Cross-linked chitosan aerogel modified with Au: Synthesis, characterization and catalytic application

Sajjad Keshipour; Seyyedeh Sahra Mirmasoudi

doi:10.1016/j.carbpol.2018.05.068

Cross-linked chitosan aerogel modified with Au: Synthesis, characterization and catalytic application

Carbohydr Polym. 2018 Sep 15:196:494-500. doi: 10.1016/j.carbpol.2018.05.068. Epub 2018 May 24.

Authors

Sajjad Keshipour¹, Seyyedeh Sahra Mirmasoudi²

Affiliations

¹ Department of Nanochemistry, Nanotechnology Research Center, Urmia University, G. C. P. O. Box 165-5715944931, Urmia, Iran. Electronic address: s_keshipour@sbu.ac.ir.
² Department of Nanochemistry, Nanotechnology Research Center, Urmia University, G. C. P. O. Box 165-5715944931, Urmia, Iran.

PMID: 29891323
DOI: 10.1016/j.carbpol.2018.05.068

Abstract

Dimercaprol as the chelating agent of Au(III) was loaded on chitosan aerogel. Dimercaprol supported on chitosan aerogel efficiently was complexed with Au(III). The new organometallic compound showed good catalytic activity in the oxidation reaction of some aliphatic alcohols, benzyl alcohol, and ethylbenzene. High conversions and excellent selectivities were obtained in the solvent-free oxidation reactions under mild reaction conditions. Also, turnover numbers were calculated for the oxidation reactions with 203, 134, 308, 282, 392, and 153 for 1-pentanol, 1-octanol, 2-propanol, 2-butanol, benzyl alcohol, and ethylbenzene, respectively. The organometallic compound is applicable as a heterogeneous Au(III) catalyst with high chemical stabilityand recyclability up to 6 times.

Keywords: Chitosan aerogel; Dimercaprol; Gold; Heterogeneous catalysis; Oxidation.