Spontaneous and Selective CO2 Sorption under Ambient Conditions in Seemingly Nonporous Molecular Crystal of Azacalix[5]arene Pentamethyl Ether

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• 作者：Hirohito Tsue ; Kohei Ono ; Satoshi Tokita ; Koichi Ishibashi ; Kazuhiro Matsui ; Hiroki Takahashi ; Kazuyuki Miyata ; Daisuke Takahashi ; Rui Tamura
• 刊名：Organic Letters
• 出版年：2011
• 出版时间：February 4, 2011
• 年：2011
• 卷：13
• 期：3
• 页码：490-493
• 全文大小：232K
• 年卷期：v.13,no.3(February 4, 2011)
• ISSN：1523-7052

文摘

Described are the syntheses, crystal structures, and solid鈭抔as adsorption behaviors of azacalix[4]arene tetramethyl ether and azacalix[5]arene pentamethyl ether. While the former compound exhibited no adsorption of four main atmospheric components, the latter selectively and rapidly adsorbed CO₂ at ambient temperature and pressure. X-ray crystallographic and potential energy distribution analysis revealed that azacalix[5]arene created an energetically favorable space for CO₂ in its seemingly nonporous crystal, leading to the observed selective CO₂ uptake under ambient conditions.