Abstract

A novel 3D anionic metal-organic framework (MOF) of (Me2 NH2 )4 [Ni8 (PTCA)4 (μ3 -OH)4 (H2 O)4 ](DMF)5 (H2 O)13 (H4 PTCA=pyrene-1,3,6,8-tetracarboxylic acid) has been synthesized, in which Me2 NH2 + can be exchanged by Li+ ions. The results of gas sorption measurements indicate that the desolvated MOFs both before and after Li+ exchange show highly selective adsorption for CO2 over CH4 and N2 gases, and the Li+ -exchanged MOF exhibits enhanced CO2 , CH4 , and H2 storage properties.

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