High porosity poly(porous liquid)s based on multiple hydrogen bonds for rapid ammonia response

Metal-organic frameworks (MOFs)-based porous liquids (PLs), as a kind of MOFs-based functional material with both permanent porosity and fluidic properties, showing certain application potential in gas adsorption, catalytic conversion and sensing. However, while the liquid state of PLs provides excellent processability, it also restricts its application scope and stability. Herein, through the multiple hydrogen bond interactions between polymerizable deep eutectic solvent (DES) and ZIF-8-NH₂, we proposed a DES-based polymerizable PLs with high porous guest load, and further transformed it into a poly(porous liquid)s (PPLs) with high porosity through the simple free radical polymerization process. Benefiting from the synergistic interplay of its components, the as-prepared PPL (PAIL1.8–20) exhibits excellent mechanical properties (yield strength of 20.76 MPa), rapid NH₃ sensing performance (response time < 60 s), and cycle stability (20 cycles and 1 month). Furthermore, we systematically investigated how the composition and chemical structure affect the properties of PLs and PPLs. Owing to the substrate independence and multifunctionality demonstrated by the PPLs, the PLs reported in this work can be utilized as a functional coating with superior processability, enabling the in situ fabrication of novel wearable gas sensors on various substrates, demonstrating broad application prospects.