| Texto completo | |
| Autor(es): |
Bignardi, Camila
;
Oliveira, Larissa F.
;
Pesqueira, Naralyne M.
;
Riga-Rocha, Beatriz A.
;
Machado, Antonio E. H.
;
Carvalho-Jr, Valdemiro P.
;
Goi, Beatriz E.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY; v. 423, p. 9-pg., 2021-10-11. |
| Resumo | |
Three new cobalt(II) complexes with non-symmetrically-substituted N2O2 tetradentate Schiff-base ligands, prepared from the 1:1:1 condensation of 3-etoxy-salicylaldehyde, salicylaldehyde and ethylenediamine (H2Etsal 1), o-phenylenediamine (H2Phsal - 2) or 1,2-cis,trans-cyclohexyldiamine (H2Cysal - 3), were synthesized. The complexes 1-3 were characterized by UV-Vis, FTIR, and MALDI-TOF spectroscopy, elemental analysis, molar conductance, cyclic voltammetry, and computational methods. The CoII-Schiff-base complexes (1-3) were used as controlling agents for the polymerization of n-butyl acrylate (BA) photoinitiated by diphenyl(2,4,6trimethylbenzoyl)phosphine oxide (TPO), according to an organometallic-mediated radical polymerization (OMRP) mechanism. Although, all complexes have presented good control ability, the polymerization mediated by complex 1 showed the best control over molecular weight (Mn matching with Mn,th) and dispersity ((SIC) < 1.50). Kinetic results and computational investigations support the activation/deactivation equilibrium, exerted by complexes 1-3, occurring by one face of the complexes via reversible termination (RT) mechanism.minim. (AU) | |
| Processo FAPESP: | 18/06340-1 - Complexos bimetálicos de rutênio(II) e níquel(II): acoplamento de reações mecanisticamente incompatíveis usando catalisadores multifuncionais via catálise tandem |
| Beneficiário: | Valdemiro Pereira de Carvalho Júnior |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/19395-9 - Síntese de novos complexos organometálicos de Fe(III), Co(III) e Ni(III) coordenados a bases de Schiff assimétricas para mediar a foto-OMRP |
| Beneficiário: | Beatriz Eleutério Goi Carvalho |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |