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- W2022751230 abstract "The preparation, characterization, and application in oxidation reactions of new biomimetic catalysts are reported. Brazilian São Simão kaolinite clay has been functionalized with [meso-tetrakis(pentafluorophenyl)porphinato]iron(III), Fe(TPFPP). To obtain the functionalized clay, the natural clay was purified by dispersion−sedimentation, expanded by insertion of dimethyl sulfoxide (DMSO), and functionalized with amino groups by substitution of DMSO with ethanolamine. These previous steps allowed clay functionalization with Fe(TPFPP), leading to a layered material with a basal spacing of 10.73 Å. Clay functionalization with the porphyrin was confirmed by formation of the secondary amine, as demonstrated by FTIR bands at 3500−3700 cm−1. UV−vis spectroscopy revealed a red shift in the Soret band of the iron porphyrin in the functionalized material as compared to the parent iron porphyrin catalyst in solution, indicating FeIIIP → FeIIP reduction. The catalytic performance of the functionalized clay was evaluated in the epoxidation of cyclooctene, with complete selectivity for the epoxide (100% epoxide yield), and ketonization of cyclohexane, cyclohexanone being the major product. The novel catalyst was also evaluated in the Baeyer−Villiger (BV) oxidation of cyclohexanone, with 85% conversion of cyclohexanone in ε-caprolactone, with total selectivity to ε-caprolactone." @default.
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- W2022751230 date "2009-11-04" @default.
- W2022751230 modified "2023-10-03" @default.
- W2022751230 title "Porphyrin−Kaolinite as Efficient Catalyst for Oxidation Reactions" @default.
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- W2022751230 doi "https://doi.org/10.1021/am900556b" @default.
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