A rare porous zinc phosphonocarboxylate framework with high thermal stability and interesting structural transformation

Abstract

A rare porous zinc-organic framework with ultrahigh thermal stability over 500°C was obtained, which exhibits a CaF2-type topology formed by 8-connected tetranuclear Zn4 clusters and 4-connected phosphonocarboxylate ligands. Interestingly, the similar reactions to the zinc-organic framework but in the absence of H2O or by the replacement of Zn2+ with Co2+ can yield three different 3D cluster-based frameworks but with the same CaF2-type topology.