Environmental friendly and highly regioselective oxybromination in an aqueous system using SBA-15 supported sulfated zirconia catalyst

Ai Jan Chen, Xiao Rong Chen, Chung Yuan Mou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Brominated aromatic compounds have been widely used in synthetic organic chemistry for the manufacturing of many bulk and fine chemicals. In contrast to direct bromination by toxic elemental bromine or HBr, we developed a safe system for oxybromination using hydrogen peroxide and ammonium bromide in the aqueous phase under mild temperature and near neutral conditions over a SBA-15 supported sulfated zirconia (SZ) catalyst. The ready availability of the catalyst and the nearly neutral aqueous solution are the salutary features of this approach. Bromination of aromatics with electron-withdrawing group took place readily, and bromoproducts were produced in moderate to excellent yields. A good to excellent para-selectivity was observed. The SZ/SBA-15 catalyst may be re-used several times without substantial loss of activity. We also studied the catalytic activity of SZ which were supported on mesoporous SBA-15 silica or mesoporous SZ. On bromination silica supported sulfated zirconia (SZ/SBA-15) showed much better catalytic ability for bromination then self-supported SZ (m-SZ). Furthermore, we found the catalytic activity of SZ decreased as the calcinations temperature increased. The good catalytic performance of the SZ/SBA-15 materials was attributed to the well dispersed of sulfate groups to give sulfated silica-zirconia of with (1) very good redox property and (2) high strength and high density of acid sites.

Original languageEnglish
Title of host publicationCatalytic Materials for Energy, Green Processes and Nanotechnology
Number of pages6
Publication statusPublished - 2010
Externally publishedYes
Event2009 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 30 2009Dec 3 2009

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Conference2009 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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