Record‐Breaking H<sub>2</sub>S Capture and ppm‐Level Sensing with a Chemically Stable Porous Organic Cage
The first experimental investigation of a porous organic cage (POC) for the challenging task of H<sub>2</sub>S capture is reported. The N-containing cage molecular material, a tertiary amine POC (6FT-RCC3), demonstrates the highest H<sub>2</sub>S (hydrogen sulfide) capture (record capacity) for a porous material at room temperature and atmospheric pressure (20.6 mmol H<sub>2</sub>S g<sup>-1</sup>; 25 H<sub>2</sub>S molecules per cage) combined with excellent reversibility for at least five adsorption-desorption cycles. In situ FTIR spectroscopy, solid-state <sup>13</sup>C, and <sup>15</sup>N 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 H<sub>2</sub>S, where a clear H<sub>2</sub>S 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 H<sub>2</sub>S.
Authors
- Enrique Lima (ORCID: https://orcid.org/0000-0002-5168-5981)
- Catalina V. Flores (ORCID: https://orcid.org/0000-0002-4291-9272)
- 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)
- Marco A. Vera (ORCID: https://orcid.org/0000-0002-8191-8256)
- Ilich A. Ibarra (ORCID: https://orcid.org/0000-0002-8573-8033)
- Diego Solís-Ibarra (ORCID: https://orcid.org/0000-0002-2486-0967)
- J.A. de los Reyes (ORCID: https://orcid.org/0000-0003-1962-9848)
- Aída Gutiérrez‐Alejandre (ORCID: https://orcid.org/0000-0002-8387-6387)
- Sanliang Ling (ORCID: https://orcid.org/0000-0003-1574-7476)
- Dingyue Hu (ORCID: https://orcid.org/0000-0001-8785-3636)
- Ming Liu (ORCID: https://orcid.org/0000-0003-0008-1480)
- J. Gabriel Flores (ORCID: https://orcid.org/0000-0002-4638-6741)
- Valeria B. López‐Cervantes
Institutions
- University of Nottingham (GB)
- Universidad Autónoma Metropolitana (MX)
- Instituto Politécnico Nacional (MX)
- Zhejiang University (CN)
- Universidad Nacional Autónoma de México (MX)
Publication Details
- Journal
- Small
- Published
- 2024-11-06
- DOI
- https://doi.org/10.1002/smll.202408155
- Citations
- 9
- Primary Topic
- Industrial Gas Emission Control
- Type
- article
- Field-Weighted Citation Impact
- 1.91
Funders
- Salt Science Research Foundation
- Leverhulme Trust
- National Natural Science Foundation of China
- Leverhulme Research Centre for Functional Materials Design
- Engineering and Physical Sciences Research Council
- Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México