Mesoporous iridium pyridine heterogeneous catalyst, its preparation method and application

A heterogeneous catalyst, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of low chemical and thermal stability, waste of resources environment , difficult to recycle and other problems, to achieve high chemical and thermal stability, wide application, the effect of eliminating the diffusion of reaction substrates

Inactive Publication Date: 2017-12-08
SHANGHAI NORMAL UNIVERSITY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing homogeneous catalysts have disadvantages such as low chemical and thermal stability, high cost, and difficulty in recycling, resulting in waste of resources and environmental pollution.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mesoporous iridium pyridine heterogeneous catalyst, its preparation method and application
  • Mesoporous iridium pyridine heterogeneous catalyst, its preparation method and application
  • Mesoporous iridium pyridine heterogeneous catalyst, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: Preparation of mercapto-functionalized mesoporous silica foam matrix (SH-MCF):

[0060] Mix P123 (4.000g) and hydrochloric acid solution (150mL 1.6mol / L), then stir at 37°C for 2h until the solution becomes clear, then add 1,3,5-trimethylbenzene (4.6 mL), ammonium fluoride (0.0460g), then stirred at a temperature of 37°C for 1h; then added TEOS (7.34mL) dropwise to the solution, and then stirred at a temperature of 40°C for 4h; MPTMS (1.15mL) was added dropwise to the mixture, and aged for 20h under medium-speed stirring; then the mixture was poured into a polytetrafluoroethylene-lined autoclave, and then aged at a temperature of 100°C 24h; then the mixture was separated by filtration, washed with ethanol, and then dried in vacuum at 80°C for 12h to obtain a white powder; finally, the white powder was dispersed in a mixture of hydrochloric acid and ethanol (200mL, volume ratio 2:100) solution, and then refluxed at a temperature of 80° C. for 4 h; centrifuged...

Embodiment 2

[0061] Embodiment 2: the preparation of homogeneous iridium pyridine catalyst (IrL):

[0062] Diisopropylammonia (0.8mL), n-butyllithium n-hexane (3.5mL, 1.6mol / L) and anhydrous tetrahydrofuran (10mL) were mixed, then stirred at -78°C under nitrogen protection for h; Add 4,4'-dimethyl-2,2'-bipyridine (1g) and anhydrous tetrahydrofuran (45mL) to the mixed solution, then stir for 15min at -78°C; then Stir at 0°C for 1h; then add allyl bromide (0.72g) and anhydrous tetrahydrofuran (15mL) to the mixed solution, then stir for 12h at a temperature of 25°C; then add methanol ( 5mL), then vacuum dried to obtain the crude product; then the crude product was dissolved in dichloromethane, and washed with deionized water, brine, MgSO 4 The solid was dried, and finally the oily substance 4-(3-butenyl)-4'-methyl-2,2'-bipyridine was obtained by column chromatography; then 4-(3-butenyl)-4' -Methyl-2,2'-bipyr (0.0986g), chlorotetrakis[2-(2-pyridyl)phenyl]diiridium(III)(0.214g), ethylene glyc...

Embodiment 3

[0063] Embodiment 3: the preparation of mesoporous iridium pyridine catalyst (MCF-Ir):

[0064] First iridium pyridine catalyst (0.0500g), SH-MCF (0.1000g), AIBN (0.0200g) CHCl 3 (10mL) were mixed, and then refluxed in a nitrogen atmosphere for 24h; finally filtered, washed, and dried (80°C) to obtain a mesoporous iridium pyridine heterogeneous catalyst.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a mesoporous iridium pyridine heterogeneous catalyst, its preparation method and application. The mesoporous iridium pyridine heterogeneous catalyst comprises a mercapto-functionalized mesoporous foamed silica matrix and an iridium pyridine catalyst covalently bonded to the matrix, and the active sites of the iridium pyridine catalyst are dispersed in the mesoporous channels of the matrix. Further, the heterogeneous catalyst has a three-dimensional pore structure. The preparation method of the heterogeneous catalyst is mainly realized by the click chemistry method, which can be well dispersed in the reaction system, and grafted Ir3+ active sites are dispersed on the inner wall of the channel, which can contact the substrate independently of each other , can achieve catalytic effect without mutual influence, has good chemical and thermal stability, can eliminate the influence of reaction substrate diffusion, can be widely used in photoinduced electron transfer reactions, and can be reused, and its preparation process is simple, The source of raw materials is extensive, the operation is convenient and controllable, the cost is low, and it is easy to implement on a large scale.

Description

technical field [0001] The invention relates to a heterogeneous catalyst and its preparation process, in particular to a mesoporous iridium pyridine heterogeneous catalyst, its preparation method and application. Background technique [0002] Light energy is a non-toxic and non-polluting renewable energy. In recent years, the use of visible light for photocatalytic organic synthesis has become a hot topic and a foreword in organic chemistry research. As a typical visible light photosensitizer, the iridium complex photocatalyst changes from the ground state to the excited state after being excited by visible light in the process of photocatalytic organic synthesis, and reacts with reducing or oxidizing reaction substrates to realize the interaction between organic substrates. The single electron transfer process (SET). At present, the catalyst has been used in various light-induced organic synthesis systems. However, the existing homogeneous catalysts have disadvantages suc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22
Inventor 张昉郝中凯毛展
Owner SHANGHAI NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap