Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Photoresponse type polyoxometalate catalyst and application thereof in homogeneous catalysis and heterogeneous recycling

A multi-metal oxygen cluster, homogeneous catalysis technology, applied in chemical recovery, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc. problem, to achieve the effect of simple operation and a wide range of solvents

Inactive Publication Date: 2013-09-25
JILIN UNIV
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have their advantages, but they all have their own limitations, for example: the recovery process is cumbersome (both require filtering means), not universal, etc.

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
  • Photoresponse type polyoxometalate catalyst and application thereof in homogeneous catalysis and heterogeneous recycling
  • Photoresponse type polyoxometalate catalyst and application thereof in homogeneous catalysis and heterogeneous recycling
  • Photoresponse type polyoxometalate catalyst and application thereof in homogeneous catalysis and heterogeneous recycling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Synthesis of N,N-dimethyldecyl(10-(4'-oxyazobenzene))decylammonium bromide surfactant molecule (S-1), whose structural formula is as follows:

[0053]

[0054] 5.0 g of p-hydroxyazobenzene, 15.2 g of 1,10-dibromodecane, 7.0 g of anhydrous potassium carbonate, catalyst amount of 18-crown-6 and 150 ml of acetone were mixed, stirred and refluxed for 24 hours under nitrogen protection. After the reaction, the reaction solution was naturally cooled to room temperature, and the insoluble solid salt was removed by filtration, and the filtrate was evaporated to dryness under reduced pressure. The resulting liquid crude product was purified by column chromatography using a mixed solvent of petroleum ether / chloroform with a volume ratio of 2:1 as an eluent to obtain 7.6 grams of a yellow solid product, which is 1-bromo-10-(4'-oxyl Azobenzene) decane, the productive rate is 72.4%.

[0055] 2.7 grams of dimethyldecylamine and 5 grams of 1-bromo-10-(4'-oxyazobenzene) decane were...

Embodiment 2

[0057] Synthesis of N,N-dimethylbis(8-(4'-oxyazobenzene))octylammonium bromide surfactant molecule (S-2), whose structural formula is as follows:

[0058]

[0059] Mix 2.0 g of p-hydroxyazobenzene, 5.5 g of 1,8-dibromooctane, 2.8 g of anhydrous potassium carbonate, catalytic amount of 18-crown-6 and 150 ml of acetone, and stir and reflux for 24 hours under nitrogen protection. After the reaction, the reaction solution was naturally cooled to room temperature, and the insoluble solid salt was removed by filtration, and the filtrate was evaporated to dryness under reduced pressure. The resulting liquid crude product was purified by column chromatography using a mixed solvent of petroleum ether / chloroform with a volume ratio of 2:1 as the eluent to obtain 2.3 grams of a yellow solid product, which was 1-bromo-8-(4'-oxyl Azobenzene) octane, the productive rate is 58.2%.

[0060] 2.5 grams of 33% dimethylamine aqueous solution and 1.0 grams of 1-bromo-8-(4'-oxyazobenzene) octan...

Embodiment 3

[0063] Synthesis of N,N-dimethylbis(6-(4'-oxyazobenzene))hexylammonium bromide surfactant molecule (S-3), whose structural formula is as follows:

[0064]

[0065] Mix 5.0 g of p-hydroxyazobenzene, 12.3 g of 1,6-dibromohexane, 7.0 g of anhydrous potassium carbonate, catalytic amount of 18-crown-6 and 150 ml of acetone, and stir and reflux for 24 hours under nitrogen protection. After the reaction, the reaction solution was naturally cooled to room temperature, and the insoluble solid salt was removed by filtration, and the filtrate was evaporated to dryness under reduced pressure. The resulting liquid crude product was purified by column chromatography using a mixed solvent of petroleum ether / chloroform with a volume ratio of 2:1 as the eluent to obtain 5.5 grams of a yellow solid product, which was 1-bromo-6-(4'-oxyl Azobenzene) hexane, the productive rate is 59.3%.

[0066] 5.3 grams of 33% dimethylamine aqueous solution and 2.0 grams of 1-bromo-6-(4'-oxyazobenzene) hexa...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a photoresponse type polyoxometalate catalyst and an application thereof in homogeneous catalysis and heterogeneous recycling and belongs to the technical field of oxidant recycling and reusing. The invention further discloses a method for recycling and reusing a homogeneous catalyst of a polyoxometalate compound by adjusting and controlling the polarity or solubility of the polyoxometalate compound by using the polarity change accompanying with photoinduced azobenzene cis-trans isomerization. The method is simple and feasible, free of introduction of other chemical additives and beneficial to industrial production. The method comprises the following steps of: synthesizing cationic surfactant molecules containing azobenzene groups at the tail ends, preparing the polyoxometalate compound containing azobenzene groups at the periphery and the like. In the process of recycling and reusing the polyoxometalate compound catalyst, the polarity change accompanying with the photoinduced isomerization of the azobenzene groups in the compound further causes the changes of compound polarity and solubility and plays a critical role in the recycling process of the polyoxometalate compound catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalyst recovery and reuse, and in particular relates to a photoresponsive polymetallic oxygen cluster homogeneous catalyst and its application in homogeneous catalysis and heterogeneous catalysis recovery and reuse. Background technique [0002] Polyoxometallic clusters are a class of nanoscale inorganic monomolecular clusters with a definite structure and a size between 0.5 and 6 nanometers. The physical and chemical properties and chemical composition of polyoxometalates are rich, the topological structures are diverse, and the functions are extensive, so they have great application potential in the fields of optical, electrical, and magnetic functional materials, medicine, and catalysis (Special issue on polyoxometalates, Chem.Rev.1998 ,98,1). Among the various functional properties of polymetallic oxygen clusters, the catalytic properties are the most widely and deeply studied, among which polymeta...

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
IPC IPC(8): B01J31/34B01J31/40C07B45/00C07C315/02C07C317/14C07D279/34
CPCY02P20/584
Inventor 吴立新杨扬
Owner JILIN UNIV
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com