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Updated: Jul 21, 2025
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Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
Published on: November 9, 2019
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CO2 complexation with cyclodextrins
Cecilie Høgfeldt Jessen1, Jesper Bendix1, Theis Brock Nannestad1
1Department of Chemistry & Niels Bohr Institute, University of Copenhagen, 2100 København Ø, Denmark.
Beilstein Journal of Organic Chemistry
|July 27, 2023
Summary
Cyclodextrins (CDs) show promise for capturing carbon dioxide (CO2). Per-O-methyl alpha-cyclodextrin demonstrated the highest CO2 affinity among the tested cyclodextrins, offering potential for carbon capture technologies.
Area of Science:
- Environmental Science
- Materials Science
- Chemistry
Background:
- Industrial processes, power generation, and transportation release significant carbon dioxide (CO2) emissions.
- Global warming and climate change are exacerbated by rising CO2 levels.
- Carbon capture and storage (CCS) technologies are crucial for mitigating climate change impacts.
Purpose of the Study:
- To investigate the binding efficiency of various cyclodextrins (CDs) as CO2 capture agents.
- To evaluate the potential of CDs in reducing CO2 emissions.
- To identify cyclodextrins with high CO2 affinity for practical applications.
Main Methods:
- Investigated the binding efficiency of multiple cyclodextrins towards CO2.
- Determined the stoichiometry of alpha-cyclodextrin with CO2 through crystal structure analysis.
- Measured CO2 binding affinity (Kg) in water for simple and modified cyclodextrins.
Main Results:
- The crystal structure of alpha-cyclodextrin with CO2 exhibits a 1:1 stoichiometry.
- Several simple and modified cyclodextrins bind CO2 in water with a Kg ranging from 0.18-1.2 bar-1 (7-35 M-1).
- Per-O-methyl alpha-cyclodextrin displayed the highest affinity for CO2 among the tested compounds.
Conclusions:
- Cyclodextrins are effective agents for capturing carbon dioxide.
- Modified cyclodextrins, particularly per-O-methyl alpha-cyclodextrin, show significant potential for CO2 capture applications.
- The findings support the development of cyclodextrin-based technologies for carbon capture and climate change mitigation.
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