Journal
APPLIED CATALYSIS A-GENERAL
Volume 382, Issue 1, Pages 90-98Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2010.04.029
Keywords
Heterogeneous catalytic oxidation; NaY zeolite; Sn(salen)Cl-2; Immobilization; Baeyer-Villiger oxidation
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Funding
- Ministry of Environment and Forests, Government of India [19-5/2005-RE]
- Department of Science and Technology (DST), Government of India
- CSIR
- Yokohama City University, Japan [W18016]
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The [Sn(salen)](2+) complex moiety has been immobilized into NaY zeolite by in situ synthesis of the salen complex in NaY matrix to prepare a new catalyst, Sn(salen)-NaY. The catalyst has been characterized by UV-vis, infrared (IR) spectroscopy, X-ray powder diffraction. Mossbauer and Sn-119 NMR spectroscopy. The catalyst shows impressive catalytic performance (with high selectivity) in Baeyer-Villiger oxidation of various cyclic ketones including 2-adamantanone, cyclohexanone, cyclopentanone, 4-methylcyclohexanone, 2-methylcyclohexanone using tert-butyl hydroperoxide (tert-BuOOH) as an oxidant. The yield of epsilon-caprolactone from catalytic oxidation of cyclohexanone over Sn(salen)-NaY catalyst was ca. 75%. The catalyst can be recycled for several times without any major decline in catalytic activity. (C) 2010 Elsevier B.V. All rights reserved.
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