Cellulose Supported Pd(II) Complex Catalyzed Carbon-Carbon Bonds Formation
Shaheen M Sarkar1, S S Rashid2, Kaykobad Md Rezaul Karim3
1Bernal Institute, Department of Chemical Sciences, University of Limerick, Castletroy, Limerick V94, Ireland.
Journal of Nanoscience and Nanotechnology
|December 4, 2018
Summary
Researchers developed a novel palladium complex from corn-cobs, demonstrating high catalytic activity in Suzuki and Heck coupling reactions. This sustainable catalyst was successfully recycled five times with consistent performance.
Area of Science:
- Materials Science
- Catalysis
- Green Chemistry
Background:
- Agro-industrial waste, such as corn-cobs, presents a significant disposal challenge.
- Cellulose, a major component of corn-cobs, is a renewable and abundant biopolymer.
- Developing sustainable catalytic systems is crucial for environmentally friendly chemical synthesis.
Purpose of the Study:
- To isolate cellulose from corn-cobs and synthesize a novel palladium complex.
- To characterize the synthesized complex using advanced spectroscopic techniques.
- To evaluate the catalytic performance of the complex in Suzuki and Heck coupling reactions.
Main Methods:
- Cellulose isolation from corn-cobs.
- Modification of cellulose into a polymeric hydroxamic acid palladium complex.
- Characterization using FE-SEM, EDX, TEM, XRD, XPS, and ICP-AES.
- Catalytic testing in Suzuki and Heck coupling reactions.
Main Results:
- Successful synthesis and characterization of the palladium complex (complex 1).
- Complex 1 exhibited high catalytic activity for Suzuki and Heck couplings of aryl halides.
- High yields of coupling products were achieved with both activated and deactivated aryl halides.
- The catalyst demonstrated excellent recyclability, with no significant performance loss after five cycles.
Conclusions:
- Corn-cob derived cellulose can be effectively utilized to create a recyclable palladium catalyst.
- The developed palladium complex is a highly efficient catalyst for key cross-coupling reactions.
- This approach offers a sustainable and cost-effective alternative for palladium-based catalysis.
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