Highly Active and Reusable Kenaf Cellulose Supported Bio-Poly(hydroxamic acid) Functionalized Copper Catalysts for C–N Bond Formation Reactions

• Published in: Bioresources Vol. 12; no. 1; pp. 882 - 898
• Main Authors: Mohamad Ros, Siti Hajar, Islam, Md. Shaharul, Rahman, Md. Lutfor, Rashid, Shah Samiur, Chowdhury, Zaira Zaman, Ali, Md. Eaqub, Sarkar, Shaheen M.
• Format: Journal Article
• Language: English
• Published: North Carolina State University 01-02-2017
• Subjects: Graft Co-polymerization; Catalyst; Poly(hydroxamic acid); Polymer; Cellulose
• ISSN: 1930-2126; 1930-2126
• DOI: 10.15376/biores.12.1.882-898

Distinctly active poly(hydroxamic acid) anchored copper (Cu) catalysts were synthesized from chemically modified kenaf cellulose. They were characterized by Fourier transform infrared spectroscopy (FT-IR), field emission scanning microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), inductively coupled plasma atomic emission spectrometry (ICP-AES), UV-vis spectroscopy (UV), and X-ray photoelectron spectroscopy (XPS). The Cu-catalysts were successfully applied to the Michael addition reaction of amines with α,β-unsaturated carbonyl/cyano compounds and to the Click reactions of organoazides with alkynes under mild reaction conditions. The catalysts enabled excellent yields (88% to 95%) in both of the C–N bond formation reactions and showed easy recycling with outstanding reusability for seven cycles without any distinguished decrease in their catalytic activity.