A unique (3,10)-connected magnesium/nickel-based metal–organic framework constructed from an unusual kgd supermolecular building layer via mixed linkers and solid solution approach

Abstract

A hydrothermal reaction between mixed linkers and mixed metals, alkaline earth 4MgCO₃·Mg(OH)₂·5H₂O and 3d Ni(CH₃COO₃)₂·4H₂O, resulted in a unique metal–organic framework of SNNU-99 that was impressively isolated and structurally characterized. SNNU-99 was constructed from an unprecedented decanuclear Mg/Ni-based secondary building unit and represents the first (3,10)-connected 3-period net. Alternatively, SNNU-99 can be described through an unusual kgd layer pillared through 2-connected linkers. Due to its specifically structural feature, SNNU-99 has demonstrated selective CO₂ adsorption over N₂.