Development of cellulose-supported Pd-nanocatalyst for the heck coupling and michael addition reactions

Shaheen M. Sarkar and Md Lutfor Rahman and Kamrul Hasan and Md. Maksudur Rahman Khan and Emmet J. O’Reilly and Mohd Hasbi Ab. Rahim (2024) Development of cellulose-supported Pd-nanocatalyst for the heck coupling and michael addition reactions. Carbohydrate Polymer Technologies and Applications, 8. pp. 1-12. ISSN 2666-8939

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Abstract

The development of reusable, bio-resource based nanocatalysts with high turnover numbers (TONs) is essential for increased sustainability in the chemical sector. Herein, cellulose-supported bio-resourced poly(hydroxamic acid) is employed as a ligand in the synthesis of a palladium nanocomposite (PdNc-PHA) that exhibits higher TONs that previously reported similar systems for the Mizoroki-Heck and Michael addition reactions. The PdNcPHA catalyst was characterised using Fourier transform infrared spectroscopy (FTIR), field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectrometry (EDX), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analyses. Results showed that the PdNc-PHA catalyst exhibits excellent durability and high catalytic activity in the Mizoroki-Heck and Michael addition reactions, leading to high yields of the desired corresponding products. The Mizoroki-Heck reaction of aryl/heteroaryl chlorides with olefins resulted in the production of cross-coupled products, while the Michael addition reaction of phenol/thiophenol and aliphatic cyclic/alicyclic amines with a variety of olefins synthesised the corresponding O-, S-, and Nalkylated products. The recycle and reusability of the catalyst were tested using 4-nitrochlorobenzene and butyl acrylate. The results demonstrated that the catalyst maintained its catalytic activity effectively for up to ten cycles without any noticeable loss in performance. This research represents a promising strategy for efficient catalysis based on bio-waste as a wealth material.

Item Type:	Article
Keyword:	Addition reaction, Aryl chloride, CorncobHeck reaction, Palladium nanocomposite, Poly
Subjects:	Q Science > Q Science (General) > Q1-390 Science (General) Q Science > QD Chemistry > QD1-999 Chemistry > QD241-441 Organic chemistry
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	20 Nov 2024 10:33
Last Modified:	20 Nov 2024 10:33
URI:	https://eprints.ums.edu.my/id/eprint/41956

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