The pre-synthetic pore environment tailoring strategy has been applied to improve low-pressure SO₂ affinity on stable isostructural methyl-functionalized MOFs by controlling methyl groups density. The enhanced low-pressure SO₂ uptake and SO₂ separation was achieved. This work provides a facile strategy to achieve tailor-made MOF adsorbent for challenging gas purification application.

S. Xing, J. Liang, P. Brandt, F. Schäfer, A. Nuhnen, T. Heinen, I. Boldog, J. Möllmer, M. Lange, O. Weingart, C. Janiak, Capture and Separation of SO2 Traces in Metal-Organic Frameworks via Pre-synthetic Pore Environment Tailoring by Methyl Groups, Angew. Chem. Int. Ed. 2021, 60, 17998-18005.