A robust microporous metal-organic framework constructed from a flexible organic linker for acetylene storage at ambient temperature

By using an octadentate ligand tetrakis[(3,5-dicarboxyphenoxy) methyl]methane (H8L), a new microporous metal-organic framework [Cu4L(H2O)(4)](H2O)(31) (1) was solvothermally synthesized and structurally characterized. MOF 1 is built from the 4-connected square planar [Cu-2(O2CR)(4)] cluster and 8-connected cube ligand L to have a highly open framework with scu topology. It possesses permanent porosity as confirmed by N-2, H-2, C2H2, CO2 and CH4 gas adsorption measurements and exhibits high acetylene storage of 193 and 154 cm(3) g(-1) at 273 and 296 K under 1 atm, respectively.