Issue 7, 2014

Sulfonic acid functionalized hyperbranched poly(ether sulfone) as a solid acid catalyst

Abstract

Sulfonic acid functionalized hyperbranched poly(ether sulfone) (SHBPES) was studied as a novel type of solid acid catalyst. Various molecular weights of SHBPESs were tested for the esterification reaction between acetic acid and 1-butanol. The SO3H terminal groups of the SHBPESs work as catalytically active sites, but all tested SHBPESs are totally or partially soluble under the current reaction conditions. To overcome the solubility problem, SHBPES was grafted onto carbon black, and this material, SHBPES/CB, shows fairly good catalytic activity and promising recyclability. The turnover frequency of SHBPES decreased upon grafting it onto carbon black, but it was still much better than that of Amberlyst®-15. SHBPES/CB was also tested for the Friedel–Crafts alkylation of anisole and its durability seems to be much better than that of Amberlyst®-15 under the operating conditions at 130 °C.

Graphical abstract: Sulfonic acid functionalized hyperbranched poly(ether sulfone) as a solid acid catalyst

Article information

Article type
Paper
Submitted
04 Feb 2014
Accepted
15 May 2014
First published
19 May 2014
This article is Open Access
Creative Commons BY-NC license

Green Chem., 2014,16, 3596-3602

Author version available

Sulfonic acid functionalized hyperbranched poly(ether sulfone) as a solid acid catalyst

Y. Nabae, J. Liang, X. Huang, T. Hayakawa and M. Kakimoto, Green Chem., 2014, 16, 3596 DOI: 10.1039/C4GC00188E

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