Porosity enhancement of carbazolic porous organic frameworks using dendritic building blocks for gas storage and separation

Xiang Zhang, Jingzhi Lu, Jian Zhang

Research output: Contribution to journalArticle

130 Scopus citations

Abstract

We report a facile synthesis of carbazolic porous organic frameworks (Cz-POFs) via FeCl3 promoted oxidative polymerization. Using bulky, dendritic building blocks with high connectivity, the porosity of Cz-POFs was significantly enhanced. Specifically, Cz-POF-1 and Cz-POF-3 show high surface areas of 2065 and 1927 m2 g-1, respectively. These surface areas are 3.1 and 2.1 times larger than those of Cz-POF-2 and Cz-POF-4 constructed from less branched building blocks, respectively. At 1 bar and 273 K, Cz-POF-3 exhibits the highest CO2 uptake (21.0 wt %) and CH 4 uptake (2.54 wt %), while Cz-POF-1 has the highest H2 uptake (2.24 wt %) at 77 K. These values are among the highest reported for porous organic polymers. In addition, Cz-POFs exhibit good ideal CO 2/N2 selectivities (19-37) and CO2/CH 4 selectivities (4.4-7.1) at 273 K, showing great promise for gas storage and separation applications.

Original languageEnglish (US)
Pages (from-to)4023-4029
Number of pages7
JournalChemistry of Materials
Volume26
Issue number13
DOIs
StatePublished - Jul 8 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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