Highly Permeable Benzotriptycene-Based Polymer of Intrinsic Microporosity

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• 作者：Ian Rose ; Mariolino Carta ; Richard Malpass-Evans ; Maria-Chiara Ferrari ; Paola Bernardo ; Gabriele Clarizia ; Johannes C. Jansen ; Neil B. McKeown
• 刊名：ACS Macro Letters
• 出版年：2015
• 出版时间：September 15, 2015
• 年：2015
• 卷：4
• 期：9
• 页码：912-915
• 全文大小：309K
• ISSN：2161-1653

文摘

A novel polymer of intrinsic microporosity (PIM) was prepared from a diaminobenzotriptycene monomer using a polymerization reaction based on Tr枚ger鈥檚 base formation. The polymer (PIM-BTrip-TB) demonstrated an apparent Brunauer, Emmet, and Teller (BET) surface area of 870 m² g^鈥?, good solubility in chloroform, excellent molecular mass, high inherent viscosity and provided robust thin films for gas permeability measurements. The polymer is highly permeable (e.g., PH₂ = 9980; PO₂ = 3290 Barrer) with moderate selectivity (e.g., PH₂/PN₂ = 11.0; PO₂/PN₂ = 3.6) so that its data lie over the 2008 Robeson upper bounds for the H₂/N₂, O₂/N₂, and H₂/CH₄ gas pairs and on the upper bound for CO₂/CH₄. On aging, the polymer demonstrates a drop in permeability, which is typical for ultrapermeable polymers, but with a significant increase in gas selectivities (e.g., PO₂ = 1170 Barrer; PO₂/PN₂ = 5.4).