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Porous Polybenzimidazoles via Template‐Free Suzuki Coupling Polymerization: Preparation, Porosity, and Heterogeneous Catalytic Activity in Knoevenagel Condensation Reactions
Author(s) -
Zhang XinJian,
Bian Ning,
Mao LiJuan,
Chen Qi,
Fang Ling,
Qi AiDi,
Han BaoHang
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200074
Subject(s) - knoevenagel condensation , catalysis , polymer chemistry , polymerization , chemistry , suzuki reaction , physisorption , porosity , heterogeneous catalysis , coupling reaction , chemical engineering , organic chemistry , polymer , palladium , engineering
Suzuki coupling polymerization between boronic acids and halo‐benzimidazole provides a new alternative approach to prepare polybenzimidazoles. PPBIs (PPBI‐1 and PPBI‐2) with porous structures are prepared through a template‐free synthetic route. The Brunauer–Emmett–Teller specific surface areas for PPBI‐1 and PPBI‐2 are 385 and 158 m 2 g −1 , respectively. Based on the hydrogen physisorption isotherms measured at 77 K and a pressure up to 1.13 bar, PPBI‐1 exhibits a hydrogen uptake of 0.83 wt% at 1.13 bar and 77 K. An increase in the carbon dioxide loading capacity with increasing specific surface area is observed, in which PPBI‐1 shows higher carbon dioxide uptake (8.0 wt%) than PPBI‐2 (6.1 wt%) at 1.0 bar and 273 K. Additionally, the prepared PPBIs can act as a heterogeneous catalyst for Knoevenagel reaction.