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Overcoming the Trade‐Off between C2H2 Sorption and Separation Performance by Regulating Metal‐Alkyne Chemical Interaction in Metal‐Organic Frameworks.
- Source :
-
Angewandte Chemie International Edition . 5/22/2023, Vol. 62 Issue 22, p1-8. 8p. - Publication Year :
- 2023
-
Abstract
- Designing porous materials for C2H2 purification and safe storage is essential research for industrial utilization. We emphatically regulate the metal‐alkyne interaction of PdII and PtII on C2H2 sorption and C2H2/CO2 separation in two isostructural NbO metal–organic frameworks (MOFs), Pd/Cu‐PDA and Pt/Cu‐PDA. The experimental investigations and systematic theoretical calculations reveal that PdII in Pd/Cu‐PDA undergoes spontaneous chemical reaction with C2H2, leading to irreversible structural collapse and loss of C2H2/CO2 sorption and separation. Contrarily, PtII in Pt/Cu‐PDA shows strong di‐σ bond interaction with C2H2 to form specific π‐complexation, contributing to high C2H2 capture (28.7 cm3 g−1 at 0.01 bar and 153 cm3 g−1 at 1 bar). The reusable Pt/Cu‐PDA efficiently separates C2H2 from C2H2/CO2 mixtures with satisfying selectivity and C2H2 capacity (37 min g−1). This research provides valuable insight into designing high‐performance MOFs for gas sorption and separation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 62
- Issue :
- 22
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 163703945
- Full Text :
- https://doi.org/10.1002/anie.202302882