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A TEMPO supported-deep eutectic solvent as a novel and capable catalyst for alcohol oxidations
Maryam Mahmoudiani Gilan1, Davood Habibi2
1Department of Organic Chemistry, Faculty of Chemistry and Petroleum Sciences, Bu-Ali Sina University, Hamedan, Iran.
Scientific Reports
|July 1, 2025
Summary
This study introduces a novel TEMPO-supported deep eutectic solvent (DES) catalyst for alcohol oxidation. This eco-friendly system efficiently converts alcohols to aldehydes and ketones using molecular oxygen, with catalyst recovery and reuse.
Area of Science:
- Organic Chemistry
- Catalysis
- Green Chemistry
Background:
- Oxidation reactions are crucial in chemical synthesis and industry.
- Developing efficient, eco-friendly catalysts and oxidants is essential.
- Existing TEMPO-based systems often require metal co-catalysts.
Purpose of the Study:
- To develop a novel catalytic system for alcohol oxidation using deep eutectic solvents (DESs) containing a TEMPO unit.
- To utilize molecular oxygen as a sustainable terminal oxidant.
- To investigate the catalytic performance and recyclability of the developed system.
Main Methods:
- Preparation of a TEMPO-supported DES (TEMPO-DES) by combining a quaternary ammonium salt with TEMPO ([Quaternium-TEMPO]+Cl-) and glycine.
- Utilizing the TEMPO-DES in conjunction with Fe(NO3)3·9H2O as a catalytic system.
- Performing aerobic oxidation of various alcohols under mild, solvent-free conditions using molecular oxygen.
Main Results:
- The TEMPO-DES/Fe(NO3)3 system demonstrated excellent catalytic performance.
- Selective oxidation of diverse alcohols to their corresponding aldehydes and ketones was achieved.
- The deep eutectic solvent catalyst was easily recovered and reused with minimal loss of activity.
Conclusions:
- A novel and efficient TEMPO-supported DES catalytic system for alcohol oxidation has been successfully developed.
- This system offers a green and sustainable alternative for synthesizing aldehydes and ketones.
- The recyclability of the DES catalyst highlights its potential for industrial applications.
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