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Polyacid-based metal-organic framework materials and their synthesis methods and applications in photocatalytic oxidation of benzylamine coupling

A technology of organic framework and synthesis method, which is applied in the field of preparation of polyacid-based metal-organic framework chemical materials, can solve the problems of expensive catalyst, low yield, poor stability, etc., achieve optimal reaction time, good performance, and stable three-dimensional structure Effect

Active Publication Date: 2021-06-29
HENAN UNIVERSITY
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Problems solved by technology

However, these catalysts are generally limited in application due to many factors such as high price, poor stability, low yield, and the need for high temperature.

Method used

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  • Polyacid-based metal-organic framework materials and their synthesis methods and applications in photocatalytic oxidation of benzylamine coupling
  • Polyacid-based metal-organic framework materials and their synthesis methods and applications in photocatalytic oxidation of benzylamine coupling
  • Polyacid-based metal-organic framework materials and their synthesis methods and applications in photocatalytic oxidation of benzylamine coupling

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Embodiment 1

[0037] A polyacid-based metal organic framework material (SiW-Cu-DPNDI), the chemical formula of the organic framework material is: {Cu 4 (C 26 h 16 N 4 o 4 ) 4 (CH 3 EN) 2 [SiW 12 o 40 ]}•4H 2 O.

[0038] The synthetic method of above-mentioned polyacid-based metal-organic framework material, it is made of DPNDI, copper acetate monohydrate and Na 10 [ α -SiW 9 o 34 ]·18H 2 O is obtained by reacting under hydrothermal conditions, specifically comprising the following steps:

[0039] 1) Preparation of vacant Keggin-type polyacid Na 10 [α-SiW 9 o 34 ]·18H 2 O, prepared according to literature method (Gilbert Hervé, André Tézé, Study of α- and β-Enneatungstosilicates and -germanates, Inorg. Chem. 1977, 168, 2115-2117);

[0040] 2) Prepare the reaction raw material DPNDI, and refer to the literature method for synthesis (Guo-Bi Li, Jun-Min Liu, Zhi-Quan Yu, Wei Wang, Cheng-Yong Su, Assembly of a 1D coordination polymerthrough in situ formation of a new ligand by...

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Abstract

The invention discloses an example of polyacid-based metal organic framework material, the chemical formula of the organic framework material is: {Cu 4 (C 26 h 16 N 4 o 4 ) 4 (CH 3 EN) 2 [SiW 12 o 40 ]}•4H 2 O; and provides its application in the coupling of photocatalytic oxidation of benzylamine, specifically: using molecular oxygen as an oxidant, under mild light conditions, it efficiently catalyzes the coupling of oxidation of benzylamine to generate the product N-benzylidene aniline The yield is very high, showing high activity. Moreover, due to the high stability, this organic framework material was recovered and reused at least 4 times without significant change in yield.

Description

technical field [0001] The invention belongs to the technical field of preparation of polyacid-based metal-organic framework chemical materials, and specifically relates to a new polyacid-based metal-organic framework material, a synthesis method and its application in photocatalytic oxidation of benzylamine coupling. Background technique [0002] As important intermediates in the synthesis of pharmaceuticals, dyes and agricultural chemicals, imines and their derivatives have received extensive attention in recent years. In this context, several catalysts such as 2-iodobenzoic acid, ruthenium-based and gold-based catalysts have been investigated for benzylamine coupling reactions. However, these catalysts are generally limited in application due to many factors such as high price, poor stability, low yield, and high temperature requirement. The photocatalytic oxidative coupling of benzylamines to imines at low temperature and atmospheric pressure provides a mild route. Thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J31/22C07C249/02C07C251/24
CPCB01J31/1691B01J2231/70B01J2531/16C07C249/02C08G83/008C07C251/24
Inventor 李明雪韩秋霞李杰方颜司晨
Owner HENAN UNIVERSITY
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