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A kind of pyridinium salt metal cobalt porphyrin and its preparation method and application

A technology of porphyrin and pyridinium bromide, which is applied in the chemical field, can solve the problems of cumbersome synthesis of metalloporphyrins and difficult recovery of catalysts, and achieve excellent catalytic activity and selectivity, simple synthesis steps, and easy operation

Inactive Publication Date: 2020-04-07
NORTHWEST UNIV
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Problems solved by technology

However, the synthesis of quaternary ammonium salt-type metalloporphyrins reported in the literature is cumbersome, and the catalyst is difficult to recycle.

Method used

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  • A kind of pyridinium salt metal cobalt porphyrin and its preparation method and application
  • A kind of pyridinium salt metal cobalt porphyrin and its preparation method and application
  • A kind of pyridinium salt metal cobalt porphyrin and its preparation method and application

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Embodiment Construction

[0022] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0023] 1. Co(TEtPyP)Br 4 chemical structure

[0024] The metal cobalt porphyrin provided by the present invention is 5,10,15,20-tetrakis(4-(3-(4-(N-ethyl)pyridine bromide)pyrazolyl)phenyl)cobalt(II)porphyrin (Co(TEtPyP)Br 4 ), a metalloporphyrin belonging to pyridinium salts, a water-soluble cation, the structural formula is as follows:

[0025]

[0026] In the structure of the metal cobalt porphyrin, the central metal cobalt can be used as a Lewis acid, and the peripheral pyridinium salt can be used as a Lewis base to play a synergistic catalytic effect, so the catalyst has great potential in the cycloaddition reaction of carbon dioxide and epoxides. Good catalytic effect.

[0027] The central metal cobalt can activate the epoxide, and the peripheral pyridinium salt can adsorb and activate CO 2 , so that the two activated reactan...

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Abstract

The invention discloses a pyridinium salt metal cobalt porphyrin and its preparation method and its high activity catalytic CO 2 Application in cycloaddition reaction, wherein, the metal cobalt porphyrin is 5,10,15,20-tetrakis(4-(3-(4-(N-ethyl) pyridinium bromide) pyrazolyl) phenyl ) Cobalt (II) porphyrin, belonging to pyridinium salts, is a water-soluble cation. The benefits of the present invention are: the metal cobalt porphyrin provided by the present invention, in its structure, the central metal cobalt can be used as a Lewis acid, and the peripheral pyridinium salt can be used as a Lewis base to play a synergistic catalytic effect. After verification, the metal Cobalt porphyrin exhibits excellent catalytic activity and selectivity in the cycloaddition reaction of carbon dioxide and epoxides, and its catalytic TON and TOF of epichlorohydrin can reach 4320h, respectively. ‑1 and 529h ‑1 , the selectivities are all over 99%.

Description

technical field [0001] The present invention relates to a compound and its preparation method and application, in particular to a pyridinium salt metal cobalt porphyrin and its preparation method and its high activity catalytic CO 2 The application in the cycloaddition reaction belongs to the field of chemical technology. Background technique [0002] Enzymes composed of metalloporphyrins are widely found in animals and plants, such as in animal blood and plant chlorophyll, but their development is limited by their poor stability, high cost, sensitivity to the environment, and low repetition rate. Therefore, it is of great significance to study the biomimetic catalysts of metalloporphyrins, and the synthesized metalloporphyrins can be applied in biochemistry, biological enzymes, biological simulation and photocatalysis. [0003] Due to environmental and cost factors, CO 2 The immobilization of has a very good development prospect, and the lactone obtained by the cycloaddit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D487/22B01J31/22C07D317/36C07D317/42
CPCB01J31/183C07D317/36C07D317/42C07D487/22
Inventor 李珺赵东波王宁王永松宋邓萌
Owner NORTHWEST UNIV
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