Department of Chemistry, Seoul National University, Seoul 151-747 (Republic of Korea); Current address: Neutron Science Division, Korea Atomic Energy Research Institute (KAERI), Daejeon, 305-353 (Republic of Korea).
Angew Chem Int Ed Engl. 2014 Jul 21;53(30):7819-22. doi: 10.1002/anie.201404265. Epub 2014 Jun 18.
To develop a metal-organic framework (MOF) for hydrogen storage, SNU-200 incorporating a 18-crown-6 ether moiety as a specific binding site for selected cations has been synthesized. SNU-200 binds K(+), NH4(+), and methyl viologen (MV(2+)) through single-crystal to single-crystal transformations. It exhibits characteristic gas-sorption properties depending on the bound cation. SNU-200 activated with supercritical CO2 shows a higher isosteric heat (Qst) of H2 adsorption (7.70 kJ mol(-1)) than other zinc-based MOFs. Among the cation inclusions, K(+) is the best for enhancing the isosteric heat of the H2 adsorption (9.92 kJ mol(-1)) as a result of the accessible open metal sites on the K(+) ion.
为了开发用于储氢的金属-有机骨架（MOF），合成了 SNU-200，其中包含 18-冠-6 醚部分作为对选定阳离子的特定结合位点。SNU-200 通过单晶到单晶的转变与 K(+)、NH4(+) 和甲紫（MV(2+)）结合。它根据所结合的阳离子表现出特征的气体吸附性质。用超临界 CO2 激活的 SNU-200 显示出比其他基于锌的 MOF 更高的氢气吸附等焓（Qst）（7.70 kJ mol(-1))。在阳离子包含物中，K(+) 是增强氢气吸附等焓（9.92 kJ mol(-1)) 的最佳选择，因为 K(+) 离子上有可及的开放金属位点。
