Enhancement of H-2 adsorption in Li+-exchanged co-ordination framework materials

H-2 adsorption in (Me2NH2)[In(L)] is enhanced by exchange of Me2NH2+ for Li+ cations; the Li+-exchanged material displays a lower isosteric heat for H-2 adsorption than the parent material, indicating that the increase in H-2 capacity is due to an increase in the accessible pore volume on cation exchange, while the lower adsorption enthalpy is consistent with increased pore size.