Achieving Sub‐ppm Sensitivity in SO2 Detection with a Chemically Stable Covalent Organic Framework.
| Title: | Achieving Sub‐ppm Sensitivity in SO |
|---|---|
| Authors: | Zhao, Wei, Obeso, Juan L., López‐Cervantes, Valeria B., Bahri, Mounib, Sánchez‐González, Elí, Amador‐Sánchez, Yoarhy A., Ren, Junyu, Browning, Nigel D., Peralta, Ricardo A., Barcaro, Giovanni, Monti, Susanna, Solis‐Ibarra, Diego, Ibarra, Ilich A., Zhao, Dan |
| Source: | Angewandte Chemie; 1/15/2025, Vol. 137 Issue 3, p1-7, 7p |
| Subject Terms: | ATMOSPHERIC sulfur dioxide, ADSORPTION (Chemistry), SORPTION, MOLECULAR dynamics, MATHEMATICAL models, POROUS materials |
| Abstract: | We report the inaugural experimental investigation of covalent organic frameworks (COFs) to address the formidable challenge of SO2 detection. Specifically, an imine‐functionalized COF (SonoCOF‐9) demonstrated a modest and reversible SO2 sorption of 3.5 mmol g−1 at 1 bar and 298 K. At 0.1 bar (and 298 K), the total SO2 uptake reached 0.91 mmol g−1 with excellent reversibility for at least 50 adsorption‐desorption cycles. An isosteric enthalpy of adsorption (ΔHads) for SO2 equaled −42.3 kJ mol−1, indicating a relatively strong interaction of SO2 molecules with the COF material. Also, molecular dynamics simulations and Møller–Plesset perturbation theory calculations showed the interaction of SO2 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 SO2 at the sub‐ppm level (0.0064 ppm of SO2). [ABSTRACT FROM AUTHOR] |
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| Database: | Complementary Index |
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