Phosphine oxide-based conjugated microporous polymers with excellent CO2 capture properties

Shanlin Qiao, Wei Huang, Zhengkun Du, Xianghui Chen, Fa Kuen Shieh, Renqiang Yang

研究成果: 雜誌貢獻期刊論文同行評審

31 引文 斯高帕斯(Scopus)

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 N2 reveal that the Brunauer-Emmett-Teller (BET) specific surface areas of TEPO-1, TEPO-2 and TEPO-3 are 485 m2 g-1, 534 m2 g-1 and 592 m2 g-1, respectively. However, these three polymers have strong affinity for CO2, which exhibit relatively high sorption abilities for CO2 (273 K/1.0 bar: 6.52 wt%, 7.62 wt%, and 8.40 wt%). Meanwhile, the TEPOs demonstrate ultrahigh hydrogen uptake and outstanding CO2/CH4 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.

原文???core.languages.en_GB???
頁(從 - 到)136-141
頁數6
期刊New Journal of Chemistry
39
發行號1
DOIs
出版狀態已出版 - 1 1月 2015

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