Sustainable In-Water Synthesis of Aliphatic Porous Polyazines: A Versatile Platform for Conjugated Aerogels, PolyHIPEs, or Carbon Foams

Access to conjugated porous polymers via synthetically sustainable and straightforward routes is highly desirable, as many polymer systems exhibit high performance but require arduous synthetic protocols that rarely pave the way commercial reality. In this article, we describe an easily fabricated series of novel poly(Schiff bases) feature aliphatic backbone obtained with low complexity from simple reagents such glyoxal hydrazine monohydrate in water. The effective synthesis enables preparation three different functional scaffolds, i.e., aerogels, polyHIPEs (polymerized HIPEs), even carbon foams poly(azine) (PAZ) networks. reported approach compared literature using ″green chemistry metrics″, E-factor (SC) index, shows dramatic improvements. An up 0.27 for aerogels or 80 SC index 2.7 are much lower than those poly(arylene)-based analogues, indicating good scalability, sustainability, cost. PAZ materials impressive red/near IR-shifted optical absorption band edges, electrochemical gap 1.45 eV. Aliphatic scaffolds characterized by flexibility aromatic analogues do not fail at compressive loads 70%. Finally, carbonization 500 °C leads carbonaceous a N content 29 wt % (21 mmol nitrogen per gram material).