期刊
CRYSTENGCOMM
卷 14, 期 3, 页码 1021-1026出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ce06126g
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资金
- Japan Society for the Promotion of Science (JSPS) [23550052]
- Grants-in-Aid for Scientific Research [23550052] Funding Source: KAKEN
Described are the crystal structures and solid-gas sorption behaviors of azacalix[4]arene tetramethyl ether at low temperatures. Single crystals of the azacalix[4]arene with a seemingly nonporous crystal architecture exhibited highly selective uptake of CO2 among five examined gases such as N-2, O-2, Ar, CO2, and CH4. Single crystal X-ray crystallographic analysis successfully visualized the CO2 sorption state in which the azacalix[4]arene contacted with CO2 through intermolecular CH/O-interactions. A combination of the experimental results and theoretical calculations on the CO2 sorption state demonstrated that the observed high selectivity for CO2 was mainly controlled by a dispersion force, together with a molecular sieving effect.
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