Ammonia is a potential improvised chemical weapon, and high-capacity materials for its capture from the vapor phase are of current interest in the context of human protection. Several metal-organic frameworks (MOFs), especially those featuring hexa-zirconium(IV) nodes, have shown unusual promise as sorbents. Indeed, selected Zr-MOFs, such as amino-functionalized UiO-66, are among the most promising candidate materials for this application. Here we describe the chemical basis for effective NH<sub><sup>3</sup></sub> capture by these materials and then use this knowledge to devise superior MOF-based sorbents. We then show how these concepts and materials can be used to advantage for sorption-based separation of ammonia and dinitrogen.

Capturing and separating ammonia with metal-organic framework materials

255th National Meeting (2018)

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