A Hydrogen‐Bonded Organic Framework (HOF) with Type IV NH₃ Adsorption Behavior

An S‐shaped gas isotherm pattern displays high working capacity in pressure‐swing adsorption cycle, as established for CO₂, CH₄, acetylene, and CO. However, to our knowledge, this type of adsorption behavior has not been revealed for NH₃ gas. Herein, we design and characterize a hydrogen‐bonded organic framework (HOF) that can adsorb NH₃ uniquely in an S‐shape (type IV) fashion. While conventional porous materials, mostly with type I NH₃ adsorption behavior, require relatively high regeneration temperature, this platform which has significant working capacity is easily regenerated and recyclable at room temperature.

DOI : 10.1002/anie.201911087