1620959-59-2Relevant academic research and scientific papers
Hydrogen storage in a potassium-ion-bound metal-organic framework incorporating crown ether struts as specific cation binding sites
Lim, Dae-Woon,Chyun, Seung An,Suh, Myunghyun Paik
, p. 7819 - 7822 (2014)
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(MV2+) 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. Crown ethers strut their stuff: The metal-organic framework SNU-200 incorporates 18-crown-6 moieties as a cation binding site. SNU-200 binds K+, NH4+, and methyl viologen2+ (MV2+) and their counteranions. Its gas sorption properties depend on the bound cation. The K+/SCN - bound SNU-200 shows the highest isosteric heat (9.92 kJ mol -1) of H2 adsorption, a result of the open metal sites on the K+ ions.
