Unveiling Temperature-Induced Structural Phase Transformations and CO₂ Binding Sites in CALF-20.

ABSTRACT: The increase in atmospheric carbon dioxide concentration linked to climate change has created a need for new sorbents capable of separating CO₂ from exhaust gases. Recently, an easily produced metal-organic framework, CALF-20, was shown to withstand over 450,000 adsorption/desorption cycles in steam and wet acid gases. Further development and industrial application of such materials require an understanding of the observed processes. Herein, we demonstrate that conditioning as-synthesized CALF-20 single crystal transforms it into a different phase, γ-CALF-20. The transformation resulted in significant structural changes, including the binding of water molecules to Zn(II), accompanied by a reduction of 9% in the unit cell volume. Our experimental findings were supported by the en

SUBMITTER: Drweska J 

PROVIDER: S-EPMC11483831 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature