A highly porous polyhedron-based metal-organic framework exhibiting large C2H2 storage capability.

A new highly porous polyhedron-based metal-organic framework, namely [Co 3 (5-Bipa) 2 (5-BipaH) 2 (H 2 O) 3 ](DEF) 6 (H 2 O) 3 ( 1 ), built from a linear Co3 cluster and the 5-bromo-Isophthalic acid (5-BipaH 2 ) organic ligand has been synthesized and structurally determined. The resulting 3-D framework 1 features cubo-octahedral and octahedral cages as the Supermolecular Building Block (SBB) with an eight connected reo topology. More importantly, the solvent-free samples of 1 exhibit a high BET surface area of 882 m 2 /g and a large C 2 H 2 uptake capability of 178 cm 3 /g at room temperature and 1 bar. [ABSTRACT FROM AUTHOR]