jp302356q_si_002.cif (119.5 kB)
Hydrogen Storage in New Metal–Organic Frameworks
dataset
posted on 2012-06-21, 00:00 authored by David
J. Tranchemontagne, Kyo Sung Park, Hiroyasu Furukawa, Juergen Eckert, Carolyn B. Knobler, Omar M. YaghiFive new metal–organic frameworks (MOFs, termed
MOF-324,
325, 326 and IRMOF-61 and 62) of either short linkers (pyrazolecarboxylate
and pyrazaboledicarboxylate) or long and thin alkyne functionalities
(ethynyldibenzoate and butadiynedibenzoate) were prepared to examine
their impact on hydrogen storage in MOFs. These compounds were characterized
by single-crystal X-ray diffraction, and their low-pressure and high-pressure
hydrogen uptake properties were investigated. In particular, volumetric
excess H2 uptake by MOF-324 and IRMOF-62 outperforms MOF-177
up to 30 bar. Inelastic neutron-scattering studies for MOF-324 also
revealed strong interactions between the organic links and hydrogen,
in contrast to MOF-5 where the interactions between the Zn4O unit and hydrogen are the strongest. These data also show that
smaller pores and polarized linkers in MOFs are indeed advantageous
for hydrogen storage.