摘要
A series of benzimidazole-linked porous polymers are obtained by the condensation reaction between the o-aminobenzol end groups of building blocks(2,3,6,7,10,11-hexaaminotriphenylene,3,3'-diaminobenzidine or 1,2,4,5-benzenetetraamine)and the aldehyde groups of building blocks[terephthalicaldehyde,4,4'-biphenyl-dicarboxaldehyde,1,3,5-tris(4-acetylphenyl)benzene or 1,3,5-tris(4-formylbiphenyl)amine]in one-pot synthesis without employing any catalyst or template.The existence of the imidazole ring in the obtained polymers could be identified by Fourier transform infrared and solid-state^(13)C CP/MAS NMR spectroscopy.The sphere-shaped mor-phology of the obtained polymers is observed through scanning electron microscopy.The polymers possess Brunauer-Emmett-Teller specific surface area values over 600 m^(2)·g^(-1),showing hydrogen storage(up to 1.6 wt%,at 77 K and 1×10^(5)Pa)and carbon dioxide capture(up to 12.6 wt%,at 273 K and 1×10^(5)Pa)properties.Such poly-mers would possess good performance in the applications of gas storage and separation.
基金
support of the National Science Foun-dation of China (Nos.21374024 and 61261130092)
the Ministry of Science and Technology of China (Nos.2014CB932200 and 2011CB932500)is acknowledged.
