Highly efficient heterogeneous catalysts for phenol oxidation: Binuclear pyrrolyl-azine metal complexes encapsulated in NaY zeolite

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Magalhaes, AL (Autor) FCUP; Iwona Biernacka (Autor) Outra; Manuela Raposo (Autor) Outra; Rosa Baptista (Autor) Outra; Pier Parpot (Autor) Outra; Krzysztof Biernacki (Autor) Outra; Antonio Fonseca (Autor) Outra; Isabel Neves (Autor) Outra

Revista

Título: Microporous and Mesoporous Materials

Vol. 227

Páginas: 272-280

ISSN: 1387-1811

Editora: Elsevier

Indexação

ISI Web of Knowledge - 19 Citações

Scopus - 25 Citações

Outras Informações

ID Authenticus: P-00K-BT3

DOI: 10.1016/j.micromeso.2016.03.003

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9