摘要： Three novel phosphine oxide-based conjugated microporous polymers TEPO-1, TEPO-2 and TEPO-3 are designed and synthesized, which are constructed using the phosphine-based building unit tris(4-ethynylphenyl)phosphine oxide with linkers tris(4-ethynylphenyl)phosphine oxide, triphenylphosphine oxide and tri(thiophen-2-yl)phosphine oxide via Sonogashira-Hagihara homo-coupling or cross-coupling condensation reaction. The adsorption isotherms of N 2 reveal that the Brunauer-Emmett-Teller (BET) specific surface areas of TEPO-1, TEPO-2 and TEPO-3 are 485 m 2 g −1 , 534 m 2 g −1 and 592 m 2 g −1 , respectively. However, these three polymers have strong affinity for CO 2 , which exhibit relatively high sorption abilities for CO 2 (273 K/1.0 bar: 6.52 wt%, 7.62 wt%, and 8.40 wt%). Meanwhile, the TEPOs demonstrate ultrahigh hydrogen uptake and outstanding CO 2 /CH 4 selectivity compared to analogous materials with similar BET surface areas using C, Si and N as the nodes. This work reveals clearly that the gas uptake capacity of material is highly dependent on the length of the rigid skeleton and the modification of functional groups in the monomer structure. Three new conjugated microporous polymers are synthesized with high CO 2 and H 2 uptake and great CO 2 /CH 4 selectivity. 出版日期： 2014-12-16 資源來源： Royal Society of Chemistry 識別號： ISSN: 1144-0546 識別號： EISSN: 1369-9261 識別號： DOI: 10.1039/c4nj01477d
