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  • Organic Solvent-Free Olefins and Alcohols (ep)oxidation Using Recoverable Catalysts Based on [PM12O40]3- (M = Mo or W) Ionically Grafted on Amino Functionalized Silica Nanobeads.

Organic Solvent-Free Olefins and Alcohols (ep)oxidation Using Recoverable Catalysts Based on [PM12O40]3- (M = Mo or W) Ionically Grafted on Amino Functionalized Silica Nanobeads.

Materials (Basel, Switzerland) (2019-10-12)
Yun Wang, Florence Gayet, Pascal Guillo, Dominique Agustin
ABSTRACT

Catalyzed organic solvent-free (ep)oxidation were achieved using H3PM12O40 (M = Mo or W) complexes ionically grafted on APTES-functionalized nano-silica beads obtained from straightforward method (APTES = aminopropyltriethoxysilane). Those catalysts have been extensively analyzed through morphological studies (Dynamic Light Scattering (DLS), TEM) and several spectroscopic qualitative (IR, multinuclear solid-state NMR) and quantitative (1H and 31P solution NMR) methods. Interesting catalytic results were obtained for the epoxidation of cyclooctene, cyclohexene, limonene and oxidation of cyclohexanol with a lower [POM]/olefin ratio. The catalysts were found to be recyclable and reused during three runs with similar catalytic performances.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Cyclooctene oxide, 99%
Sigma-Aldrich
4-Ethylmorpholine, ≥97.0% (GC)
Sigma-Aldrich
2-Cyclohexen-1-ol, 95%
Sigma-Aldrich
tert-Butyl hydroperoxide solution, 70 wt. % in H2O
Sigma-Aldrich
cis-1,2-Cyclohexanediol, 99%
Sigma-Aldrich
Cyclohexene, inhibitor-free, ReagentPlus®, 99%
Sigma-Aldrich
cis-Cyclooctene, contains 100-200 ppm Irganox 1076 FD as antioxidant, 95%
Sigma-Aldrich
Cyclohexanol, ReagentPlus®, 99%
Sigma-Aldrich
Cyclohexene oxide, 98%