采用二氯马来酰亚胺与芳香胺的亲核取代聚合反应合成有机多孔聚合物.

李甜禄; 张勇; 李保君; 赵鹏; 胡爱国

Porous organic polymer(POP)has attracted great interests due to its excellent pore tunability and diverse synthetic methods,and has been widely used in the fields of gas storage,carbon capture,separation,catalysis,sensing,energy storage and conversion.However,most of the POPs are prepared from expensive monomers and noble metal catalysts which usually require complicated workup thus rise the cost and reduce the synthetic efficiency.It is necessary to explore some novel precious-metal-free and workup-easy polymerization reactions to obtain POP efficiently.In this work,the monomer 1,2-bis(3,4-dichloromaleimidyl)-hexane was firstly synthesized from the reaction of 1,2-diaminocyclohexane and dichloromaleic anhydride. The POP was further synthesized through nucleophilic substitution polymerization between 1,2-bis(3,4-dichloromaleimidyl)-hexane and 1,3,5-tris-(4-aminophenyl)with acetic acid as solvent.Fourier Transform Infrared spectroscopy(FT-IR)indicates the formation of C—N bonds between dichloromale imide and aromatic amine units.Nitrogen adsorption-desorption isotherm shows that the prepared POP has a high surface area(404 m2/g)and a wide range of pore size distribution from 1 nm to 6 nm(containing micropore and mesopore).In addition,Scanning Electron Microscopy(SEM)shows that the prepared POP has a regular rod structure(diameter,1—5μm). The thermogravimetric analysis(TG)reveales that the POP has excellent thermal stability(degration temperature is up to 400°C).As a novel catalyst-free and workup-easy C—N coupling reaction,the developed nucleophilic substitution polymerization between dichloromale imide and aromatic amine works well to synthesize maleic amide-based POP efficiently,and it is an eco-friendly C—N crossing strategy which can provide people another choice to obtain the targeted POP free of catalysts efficiently.

PORE size distribution; POROUS polymers; GAS fields; METAL catalysts; PRECIOUS metals; AROMATIC amines; HEXANE; SUBSTITUTION reactions

Journal of Functional Polymers, 2019, Vol 32, Issue 2, p178

1008-9357

Academic Journal

10.14133/j.cnki.1008-9357.20180322001