Abstract
trans-Stilbene oxide have been synthesized under liquid phase reaction conditions using trans-stilbene in the presence of different oxidants and different solvents over synthesized and characterized Zr-Mn-MCM-41 and Mn-MCM-41 as catalysts. On increasing the Si/(Zr + Mn) ratios of Zr-Mn-MCM-41 and Si/Mn ratios of Mn-MCM-41 catalysts from 49 to 327 and 15 to 102, respectively, the conversion of trans-stilbene, yield and selectivity of trans-stilbene oxide decreased. This may be due to the number of Lewis acid sites in Zr-Mn-MCM-41 and Mn-MCM-41 are found to decrease almost linearly with increasing ratios of Si/(Zr + Mn) and Si/Mn, respectively. Both the Zr-Mn-MCM-41(49) and Mn-MCM-41(31) possesses stronger affinity with trans-stilbene and TBHP, but, the conversion of trans-stilbene, yield and selectivity of trans-stilbene oxide decreased in only recyclable Mn-MCM-41. This may be due to decreasing the catalytic activity on the surface of catalysts. In the context, the Si/(Zr + Mn) ratio of 49 is found to be more suitable for the epoxidation of trans-stilbene to highly selective synthesis of trans-stilbene oxide. Thus the yield (76.3%) and selectivity of trans-stilbene oxide (84.58%) are higher in Zr-Mn-MCM-41(49) than that in other Zr-Mn-MCM-41 and Mn-MCM-41 catalysts.
| Original language | English |
|---|---|
| Pages (from-to) | 261-268 |
| Number of pages | 8 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 79 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 2005 Apr 1 |
Bibliographical note
Funding Information:The authors gratefully acknowledge the Korea Research Foundation for sponsoring this work (KRF-2003-005-D00002).
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials