Hydrogen Adsorption in Ultramicroporous Metal-Organic Frameworks Featuring Silent Open Metal Sites.

In this study, we utilized an ultramicroporous metal-organic framework (MOF) named [Ni(pzdc)(ade)(HO)]·2.18HO (where Hpzdc represents pyrazole-3,5-dicarboxylic acid and ade represents adenine) for hydrogen (H) adsorption. Upon activation, [Ni(pzdc)(ade)] was obtained, and in situ carbon monoxide loading by transmission infrared spectroscopy revealed the generation of open Ni(II) sites.