Abstract
New transition metal substituted silicate xerogels, ML(n) -SiO2, have been prepared by the sol-gel technique and have been used as heterogeneous catalysts for the side-chain oxidation of alkyl arches with anhydrous t- butylhydroperoxide. The cobalt substituted silicates were the most active and selective, for example, ethylbenzene was cleanly oxidized to acetophenone at 65% conversion and > 99% selectivity. The metal salt precursor used was a key factor in determining the activity of the metallosilicate. Diffuse reflectance UV-vis and IR measurements indicated that when using Co(OSV)2 as metal precursor, the acetate group was detached from the metal and Co(II) was tetrahedral and site substituted in the silicate network. Addition of the oxidant led to stabilization of a Co(III) oxidation state and/or retention of the tetrahedral configuration.
| Original language | English |
|---|---|
| Pages (from-to) | 315-318 |
| Number of pages | 4 |
| Journal | Journal of Molecular Catalysis A: Chemical |
| Volume | 138 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - Feb 5 1999 |
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Keywords
- Alkyl arenes
- Catalytic oxidation
- Metallosilicates
- Peroxide
- Side-chain oxidation
ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
Cite this
Silicate xerogels containing cobalt as heterogeneous catalysts for the side-chain oxidation of alkyl aromatic compounds with tert-butyl hydroperoxide. / Rogovin, Marina; Neumann, Ronny.
In: Journal of Molecular Catalysis A: Chemical, Vol. 138, No. 2-3, 05.02.1999, p. 315-318.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Silicate xerogels containing cobalt as heterogeneous catalysts for the side-chain oxidation of alkyl aromatic compounds with tert-butyl hydroperoxide
AU - Rogovin, Marina
AU - Neumann, Ronny
PY - 1999/2/5
Y1 - 1999/2/5
N2 - New transition metal substituted silicate xerogels, ML(n) -SiO2, have been prepared by the sol-gel technique and have been used as heterogeneous catalysts for the side-chain oxidation of alkyl arches with anhydrous t- butylhydroperoxide. The cobalt substituted silicates were the most active and selective, for example, ethylbenzene was cleanly oxidized to acetophenone at 65% conversion and > 99% selectivity. The metal salt precursor used was a key factor in determining the activity of the metallosilicate. Diffuse reflectance UV-vis and IR measurements indicated that when using Co(OSV)2 as metal precursor, the acetate group was detached from the metal and Co(II) was tetrahedral and site substituted in the silicate network. Addition of the oxidant led to stabilization of a Co(III) oxidation state and/or retention of the tetrahedral configuration.
AB - New transition metal substituted silicate xerogels, ML(n) -SiO2, have been prepared by the sol-gel technique and have been used as heterogeneous catalysts for the side-chain oxidation of alkyl arches with anhydrous t- butylhydroperoxide. The cobalt substituted silicates were the most active and selective, for example, ethylbenzene was cleanly oxidized to acetophenone at 65% conversion and > 99% selectivity. The metal salt precursor used was a key factor in determining the activity of the metallosilicate. Diffuse reflectance UV-vis and IR measurements indicated that when using Co(OSV)2 as metal precursor, the acetate group was detached from the metal and Co(II) was tetrahedral and site substituted in the silicate network. Addition of the oxidant led to stabilization of a Co(III) oxidation state and/or retention of the tetrahedral configuration.
KW - Alkyl arenes
KW - Catalytic oxidation
KW - Metallosilicates
KW - Peroxide
KW - Side-chain oxidation
UR - http://www.scopus.com/inward/record.url?scp=0033524672&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033524672&partnerID=8YFLogxK
U2 - 10.1016/S1381-1169(98)00207-6
DO - 10.1016/S1381-1169(98)00207-6
M3 - Article
VL - 138
SP - 315
EP - 318
JO - Journal of Molecular Catalysis A: Chemical
JF - Journal of Molecular Catalysis A: Chemical
SN - 1381-1169
IS - 2-3
ER -