Induction of trimeric [Mg-3(OH)(CO2)(6)] in a porous framework by a desymmetrized tritopic ligand

The use of a desymmetrized tritopic ligand with both carboxyl and pyridyl functionalities leads to the first occurrence of the [Mg-3(mu(3)-OH)(CO2)(6)] trimer as the 3-D framework building block in a porous crystal that shows relatively high H-2 uptake (1.37% at 77 K and 1 atm).