| Full text | |
| Author(s): |
Oliveira, Larissa F.
[1]
;
Bignardi, Camila
[1]
;
Pesqueira, Naralyne M.
[1]
;
Riga-Rocha, Beatriz A.
[1]
;
Machado, Antonio E. H.
[2]
;
Carvalho-Jr, Valdemiro P.
;
Goi, Beatriz E.
[3]
Total Authors: 7
|
| Affiliation: | [1] UNESP Univ Estadual Paulista, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP - Brazil
[2] Univ Fed Uberlandia, Inst Quim, POB 593, BR-38400089 Uberlandia, MG - Brazil
[3] Carvalho-Jr, Jr., Valdemiro P., UNESP Univ Estadual Paulista, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | EUROPEAN POLYMER JOURNAL; v. 159, OCT 5 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
In this study, we synthesized the complex {[}Co(BuSalen)] using the novel tetradentate BuSalen ligand and analyzed its ability as a controlling agent for the photo-induced organometallic-mediated radical polymerization (photo-OMRP) of butyl acrylate (BA) using diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) as photo initiator. BA polymerization with {[}Co(BuSalen)] reached significant control levels using the {[}BA]/{[}Co-II]/TPO molar ratio of 600/1/1. The {[}Co(Salen)] and {[}Co(Bu(2)Salen)] complexes were also obtained following literature methods aiming a comparison in the mediating ability in photo-OMRP. {[}Co(BuSalen)] and {[}Co(Bu(2)Salen)] showed better controlling ability, as observed in the copolymerization study (D= 2.64, 1.50, and 1.26 for complexes {[}Co(Salen)], {[}Co(BuSalen)] and {[}Co(Bu(2)Salen)], respectively). Kinetics studies and computational investigations support a reversible termination (RT) mechanism and a tailorable Co-II complex reactivity mainly altered by Schiff-base steric factors. Calculated thermodynamic parameters agree with the controlling degree delivered by these complexes, since the polymerization control increases with increasing the Delta G values for the formation of dormant species. (AU) | |
| FAPESP's process: | 18/06340-1 - Bimetallic complexes of ruthenium(II) and nickel(II): coupling of mechanistically-incompatible reactions using multifunctional catalysts via tandem catalysis |
| Grantee: | Valdemiro Pereira de Carvalho Júnior |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 19/03354-4 - New organometallic complexes Co (III) coordinated to asymmetric schiff bases to mediate photo-OMRP |
| Grantee: | Larissa Fazioni de Oliveira |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 18/19395-9 - Synthesis of new organometallic complexes of Fe (III), Co (III) and Ni (III) coordinated to asymmetric Schiff bases to mediate photo-OMRP |
| Grantee: | Beatriz Eleutério Goi Carvalho |
| Support Opportunities: | Regular Research Grants |