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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Synthesis, characterization and catalytic application of a new organometallic oligomer based on polyhedral oligomeric silsesquioxane

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Autor(es):
Vieira, Eduardo Guimaraes [1] ; Silva, Rafael Oliveira [1] ; Furlani Junior, Enes [2] ; Dias Filho, Newton Luiz [1, 3]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista, UNESP, Dept Fis & Quim, Av Brasil, 56 Centro, Caixa Postal 31, BR-15385000 Ilha Solteira, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Fac Engn, Dept Fitotecnia Tecnol Alimentos Socio Econ, Campus Ilha Solteira, Ilha Solteira, SP - Brazil
[3] Univ Extremo Sul Catarinense, Av Univ, 1105, CP 3167, BR-88806000 Criciuma, SC - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Applied Organometallic Chemistry; v. 31, n. 10 OCT 2017.
Citações Web of Science: 2
Resumo

Although homogeneous catalysts provide high performance and selectivity, the difficulty of separation and recycling of these catalysts has bothered the scientific community worldwide. Therefore, the demand for heterogeneous catalysts that possess the advantages of homogeneous ones, with ease of separation and recyclability remains a topic of major impact. The oligomeric catalyst synthesized in this work was characterized using elemental analysis, Fourier transform infrared, C-13 NMR, Si-29 NMR and energy-dispersive X-ray spectroscopies, X-ray diffraction, thermo-gravimetric analysis, scanning electron microscopy and Brunauer-Emmett-Teller analysis and compared to its homogeneous counterpart {[}W(CO)(3)Br-2(ATC)] in the epoxidation of 1-octene, cyclooctene, (S)-limonene, cis-3-hexen-1-ol, trans-3hexen-1-ol and styrene. The results showed that the percentage conversion for the homogeneous species {[}W(CO)(3)Br-2(ATC)] was slightly higher than for the oligomeric catalyst (POSS-ATC-{[}W(CO)(3)Br-2]). Furthermore, the selectivity for epoxide of the oligomeric catalyst was greater than that of the homogeneous catalyst by about 25% when (S)-limonene was used. Great conversions (yields) of products were obtained with a wide range of substrates and the catalyst was recycled many times without any substantial loss of its catalytic activity. (AU)

Processo FAPESP: 13/24602-0 - Síntese e caracterização de oligômeros poliédricos de silsesquioxanos e suas aplicações em processos de adsorção e catálise
Beneficiário:Newton Luiz Dias Filho
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 14/05566-5 - Estudo das reações de imobilização de complexos organometálicos de tungstênio e molibdênio em oligômeros poliédricos de silsesquioxanos para aplicação em catálise
Beneficiário:Eduardo Guimarães Vieira
Linha de fomento: Bolsas no Brasil - Doutorado