• 文献标题:   An amphiphilic graphene oxide-based triphase catalyst for highly efficient synthesis of benzyl esters
  • 文献类型:   Article
  • 作  者:   XUE B, LIANG XY, LIU N, XU TC, XU J, LI YX
  • 作者关键词:   graphene oxide, pyridinebased ionic liquid, graft, triphase catalyst, benzyl ester
  • 出版物名称:   COLLOIDS SURFACES APHYSICOCHEMICAL ENGINEERING ASPECTS
  • ISSN:   0927-7757 EI 1873-4359
  • 通讯作者地址:   Changzhou Univ
  • 被引频次:   3
  • DOI:   10.1016/j.colsurfa.2017.11.053
  • 出版年:   2018

▎ 摘  要

In this study, graphene oxide-grafted pyridine-based ionic liquids were prepared and used as novel and highly efficient triphase catalysts for the synthesis of benzyl esters by the nucleophilic substitution reaction of benzyl halide with carboxylic acid salt. The as-prepared catalysts were characterized through several technologies including Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, elemental analysis, atomic force microscopy and thermal gravimetric analysis. The catalysts showed excellent catalytic performances in the synthesis of benzyl esters by the above-mentioned reaction. High conversion of benzyl halide (99%) and selectivity of benzyl ester (97%) were obtained after 6 h at 120 degrees C over the catalysts. Furthermore, the as-prepared triphase catalysts could be easily recovered and reused at least five times without significant loss of catalytic activity. The amphiphilicity of graphene oxide played an important role in the transfer of carboxylic anions from the aqueous phase to the organic phase, which accelerated the nucleophilic substitution reaction of benzyl halide with carboxylic acid salt.