Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1080/00958972.2018.1527322 http://hdl.handle.net/11449/187112 |
Resumo: | A series of new cobalt(II) complexes of Schiff base derived from salicylaldehyde and different cycloalkylamines (cycloalkyl = cyclopentyl-1a, cyclohexyl-1b, and cycloheptyl-1c) was synthesized: [Co(CyPen-Salicyl) 2 ] (2a), [Co(CyHex-Salicyl) 2 ] (2b), and [Co(CyHep-Salicyl) 2 ] (2c). The bis(phenoxyiminato)Co(II) complexes (2a-2c) have been fully characterized by FTIR and UV–vis spectroscopy, elemental analysis, cyclic voltammetry, computational methods, and two of the complexes were further studied by single crystal X-ray crystallography. The X-ray structure analysis of 2a-b shows that the geometry around the metal atom is a distorted tetrahedron, confirming the spectroscopic data. Electrochemical studies suggest that the redox potential of 2a-2c are sensitive to the substituent group, decreasing in order cyclopentyl > cyclohexyl > cycloheptyl. Complexes 2a-2c were used as controlling agents for the polymerization of vinyl acetate (VAc) initiated by AIBN, according to a cobalt-mediated radical polymerization (CMRP) mechanism. The VAc polymerization mediated by 2a-2c suggests that the level of control can be slightly tuned by the substitution of the cycloalkyl group on the Schiff base ligand. Complex 2b showed the smaller discrepancy between observed and calculated molecular weight, and narrower molecular weight distribution. |
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Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexesCMRPcobalt(II) complexespolymerizationSchiff basevinyl acetateA series of new cobalt(II) complexes of Schiff base derived from salicylaldehyde and different cycloalkylamines (cycloalkyl = cyclopentyl-1a, cyclohexyl-1b, and cycloheptyl-1c) was synthesized: [Co(CyPen-Salicyl) 2 ] (2a), [Co(CyHex-Salicyl) 2 ] (2b), and [Co(CyHep-Salicyl) 2 ] (2c). The bis(phenoxyiminato)Co(II) complexes (2a-2c) have been fully characterized by FTIR and UV–vis spectroscopy, elemental analysis, cyclic voltammetry, computational methods, and two of the complexes were further studied by single crystal X-ray crystallography. The X-ray structure analysis of 2a-b shows that the geometry around the metal atom is a distorted tetrahedron, confirming the spectroscopic data. Electrochemical studies suggest that the redox potential of 2a-2c are sensitive to the substituent group, decreasing in order cyclopentyl > cyclohexyl > cycloheptyl. Complexes 2a-2c were used as controlling agents for the polymerization of vinyl acetate (VAc) initiated by AIBN, according to a cobalt-mediated radical polymerization (CMRP) mechanism. The VAc polymerization mediated by 2a-2c suggests that the level of control can be slightly tuned by the substitution of the cycloalkyl group on the Schiff base ligand. Complex 2b showed the smaller discrepancy between observed and calculated molecular weight, and narrower molecular weight distribution.Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Faculdade de Ciências e Tecnologia UNESP–Univ. Estadual PaulistaInstituto de Química de São Carlos Universidade de São PauloInstituto de Química Universidade Federal de UberlândiaDepartamento de Química Universidade Federal do Triangulo MineiroFaculdade de Ciências e Tecnologia UNESP–Univ. Estadual PaulistaFAPEMIG: 03017-16CNPq: 307443/2015-9FAPEMIG: APQ 00583-13Universidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Universidade Federal de Uberlândia (UFU)Universidade Federal do Triangulo MineiroSilva, Yan F. [UNESP]Riga, Beatriz A. [UNESP]Deflon, Victor M.Souza, Jhonathan R.Silva, Leonardo H. F.Machado, Antonio E. H.Maia, Pedro Ivo S.Valdemiro P, Carvalho-Jr [UNESP]Goi, Beatriz E. [UNESP]2019-10-06T15:25:51Z2019-10-06T15:25:51Z2018-11-17info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article3776-3789http://dx.doi.org/10.1080/00958972.2018.1527322Journal of Coordination Chemistry, v. 71, n. 22, p. 3776-3789, 2018.1029-03890095-8972http://hdl.handle.net/11449/18711210.1080/00958972.2018.15273222-s2.0-85057345974Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Coordination Chemistryinfo:eu-repo/semantics/openAccess2021-10-23T00:57:08Zoai:repositorio.unesp.br:11449/187112Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T00:57:08Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes |
title |
Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes |
spellingShingle |
Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes Silva, Yan F. [UNESP] CMRP cobalt(II) complexes polymerization Schiff base vinyl acetate |
title_short |
Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes |
title_full |
Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes |
title_fullStr |
Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes |
title_full_unstemmed |
Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes |
title_sort |
Organometallic-mediated radical polymerization using well-defined Schiff base cobalt(II) complexes |
author |
Silva, Yan F. [UNESP] |
author_facet |
Silva, Yan F. [UNESP] Riga, Beatriz A. [UNESP] Deflon, Victor M. Souza, Jhonathan R. Silva, Leonardo H. F. Machado, Antonio E. H. Maia, Pedro Ivo S. Valdemiro P, Carvalho-Jr [UNESP] Goi, Beatriz E. [UNESP] |
author_role |
author |
author2 |
Riga, Beatriz A. [UNESP] Deflon, Victor M. Souza, Jhonathan R. Silva, Leonardo H. F. Machado, Antonio E. H. Maia, Pedro Ivo S. Valdemiro P, Carvalho-Jr [UNESP] Goi, Beatriz E. [UNESP] |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) Universidade Federal de Uberlândia (UFU) Universidade Federal do Triangulo Mineiro |
dc.contributor.author.fl_str_mv |
Silva, Yan F. [UNESP] Riga, Beatriz A. [UNESP] Deflon, Victor M. Souza, Jhonathan R. Silva, Leonardo H. F. Machado, Antonio E. H. Maia, Pedro Ivo S. Valdemiro P, Carvalho-Jr [UNESP] Goi, Beatriz E. [UNESP] |
dc.subject.por.fl_str_mv |
CMRP cobalt(II) complexes polymerization Schiff base vinyl acetate |
topic |
CMRP cobalt(II) complexes polymerization Schiff base vinyl acetate |
description |
A series of new cobalt(II) complexes of Schiff base derived from salicylaldehyde and different cycloalkylamines (cycloalkyl = cyclopentyl-1a, cyclohexyl-1b, and cycloheptyl-1c) was synthesized: [Co(CyPen-Salicyl) 2 ] (2a), [Co(CyHex-Salicyl) 2 ] (2b), and [Co(CyHep-Salicyl) 2 ] (2c). The bis(phenoxyiminato)Co(II) complexes (2a-2c) have been fully characterized by FTIR and UV–vis spectroscopy, elemental analysis, cyclic voltammetry, computational methods, and two of the complexes were further studied by single crystal X-ray crystallography. The X-ray structure analysis of 2a-b shows that the geometry around the metal atom is a distorted tetrahedron, confirming the spectroscopic data. Electrochemical studies suggest that the redox potential of 2a-2c are sensitive to the substituent group, decreasing in order cyclopentyl > cyclohexyl > cycloheptyl. Complexes 2a-2c were used as controlling agents for the polymerization of vinyl acetate (VAc) initiated by AIBN, according to a cobalt-mediated radical polymerization (CMRP) mechanism. The VAc polymerization mediated by 2a-2c suggests that the level of control can be slightly tuned by the substitution of the cycloalkyl group on the Schiff base ligand. Complex 2b showed the smaller discrepancy between observed and calculated molecular weight, and narrower molecular weight distribution. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-17 2019-10-06T15:25:51Z 2019-10-06T15:25:51Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1080/00958972.2018.1527322 Journal of Coordination Chemistry, v. 71, n. 22, p. 3776-3789, 2018. 1029-0389 0095-8972 http://hdl.handle.net/11449/187112 10.1080/00958972.2018.1527322 2-s2.0-85057345974 |
url |
http://dx.doi.org/10.1080/00958972.2018.1527322 http://hdl.handle.net/11449/187112 |
identifier_str_mv |
Journal of Coordination Chemistry, v. 71, n. 22, p. 3776-3789, 2018. 1029-0389 0095-8972 10.1080/00958972.2018.1527322 2-s2.0-85057345974 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Coordination Chemistry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
3776-3789 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1797789561861963776 |