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Synthetic method and application of covalent organic framework (COF) material

A technology of covalent organic framework and synthesis method, which is applied in the field of synthesis of covalent organic framework materials, and can solve problems such as COF materials that have not been seen yet

Active Publication Date: 2014-04-30
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some groups have begun to pay attention to the photoelectric properties of COF materials, but so far, there has been no report on the use of COF materials for photocatalysis

Method used

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  • Synthetic method and application of covalent organic framework (COF) material
  • Synthetic method and application of covalent organic framework (COF) material
  • Synthetic method and application of covalent organic framework (COF) material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The starting materials trimesaldehyde (20 mg, 0.123 mmol) and 2,5-bis(N,N-dimethyl)amino-1,4-benzenedihydrazide (52 mg, 0.186 mmol, compound 2) were added to In a pressure-resistant tube (volume: 20 mL, tube height 18 cm, tube length 9 cm), add 0.5 mL of ethanol and 1.5 mL of mesitylene, shake well, add 0.4 mL of 3 mol / L acetic acid, and dissolve the system with liquid Vacuumize after freezing with nitrogen, seal the pipe diameter with fire, put it in an oven, and react at 120°C for 3 days. After the reaction, the diameter of the tube was knocked out, acetone was added, the volume was replaced with acetone, and the tube was allowed to stand for 12 h, centrifuged and dried naturally. 50 mg of COF-LZU5 was obtained with a yield of 70%.

Embodiment 2

[0048] Add the raw materials trimesaldehyde (50 mg, 0.308 mmol) and 2,5-bis(N,N-dimethyl)amino-1,4-benzenedihydrazide (130 mg, 0.465 mmol) into the pressure tube medium (volume: 20 mL, tube height 18 cm, tube length 9 cm), add 1.25 mL of dioxane, 3.75 mL of mesitylene, shake well, add 1.0 mL of 3 mol / L acetic acid, and drain the system Vacuumize after freezing with nitrogen, seal the pipe diameter with fire, put it in an oven, and react at 120°C for 3 days. After the reaction, the diameter of the tube was knocked out, acetone was added, the volume was replaced with acetone, and the tube was allowed to stand for 12 h, centrifuged and dried naturally. 130 mg of COF-LZU5 was obtained with a yield of 72%.

Embodiment 3

[0050] Add the starting materials trimesaldehyde (50 mg, 0.308 mmol) and 2,5-bis(N,N-dimethyl)amino-1,4-benzenedihydrazide (130 mg, 0.465 mmol) to a 25 mL round In the bottom flask, add 1.25 mL solvent dioxane and 3.75 mL mesitylene, shake well, add 1.0 mL 3 mol / L acetic acid, stir and reflux for 3 days. After the reaction, acetone was added, washed three times with acetone, centrifuged and dried naturally to obtain COF-LZU5.

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Abstract

The invention discloses a synthetic method of a covalent organic framework (COF) material. The method comprises the following steps: after mixing 1,3,5-benzenetricarboxaldehyde with 2,5-di(N,N-dimethyl)amino-1,4-benzdihydrazide uniformly in an organic solvent, reacting in the presence of a catalyst acetic acid to obtain the COF material, wherein the mole ratio of 1,3,5-benzenetricarboxaldehyde to 2,5-di(N,N-dimethyl)amino-1,4-benzdihydrazide is 1:(0.5-3). The COF material obtained by adopting the method has relatively large specific surface area and regular open framework structure with adjustable diameter, thus being beneficial for mass transfer of reactants and products in photoabsorption and catalytic processes; the material can serve as a photocatalyst and can increase the yield of the dehydrogenative coupling reaction between 2-phenyl-1,2,3,4-tetrahydroisoquinoline and nitromethane from 39% in the absence of catalysts to 89%.

Description

technical field [0001] The invention belongs to the field of organic functional materials, and specifically relates to a synthesis method of a covalent organic framework material and an application of the covalent organic framework material. Background technique [0002] In recent years, photocatalytic technology has aroused extensive research interests of many chemists. At present, most of the materials used for photocatalysis are inorganic (Ti, Ga, Si, W, etc.) semiconductor materials, but these inorganic semiconductor materials generally have the disadvantage of low light utilization efficiency because of their large bandgap bandwidth. Moreover, the absorption of most inorganic semiconductor materials is in the ultraviolet region or near ultraviolet region, so that the utilization of sunlight is insufficient. Recently, pure organic framework carbon nitride (C 3 N 4 ) Semiconductors are also used for photocatalysis, but carbon nitride materials have disadvantages such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C243/38C07C241/04C08G12/08B01J31/02B01J31/06C07D217/14
Inventor 王为王怀震
Owner LANZHOU UNIVERSITY
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