Copper-supported thiol-functionalized cellulose as a paper-based catalyst for imine synthesis
Issued Date
2025-12-01
Resource Type
eISSN
20452322
Scopus ID
2-s2.0-105000461138
Journal Title
Scientific Reports
Volume
15
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
Scientific Reports Vol.15 No.1 (2025)
Suggested Citation
Sangkaworn J., Limprasart W., Höfler M.V., Gutmann T., Pornsuwan S., Bunchuay T., Tantirungrotechai J. Copper-supported thiol-functionalized cellulose as a paper-based catalyst for imine synthesis. Scientific Reports Vol.15 No.1 (2025). doi:10.1038/s41598-025-95144-1 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/108546
Title
Copper-supported thiol-functionalized cellulose as a paper-based catalyst for imine synthesis
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Abstract
This study presents an appealing approach to sustainable catalysis using cellulose filter paper as a support for copper-catalyzed reactions. The paper was functionalized with thiol groups through a reaction with thioglycolic acid, which served a dual purpose: partially reducing Cu(II) to Cu(I) and stabilizing active copper species via Cu–S interactions. Spectroscopic analysis confirmed the formation of highly dispersed multi-valent Cu2O/CuO on the thiol-functionalized cellulose, resulting in a highly efficient copper catalyst. This catalyst demonstrated excellent performance in the oxidative coupling of various amines to imines, achieving yields of 39–99% within 10–30 min. A key advantage of this system is its reusability; the catalyst maintained remarkable stability and activity over ten reaction cycles with straightforward recovery. This paper-based catalyst offers a promising strategy for eco-friendly and cost-effective synthetic processes, with significant implications for green chemistry and industrial applications.