by the...

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Abstract

The invention discloses a humidity-sensitive covalent organic framework and a preparation method thereof. The preparation method includes weighing 1, 3, 6, 8-tetrakis(4-formaldehyde phenyl) pyrene and 2,5-diamino The benzoic acid is placed in an ampoule, a solvent and a catalyst are added, the reaction system is then subjected to three cycles of liquid nitrogen freezing-degassing-melting, and the ampoule is flame-sealed, and the reaction is carried out at 100-150 ° C for 1-5 days to obtain Covalent organic framework powder. The present invention adopts a humidity-sensitive covalent organic framework with the above structure and a preparation method thereof, the preparation method is simple, the prepared covalent organic framework can detect the presence or absence of water molecules by using its color change, the detection time is short, and the detection result is short. Intuitively.

Description

technical field [0001] The invention relates to the technical field of covalent organic frameworks, in particular to a humidity-sensitive covalent organic framework and a preparation method thereof. Background technique [0002] A covalent organic framework is a crystalline network polymer constructed from pure organic structural units in the form of covalent bonds under the principle of topological chemistry. It has the advantages of high specific surface area, low density, and excellent stability. Polymer materials have the characteristics of highly precise molecular design in structure, and their pores are open and orderly and have excellent porosity. The related materials that can sensitively detect and quickly respond to humidity are relatively rare. The present invention aims to provide a color-changing responsive covalent organic framework that is very sensitive to humidity. In a relatively dry atmospheric environment (relative humidity (less than 15%) can quickly an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/08
CPCC08G12/08
Inventor 李娟刘丽丽王晶
Owner SHANXI UNIV
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