Gas storage and separation in a water-stable [CuI5BTT3]4− anion framework comprising a giant multi-prismatic nanoscale cage

A novel water-stable open poly-nuclear Cu(I)-based metal-organic framework, [NC2H8]4Cu5(BTT)3·xG (G = guest of DMA and H2O) (1), featuring a giant multi-prismatic nanoscale cage and high CO2/N2 and CO2/H2 sorption selectivities, was successfully assembled by using the nitrogen-rich ligand of 1,3,5-tris(2H-tetrazol-5-yl)benzene (H3BTT) to bridge two types of Cu3 and Cu2 clusters.