Negative electrostatic potentials in a Hofmann-type metal-organic framework for efficient acetylene separation.

ABSTRACT: Efficient adsorptive separation of acetylene (C₂H₂) from carbon dioxide (CO₂) or ethylene (C₂H₄) is industrially important but challenging due to the identical dynamic diameter or the trace amount. Here we show an electrostatic potential compatible strategy in a nitroprusside-based Hofmann-type metal-organic framework, Cu(bpy)NP (NP = nitroprusside, bpy = 4,4'-bipyridine), for efficient C₂H₂ separation. The intruding cyanide and nitrosyl groups in undulating one-dimensional channels induce negative electrostatic potentials for preferential C₂H₂ recognition instead of open metal sites in traditional Hofmann-type MOFs. As a result, Cu(bpy)NP exhibits a 50/50 C₂H₂/CO_2<

SUBMITTER: Liu Y 

PROVIDER: S-EPMC9489771 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature