Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 227, Issue -, Pages 272-280Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2016.03.003
Keywords
NaY zeolite; Pyrrolyl-azine derivatives; Encapsulation; Phenol oxidation; DFT
Categories
Funding
- Programa Operacional Regional do Norte (ON.2)
- FCT
- FEDER (European Fund for Regional Development)-COMPETE-QREN-EU
- FEDER through the Operational Programme for Competitiveness Factors COMPETE
- National Funds through FCT - Foundation for Science and Technology [PEST-C/EQB/LA0006/2013/37285]
- project n-STeP - Nanostructured systems for Tail [NORTE-07-0124-FEDER-000039]
- Fundação para a Ciência e a Tecnologia [PEst-C/QUI/UI0686/2013] Funding Source: FCT
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Phenol was successfully oxidized by the heterogeneous catalysts based on iron(II) or copper(II) pyrrolylazine complexes encapsulated into NaY zeolite, under mild conditions. The heterogeneous catalysts were prepared using two different methods and characterized by different spectroscopic techniques and chemical analysis. The pyrrolyl-azine complexes are formed with a metal/ligand molar ratio of 2:1. Their structures were further confirmed by OFF calculations. The catalytic experimental conditions (e.g., amount of catalyst, presence or absence of the oxidant, PhOH:tBuOOH molar ratio) were optimized. The presence of the encapsulated metal pyrrolyl-azine complexes in NaY zeolite enhances higher conversion of phenol to catechol. The catalytic activities of the encapsulated metal complexes in NaY zeolite were compared with the homogeneous counterpart, and the catalysts were easily recovered and reused. (C) 2016 Elsevier Inc. All rights reserved.
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