Dendrimeric silanes for formation of metallosilicates

New heterogeneous catalysts for the epoxidation of alkenes with tert-butylhydroperoxide

David Juwiler, Ronny Neumann

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

New metallosilicate catalysts were prepared by reacting a silanol capped dendrimer, Si[CH2CH2Si(CH3)2OH]4 with MCp2Cl2 (M = TiIV, MoVI, WVI and VV). The resulting Si[CH2CH2Si(CH3)2OMCp 2Cl]4 compounds were incorporated in a silica matrix by the sol-gel method. The catalytic activity of the metallosilicates after calcination revealed excellent activity and selectivity towards epoxidation of alkenes with tert-butylhydroperoxide. Maximum activity was observed with molybdenum-containing materials. Analysis of the catalytic activity revealed that the catalysts were truly heterogeneous.

Original languageEnglish
Pages (from-to)241-243
Number of pages3
JournalCatalysis Letters
Volume72
Issue number3-4
DOIs
Publication statusPublished - Apr 2001

Fingerprint

tert-Butylhydroperoxide
Silanes
epoxidation
Epoxidation
Alkenes
silanes
alkenes
Olefins
catalytic activity
Catalyst activity
Dendrimers
catalysts
Catalysts
Molybdenum
dendrimers
Silicon Dioxide
Calcination
roasting
Sol-gel process
molybdenum

Keywords

  • Dendrimer
  • Epoxidation
  • Metallosilicate

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

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AU - Neumann, Ronny

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AB - New metallosilicate catalysts were prepared by reacting a silanol capped dendrimer, Si[CH2CH2Si(CH3)2OH]4 with MCp2Cl2 (M = TiIV, MoVI, WVI and VV). The resulting Si[CH2CH2Si(CH3)2OMCp 2Cl]4 compounds were incorporated in a silica matrix by the sol-gel method. The catalytic activity of the metallosilicates after calcination revealed excellent activity and selectivity towards epoxidation of alkenes with tert-butylhydroperoxide. Maximum activity was observed with molybdenum-containing materials. Analysis of the catalytic activity revealed that the catalysts were truly heterogeneous.

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