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A fluorene-functionalized covalent organic framework material and its preparation and thermoelectric applications

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

Active Publication Date: 2020-03-10
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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  • A fluorene-functionalized covalent organic framework material and its preparation and thermoelectric applications
  • A fluorene-functionalized covalent organic framework material and its preparation and thermoelectric applications
  • A fluorene-functionalized covalent organic framework material and its preparation and thermoelectric applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The synthesis of embodiment 1.FL-COF-1 material

[0020] 2,7-diaminofluorene (DAFL, 31 mg) and benzene-1,3,5-tricarbaldedyde (TFB, 17.1 mg) were added to the ampoule, followed by o-dichlorobenzene (1.35 mL) and n-butanol (0.15 mL) and 3M acetic acid solution (0.25mL) was sonicated for 10min to make it evenly mixed, and then frozen in liquid nitrogen-vacuumized-thawed again, and the above operation was repeated three times. The flame was sealed under vacuum conditions, and the reaction was carried out at 120°C for 72 hours. After the reaction, the product was collected and washed three times with tetrahydrofuran and acetone respectively, and dried at 120°C under vacuum for 12 hours. Finally, a yellow powder was obtained, which was the product FL-COF-1, with a yield of 78% and a BET specific surface area of ​​980m 2 g -1 , the pore volume is 0.54m 3 g -1 . Information analysis results obtained by infrared spectroscopy: at 1624cm -1 The characteristic absorption peak ...

Embodiment 2-4

[0021] The synthesis of embodiment 2-4 FL-COF-1 material

[0022] Method as described in embodiment 1, its difference is following table:

[0023]

Embodiment 5I2

[0024] Embodiment 5.I 2 Synthesis of @FL-COF-1 materials

[0025] Weigh 60 mg of the sample obtained in Example 3 and place it in a small glass bottle (5 mL), then place it flat in a brown bottle (60 mL) containing 400 mg of iodine element, seal the brown bottle, and place it in an oven at 75 ° C to make it fully iodine. Doped for 24 hours. After cooling to room temperature, it was dried under vacuum (0.1-1Mpa) at 75°C 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 in particular relates to a novel covalent organic framework material functionalized with fluorene, a preparation method thereof, and an application in the field of thermoelectricity. Background technique [0002] Covalent organic frameworks (COFs) are a special kind of porous crystalline materials, which can be polymerized with small organic molecular units through the rules of framework chemistry to obtain predesigned structural frameworks. This crystalline material is composed entirely of light elements and linked by covalent bonds. It has low skeletal 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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