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Fluorine-functionalized covalent organic framework material as well as preparation and thermoelectric application thereof

A technology of covalent organic framework and fluorene function, applied in the field of material chemistry, to achieve uniform pore size distribution, high Seebeck coefficient, and good thermoelectric performance

Active Publication Date: 2018-04-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing COFs materials have not yet involved in the research of thermoelectric field

Method used

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  • Fluorine-functionalized covalent organic framework material as well as preparation and thermoelectric application thereof
  • Fluorine-functionalized covalent organic framework material as well as preparation and thermoelectric application thereof
  • Fluorine-functionalized covalent organic framework material as well as preparation and thermoelectric application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1. Synthesis of FL-COF-1 material

[0020] Add 2,7-diaminofluorene (DAFL, 31mg) and benzene-1,3,5-tricarbaldedyde (TFB, 17.1mg) into the ampoule, then add o-dichlorobenzene (1.35mL) and n-butanol (0.15mL) and The 3M acetic acid solution (0.25mL) was sonicated for 10min to make it uniformly mixed, and then frozen in liquid nitrogen-vacuumed-thawed again, and the above operation was repeated three times. The flame was sealed under vacuum, and the reaction was kept at 120°C for 72 hours. After the reaction, the product was collected and washed with tetrahydrofuran and acetone for 3 times, and heated at 120°C under vacuum for 12 hours. The final yellow powder was the product FL-COF-1, the yield was 78%, and the BET specific surface area was 980m 2 g -1 , The pore volume is 0.54m 3 g -1 . Information analysis result obtained by infrared spectrogram: at 1624cm -1 The characteristic absorption peak of imine bond (C=N) appears.

Embodiment 2-4

[0021] Example 2-4 Synthesis of FL-COF-1 material

[0022] The method is as described in Example 1, and the difference lies in the following table:

[0023]

Embodiment 5I2

[0024] Example 5.I 2 @FL-COF-1 material synthesis

[0025] Weigh 60 mg of the sample obtained in Example 3 and place it in a small glass bottle (5 mL), and then lay it flat in a brown bottle (60 mL) containing 400 mg of iodine. Seal the brown bottle and place it in a 75°C oven to fully iodine. Doping for 24 hours. After cooling to room temperature, drying at 75°C under vacuum (0.1-1Mpa) for 6 hours to obtain the final product I 2 @FL-COF-1.

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Abstract

The invention discloses preparation of a fluorine-functionalized covalent organic framework material and an application technology of the material in the thermoelectric field. Organic micromolecular elements are polymerized orderly through a Schiff-base condensation reaction with a solvent synthesis method to form a covalent bond connected crystal structure material. The covalent organic frameworkpolymer is synthesized for the first time, and the material has the advantages that the material has permanent open pore structure and very good thermal stability, tolerates iodine doping, shows ultrahigh seebeck coefficients and good thermoelectric performance at the room temperature for the first time and the like.

Description

Technical field [0001] The invention belongs to the technical field of material chemistry, and specifically relates to a novel covalent organic framework material functionalized with fluorene, a preparation method thereof, and an application in the thermoelectric field. Background technique [0002] Covalent organic frameworks (COFs) are a special porous crystalline material that can polymerize small organic molecules through framework chemical rules to obtain a pre-designed structural framework. This crystalline material is composed entirely of light elements and is composed of covalent bonds. It has low skeleton density, high specific surface area, uniform pore size distribution, and good chemical and thermal stability. Therefore, this crystalline COFs material is widely used in many fields such as gas storage and separation, heterogeneous catalysis, and optoelectronic devices. [0003] Two-dimensional COFs materials generally tend to be arranged in a positively stacked structur...

Claims

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Application Information

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IPC IPC(8): C08G73/02
CPCC08G73/026
Inventor 高艳安董彬王良迎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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