Achieving Sub‐ppm Sensitivity in SO <sub>2</sub> Detection with a Chemically Stable Covalent Organic Framework
Abstract We report the inaugural experimental investigation of covalent organic frameworks (COFs) to address the formidable challenge of SO 2 detection. Specifically, an imine‐functionalized COF (SonoCOF‐9) demonstrated a modest and reversible SO 2 sorption of 3.5 mmol g −1 at 1 bar and 298 K. At 0.1 bar (and 298 K), the total SO 2 uptake reached 0.91 mmol g −1 with excellent reversibility for at least 50 adsorption‐desorption cycles. An isosteric enthalpy of adsorption (Δ H ads ) for SO 2 equaled −42.3 kJ mol −1 , indicating a relatively strong interaction of SO 2 molecules with the COF material. Also, molecular dynamics simulations and Møller–Plesset perturbation theory calculations showed the interaction of SO 2 with π density of the rings and lone pairs of the N atoms of SonoCOF‐9. The combination of experimental data and theoretical calculations corroborated the potential use of this COF for the selective detection and sensing of SO 2 at the sub‐ppm level (0.0064 ppm of SO 2 ).
Authors
- Juan L. Obeso (ORCID: https://orcid.org/0000-0002-8876-9484)
- Yoarhy A. Amador‐Sánchez (ORCID: https://orcid.org/0000-0002-5107-5358)
- Ricardo A. Peralta (ORCID: https://orcid.org/0000-0001-7573-2968)
- Ilich A. Ibarra (ORCID: https://orcid.org/0000-0002-8573-8033)
- Wei Juan Zhao (ORCID: https://orcid.org/0000-0003-0265-2590)
- Elı́ Sánchez-González (ORCID: https://orcid.org/0000-0002-5440-329X)
- Diego Solís-Ibarra (ORCID: https://orcid.org/0000-0002-2486-0967)
- Junyu Ren (ORCID: https://orcid.org/0000-0002-4308-0093)
- Mounib Bahri (ORCID: https://orcid.org/0000-0002-8336-9158)
- Giovanni Barcaro (ORCID: https://orcid.org/0000-0002-5520-5914)
- Susanna Monti (ORCID: https://orcid.org/0000-0002-3419-7118)
- Nigel D. Browning (ORCID: https://orcid.org/0000-0003-0491-251X)
- Dan Zhao (ORCID: https://orcid.org/0000-0002-4427-2150)
- Valeria B. López‐Cervantes
Institutions
- University of Liverpool (GB)
- National University of Singapore (SG)
- National Academies of Sciences, Engineering, and Medicine (US)
- Universidad Autónoma Metropolitana (MX)
- Institute for the Chemistry of OrganoMetallic Compounds (IT)
- Institute for Chemical and Physical Processes (IT)
- Instituto Politécnico Nacional (MX)
- Universidad Nacional Autónoma de México (MX)
Publication Details
- Journal
- Angewandte Chemie
- Published
- 2024-09-19
- DOI
- https://doi.org/10.1002/ange.202415088
- Citations
- 3
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.63
Funders
- Agency for Science, Technology and Research
- National Research Foundation Singapore
- Energy Market Authority of Singapore
- Ministry of Education - Singapore