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Updated: Feb 11, 2026

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
Three Cd(II) MOFs with Different Functional Groups: Selective CO2 Capture and Metal Ions Detection
Zhong-Jie Wang1, Li-Juan Han1, Xiang-Jing Gao1
1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China.
Three new metal-organic frameworks (MOFs) were synthesized. Two MOFs show high CO2 uptake and act as dual sensors for toxic metal ions, Hg2+ and Pb2+, while the third detects Fe3+ and Cu2+.
Area of Science:
- Materials Science
- Coordination Chemistry
- Environmental Science
Background:
- Metal-organic frameworks (MOFs) are porous materials with tunable properties.
- Functional groups within MOFs can enhance gas adsorption and sensing capabilities.
- Cadmium(II) (Cd(II)) based MOFs offer potential for diverse applications.
Purpose of the Study:
- To synthesize novel Cd(II) iso-frameworks using bis(4-(1H-imidazol-1-yl)phenyl)amine (BIPA) and functionalized carboxylic acids.
- To investigate the CO2 adsorption properties of the synthesized MOFs.
- To explore the potential of these MOFs as photoluminescent sensors for metal ions.
Main Methods:
- Hydrothermal synthesis of three Cd(II) iso-frameworks: {[Cd(BIPA)(IPA)]·DMF}n (1), {[Cd(BIPA)(HIPA)]·DMF}n (2), and {[Cd(BIPA)(NIPA)]·2H2O}n (3).
- Gas adsorption analysis to determine CO2 uptake capacity.
- Photoluminescence spectroscopy to evaluate sensing capabilities for metal ions.
Main Results:
- Compounds 1 and 2 demonstrated significant CO2 uptake exceeding 20 wt%, attributed to amino and phenolic hydroxyl functional groups.
- MOFs 1 and 2 function as dual-responsive photoluminescent sensors for Hg2+ and Pb2+ ions with high sensitivity (low detection concentration) and quenching constants.
- MOF 3 exhibited the ability to detect trace amounts of Fe3+ and Cu2+ ions.
Conclusions:
- The presence of amino and phenolic hydroxyl groups in MOFs 1 and 2 significantly enhances CO2 adsorption.
- Cd(II) iso-frameworks based on BIPA are effective dual sensors for Hg2+ and Pb2+ detection.
- The synthesized MOFs show promise for environmental monitoring and gas separation applications.
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