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Updated: Sep 11, 2025
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Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
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CO2 Fixation and Release Mediated by Carbonate-Based Coordination Polymers
Kentaro Kadota1, Sae Matsui1, Ayoub Traverson2
1Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-Ku, Kyoto 606-8502, Japan.
Journal of the American Chemical Society
|August 11, 2025
Summary
Researchers synthesized 11 carbonate-based coordination polymers (CPs) from carbon dioxide (CO2). These CPs offer tunable, low-temperature CO2 release (170-230 °C) with high CO2 content (25-30 wt %), ideal for waste heat utilization.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Chemical Engineering
Background:
- Coordination polymers (CPs) offer tunable structures for gas storage and release.
- Carbonate-based CPs are explored for their potential in carbon capture and utilization.
Purpose of the Study:
- To synthesize novel carbonate-based CPs from carbon dioxide (CO2).
- To establish structure-property correlations for CO2 release upon decarbonation.
- To investigate the potential of these CPs for low-temperature heat-driven CO2 release.
Main Methods:
- Synthesis of 11 carbonate-based coordination polymers (CPs) using CO2.
- Variable-temperature synchrotron X-ray diffraction to study structural changes.
- 3D electron diffraction to elucidate the decarbonation mechanism.
Main Results:
- Demonstrated tunable decarbonation temperatures (TCO2) ranging from 170-230 °C.
- Achieved high gravimetric CO2 content (25-30 wt %) in the synthesized CPs.
- Identified metal ion electronegativity and carbonate coordination number as key factors influencing TCO2.
Conclusions:
- The structural tunability of carbonate-based CPs allows for controlled CO2 release at low temperatures.
- These materials are promising for applications utilizing low-grade waste heat.
- The decarbonation mechanism involves the formation of discrete metal complexes.
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