Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 184, Issue -, Pages 454-462Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.06.105
Keywords
Ionic chitosan Schiff bases; Palladium (II) and Ru(II) complexes; Suzuki reaction
Funding
- College of Sciences and Arts, University of Jeddah [UJ-20-099-DR]
Ask authors/readers for more resources
The newly developed IVCSSB scaffold effectively supports Pd(II) and Ru(II) ions in Suzuki coupling reactions, exhibiting excellent catalytic activity and stability. Pd(II)IVCSSB1 maintains its catalytic activity even after five consecutive operation runs and shows excellent selectivity towards cross-coupling reactions.
Taking the advantage of multifunctional characteristics of chitosan (CS), we have developed new scaffolds (imidazolium-vanillyl-chitosan Schiff bases (IVCSSBs)) for supporting Pd(II) and Ru(II) ions in catalyzing Suzuki coupling reactions. The structures of new materials were described based on their elemental, spectral, thermal, and microscopic analysis. The strong interactions between the binding sites of IVCSSB ligand (OH, H-C=N, and OCH3 groups) and Pd(II) ions resulted in the formation of an excellent heterogeneous catalyst (Pd(II)IVCSSB1) with amazing catalytic activity (up to 99%) and highly stable in the reaction medium. The reusability experiments for Pd(II)IVCSSB1 revealed that there is no appreciable decrease in its catalytic activity even after five consecutive operation runs. Furthermore, this heterogeneous catalyst showed an excellent selectivity toward the cross-coupling reaction where no homo-coupling byproducts were observed in the 1H NMR spectra of the obtained products. Consequently, the present ionic catalytic system may open a new window for a novel generation of ionic bio-based catalysts for organic transformations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available