Sodium crown ether Salen Schief base isobi-metal condensation complex, preparation and use thereof

A Schiff base, bimetallic technology, applied in the polymer field, can solve the problems of limited use, difficult recovery and reuse, etc.

Inactive Publication Date: 2009-02-11
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the small molecule crown ether Schiff base has the disadvantage of being difficult to recycle and reuse in catalytic oxidation, thus limiting the wide use of this catalyst.

Method used

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  • Sodium crown ether Salen Schief base isobi-metal condensation complex, preparation and use thereof
  • Sodium crown ether Salen Schief base isobi-metal condensation complex, preparation and use thereof
  • Sodium crown ether Salen Schief base isobi-metal condensation complex, preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, preparation of crown ether sodium-Salen Schiff base cobalt bimetallic polycondensation complex

[0033] ① Firstly, polycondensation reaction is carried out by 4', 5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 and di-m-dibenzocrown sulfonyl chloride to obtain solid polycondensation type Polymer (Sal-2NaCrown): fully dissolve 4',5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 in NaOH aqueous solution, under nitrogen protection, 30°C, Add the chloroform solution of bis-m-dibenzocrown sulfonyl chloride dissolved with 4', 5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 equimolar amount under high-speed stirring , kept the temperature constant, reacted for 1 hour, filtered with suction, washed with water, chloroform and DMF respectively, and dried in vacuum at 60°C for 72 hours to obtain a deep yellow flaky solid polycondensation polymer.

[0034] ② Reaction of the solid polycondensation polymer (Sal-2NaCrown) with the transition metal cobalt acetate to...

Embodiment 2

[0035] Embodiment 2, preparation of crown ether sodium-Salen Schiff base cobalt bimetallic polycondensation complex:

[0036] ① Firstly, polycondensation reaction is carried out by 4', 5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 and di-m-dibenzocrown sulfonyl chloride to obtain solid polycondensation type Polymer (Sal-2NaCrown): Fully dissolve 4',5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 in NaOH aqueous solution, under nitrogen protection at 15°C, at high speed Stir and add the chloroform solution of two-m-dibenzocrown sulfonyl chloride dissolved with 4', 5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 molar weight 2 times , kept the temperature constant, reacted for 3 hours, filtered with suction, washed with water, chloroform, and DMF respectively, and dried in vacuum at 90°C for 48 hours to obtain a dark yellow flaky solid polycondensation polymer.

[0037] ② Reaction of the solid polycondensation polymer (Sal-2NaCrown) with the transition metal cobalt acet...

Embodiment 3

[0038] Embodiment 3, preparation of crown ether sodium-Salen Schiff base cobalt bimetallic polycondensation complex:

[0039] ① Firstly, polycondensation reaction is carried out by 4', 5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 and di-m-dibenzocrown sulfonyl chloride to obtain solid polycondensation type Polymer (Sal-2NaCrown): fully dissolve 4',5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 in NaOH aqueous solution, under nitrogen protection, 0°C, Add the chloroform solution dissolved with 4',5'-bis(2-hydroxybenzylideneimino)benzo-15-crown-5 molar amount of 3 times bis-m-dibenzocrown sulfonyl chloride with high-speed stirring , kept the temperature constant, reacted for 5 hours, filtered with suction, washed with water, chloroform, and DMF respectively, and dried in vacuum at 120°C for 24 hours to obtain a dark yellow flaky solid polycondensation polymer.

[0040] ② Reaction of the solid polycondensation polymer (Sal-2NaCrown) with the transition metal cobalt aceta...

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Abstract

A sodium crown ether-Salen xifokali isobimetal condensation complex, its preparation and use are disclosed. The complex consists of double active centers (a monomer consists of a catalytic active center and two modified active centers). The complex is prepared by condensation reacting 4, 5,-bi(2-hydroxy-benzal-imino)benzo-15-corona-5 with di-meta-dibenzo crown ether sulfonic acid to obtain solid condensed polymer and reacting the solid condensed polymer with transition metal to obtain final product. It has strong catalytic performance and can be used for catalytic molecular oxidation reaction.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and relates to a macromolecular catalyst, in particular to a macromolecular catalyst for catalyzing and activating molecular oxygen—a sodium crown ether-Salen Schiff base heterobimetallic polycondensation complex. Background technique [0002] As an essential substance for life activities, molecular oxygen has the characteristics of abundant raw materials, high oxidation efficiency, and environmental friendliness compared with other oxygen donors. Therefore, molecular oxygen is currently the most ideal oxygen supply in the field of biomimetic catalytic oxidation and has the most industrial application prospects. body. Studies have shown that metalloporphyrin complexes can catalyze molecular oxygen under mild conditions, especially substituted metalloporphyrins exhibit high catalytic activity and selectivity in catalytic oxidation reactions. However, metalloporphyrins in a homogeneous syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/48C08G65/26B01J31/06C07C13/20C07C7/148
Inventor 王荣民马国平李晓东何玉凤
Owner NORTHWEST NORMAL UNIVERSITY
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