Absorption of Atmospheric CO2 as Carbonate Inside the Molecular Cavity of a New Tripodal Hexaurea Receptor

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• 作者：Avijit Pramanik ; Maryam Emami Khansari ; Douglas R. Powell ; Frank R. Fronczek ; Md. Alamgir Hossain
• 刊名：Organic Letters
• 出版年：2014
• 出版时间：January 17, 2014
• 年：2014
• 卷：16
• 期：2
• 页码：366-369
• 全文大小：275K
• ISSN：1523-7052

文摘

A new hexaurea receptor has been synthesized, which absorbs atmospheric CO₂ to produce an air-stable solid carbonate complex under normal conditions. Structural analysis of the carbonate complex with this receptor suggests that the carbonate is fully encapsulated within its highly organized intramolecular cavity via 12 strong NH路路路O bonds in the range of 2.703(3)鈥?.989(3) 脜 from six urea units, with each anionic oxygen coordinated via four NH路路路O bonds with two urea groups.