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Neutron; diffraction; hydrogen; adsorption; structure.

We review recent structural studies that we have undertaken aimed at elucidating the fundamental properties of metal-organic framework materials and their interactions with hydrogen. We have shown that exposing coordinatively unsaturated metal centers can greatly enhance the hydrogen binding energy and that they result in a significant increase of the surface packing density of adsorbed hydrogen molecules on materials' surface. We will review some of the structural aspects of these materials, especially the adsorbed hydrogen molecule surface packing density in one type of metal-organic framework, MOF-74, which can be packed even denser than that in solid hydrogen.

Craig M Brown¹ Yun Liu^{1 2} Dan A Neumann¹

1. National Institute of Standards and Technology, Center for Neutron Research, 100 Bureau Drive, MS 6102, Maryland 20899, USA
2. Department of Material Science and Engineering, University of Maryland, College Park, Maryland 20742, USA

Published

October 2008