Ruthenium-nickel heterobimetallic complex as a bifunctional catalyst for ROMP of norbornene and ethylene polymerization

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Federal de Uberlândia (UFU)-
Autor(es): dc.contributorCEP 91501-970-
Autor(es): dc.creatorMasson, Gustavo H. C. [UNESP]-
Autor(es): dc.creatorCruz, Thaís R. [UNESP]-
Autor(es): dc.creatorGois, Patrik D. S. [UNESP]-
Autor(es): dc.creatorMartins, Daniele M.-
Autor(es): dc.creatorLima-Neto, Benedito S.-
Autor(es): dc.creatorOliveira, Guedmiller S.-
Autor(es): dc.creatorMachado, Antonio E. H.-
Autor(es): dc.creatorBernardo-Gusmão, Katia-
Autor(es): dc.creatorGoi, Beatriz E. [UNESP]-
Autor(es): dc.creatorCarvalho-Jr, Valdemiro P. [UNESP]-
Data de aceite: dc.date.accessioned2022-08-04T22:10:13Z-
Data de disponibilização: dc.date.available2022-08-04T22:10:13Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2021-07-14-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1039/d1nj01498f-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/221903-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/221903-
Descrição: dc.descriptionMonometallic [RuCl2(η6-p-cymene)(pipNH2)] (mono-Ru) and heterobimetallic [RuCl2(η6-p-cymene)][(μ-Schiff-pip)Ni(PPh3)Cl] (Ru-Ni) complexes were successfully synthesized. They were fully characterized by FTIR, UV-Vis, and NMR spectroscopic studies, elemental analysis, cyclic voltammetry and computational studies. ComplexRu-Niwas additionally characterized by MALDI-TOF mass spectrometry. The polynorbornene (polyNBE) synthesesviaROMP usingmono-RuandRu-Nias pre-catalysts in the presence of ethyl diazoacetate (EDA) were evaluated at different [EDA]/[Ru] ratios, time periods (5-60 min) and temperatures (25 and 50 °C). Higher yields of polyNBE were obtained using [NBE]/[Ru] = 5000 and 5 μL of EDA at 50 °C for 60 min. Under these conditions,mono-Ruexhibited higher catalytic activity thanRu-Ni, reaching 50 and 40% yield, respectively. Hence, a strong steric influence ofRu-Nion the catalytic activity was demonstrated. The order of magnitude of 105g mol−1was measured by SEC forMnandĐvalues ranging from 1.64 to 3.70 formono-Ruand from 1.26 to 2.40 forRu-Ni. The catalytic activity ofRu-Nion ethylene polymerization was evaluated at different [Al]/[Ni] ratios, temperatures (20-60 °C) and reaction times (3-12 h) using MAO as the co-catalyst.Ru-Niwas able to provide an activity of 71.40 kg PE (mol Ni)−1h−1at 40 °C after 3 h in a [Al]/[Ni] molar ratio of 2100, 7 μmol of catalyst in 25 mL of toluene and 116 psi ethylene pressure.-
Descrição: dc.descriptionFaculdade de Ciências e Tecnologia UNESP-Univ. Estadual Paulista CEP 19060-900 Presidente Prudente-
Descrição: dc.descriptionInstituto de Química de São Carlos Universidade de São Paulo CEP 13560-970-
Descrição: dc.descriptionInstituto de Química Universidade Federal de Uberlândia P.O. Box 593 CEP 38400-089-
Descrição: dc.descriptionInstituto de Química Universidade Federal do Rio Grande do Sul P.O. Box 15003 CEP 91501-970-
Descrição: dc.descriptionFaculdade de Ciências e Tecnologia UNESP-Univ. Estadual Paulista CEP 19060-900 Presidente Prudente-
Formato: dc.format11466-11473-
Idioma: dc.languageen-
Relação: dc.relationNew Journal of Chemistry-
???dc.source???: dc.sourceScopus-
Título: dc.titleRuthenium-nickel heterobimetallic complex as a bifunctional catalyst for ROMP of norbornene and ethylene polymerization-
Tipo de arquivo: dc.typelivro digital-
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