Journal
MOLECULES
Volume 26, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/molecules26185435
Keywords
manganese complexes; iron complexes; oxidation; epoxidation; functionalized silica beads; H2O2; replacement of volatile reagent
Funding
- Region Languedoc Roussillon Midi-Pyrenees (Region Occitanie)
- IUT A Paul Sabatier
- Syndicat Mixte de la Communaute d'Agglomeration Castres-Mazamet [15066786]
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In this study, Mn and Fe BPMEN complexes exhibited excellent reactivity in catalytic oxidation reactions, with volatile acetic acid being replaced by SiO2@COOH particles and evaluated for performance. SiO2@COOH beads were prepared by functionalizing SiO2, leading to a 100-fold reduction in molar ratio, and were utilized as catalysts in oxidation reactions of various substrates.
Mn and Fe BPMEN complexes showed excellent reactivity in catalytic oxidation with an excess of co-reagent (CH3COOH). In the straight line of a cleaner catalytic system, volatile acetic acid was replaced by SiO2 (nano)particles with two different sizes to which pending carboxylic functions were added (SiO2@COOH). The SiO2@COOH beads were obtained by the functionalization of SiO2 with pending nitrile functions (SiO2@CN) followed by CN hydrolysis. All complexes and silica beads were characterized by NMR, infrared, DLS, TEM, X-ray diffraction. The replacement of CH3COOH by SiO2@COOH (100 times less on molar ratio) has been evaluated for (ep)oxidation on several substrates (cyclooctene, cyclohexene, cyclohexanol) and discussed in terms of activity and green metrics.
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