Record‐Breaking H2S Capture and ppm‐Level Sensing with a Chemically Stable Porous Organic Cage

Obeso, Juan L.; Hu, Dingyue; López‐Cervantes, Valeria B.; Amador‐Sánchez, Yoarhy A.; Flores, Catalina V.; Flores, J. Gabriel; Ling, Sanliang; Lima, Enrique; Gutiérrez‐Alejandre, Aída; Vera, Marco A.; Peralta, Ricardo A.; de los Reyes, José Antonio; Solis‐Ibarra, Diego; Ibarra, Ilich A.; Liu, Ming

Abstract

The first experimental investigation of a porous organic cage (POC) for the challenging task of H2S capture is reported. The N-containing cage molecular material, a tertiary amine POC (6FT-RCC3), demonstrates the highest H2S (hydrogen sulfide) capture (record capacity) for a porous material at room temperature and atmospheric pressure (20.6 mmol H2S g−1; 25 H2S molecules per cage) combined with excellent reversibility for at least five adsorption–desorption cycles. In situ FTIR spectroscopy, solid-state 13C, and 15N CP MAS NMR spectroscopy experiments are applied to investigate the adsorption mechanism, identifying relatively weak interactions via hydrogen bonding. In addition, the fluorescence performances of this POC material are evaluated for the detection and sensing of H2S, where a clear H2S selectivity is observed over other gases. Remarkably, the limit of detection (LOD) is calculated to be 0.13 mm (≈4.43 ppm) in a tetrahydrofuran (THF) solution of H2S.

Citation

Obeso, J. L., Hu, D., López‐Cervantes, V. B., Amador‐Sánchez, Y. A., Flores, C. V., Flores, J. G., Ling, S., Lima, E., Gutiérrez‐Alejandre, A., Vera, M. A., Peralta, R. A., de los Reyes, J. A., Solis‐Ibarra, D., Ibarra, I. A., & Liu, M. (2025). Record‐Breaking H2S Capture and ppm‐Level Sensing with a Chemically Stable Porous Organic Cage. Small, 21(2), Article 2408155. https://doi.org/10.1002/smll.202408155

• Journal Article Type: Article
• Acceptance Date: Oct 24, 2024
• Online Publication Date: Nov 6, 2024
• Publication Date: Jan 15, 2025
• Deposit Date: Mar 20, 2025
• Publicly Available Date: Nov 7, 2025
• Journal: Small
• Print ISSN: 1613-6810
• Electronic ISSN: 1613-6829
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 21
• Issue: 2
• Article Number: 2408155
• DOI: https://doi.org/10.1002/smll.202408155
• Public URL: https://nottingham-repository.worktribe.com/output/46739473
• Publisher URL: https://onlinelibrary.wiley.com/doi/10.1002/smll.202408155
• Additional Information: "This is the peer reviewed version of the following article: J. L. Obeso, D. Hu, V. B. López-Cervantes, Y. A. Amador-Sánchez, C. V. Flores, J. G. Flores, S. Ling, E. Lima, A. Gutiérrez-Alejandre, M. A. Vera, R. A. Peralta, J. A. de los Reyes, D. Solis-Ibarra, I. A. Ibarra, M. Liu, Record-Breaking H2S Capture and ppm-Level Sensing with a Chemically Stable Porous Organic Cage. Small 2024, 21, 2408155.which has been published in final form at https://doi.org/10.1002/smll.202408155 The article must be linked to Wiley’s version of record on Wiley Online Library