Amino-Functionalised Hybrid Ultramicroporous Materials that Enable Single-Step Ethylene Purification from a Ternary Mixture.

ABSTRACT: Pyrazine-linked hybrid ultramicroporous (pore size <7 Å) materials (HUMs) offer benchmark performance for trace carbon capture thanks to strong selectivity for CO₂ over small gas molecules, including light hydrocarbons. That the prototypal pyrazine-linked HUMs are amenable to crystal engineering has enabled second generation HUMs to supersede the performance of the parent HUM, SIFSIX-3-Zn, mainly through substitution of the metal and/or the inorganic pillar. Herein, we report that two isostructural aminopyrazine-linked HUMs, MFSIX-17-Ni (17=aminopyrazine; M=Si, Ti), which we had anticipated would offer even stronger affinity for CO₂ than their pyrazine analogs, unexpectedly exhibit reduced CO₂ affinity but enhanced C₂ H₂ affinity. MFSI

SUBMITTER: Mukherjee S 

PROVIDER: S-EPMC8252428 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature