Autor(es)

Libero, Laura O. ; Ribeiro, Lara K. ; Granone, Luis I. ; Churio, Maria S. ; Souza, Josiane C. ; Mastelaro, Valmor R. ; Andres, Juan ; Longo, Elson ; Mascaro, Lucia H. ; Assis, Marcelo

• Tipo de documento: Artigo Científico
• Fonte: CHEMCATCHEM; v. N/A, p. 11-pg., 2023-04-24.

Resumo

This work reports how the immobilization of Fe-2(MoO4)(3) in chitosan films affects the oxidation reaction of sulfide derivatives to sulfates in the dark, resulting in good yields and excellent selectivity. As demonstrated, a variety of substituted sulfides were tolerated even in the presence of oxidativesensitive functional groups, leading to a regioselective application of the catalyst under mild reaction conditions and guaranteeing its reuse for at least 6 cycles without losing its catalytic performance. Specifically, films containing 1 mg of Fe-2(MoO4)(3) per ml of chitosan showed a yield and selectivity of 99%. The key success of the selective oxidation was associated with the presence of the hydroxyl radical, center dot OH, and the Fe3+/Fe2+ Fenton-like process. As a proof of concept, the selective oxidation of sulfides to the corresponding sulfones was performed to demonstrate the synergistic effect between Fe-2(MoO4)(3) and chitosan. This work offers a design strategy for efficient catalysts that may extend to other semiconductors and oxidation processes. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs