Detail publikace

Manganeseth(II) Schiff-base-mediated reversible deactivation controlled radical polymerization of vinyl acetate

HASHIMOTO, P. OLIVEIRA, L. RIGA-ROCHA, B. MACHADO, A. SANTANA, V. NASCIMENTO, O. CARVALHO, V. GOI, B.

Originální název

Manganeseth(II) Schiff-base-mediated reversible deactivation controlled radical polymerization of vinyl acetate

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

A series of new manganese(II) complexes were prepared with three bidentate Schiff-base ligands derived by condensation of salicylaldehyde and different cycloalkylamines (cycloalkyl = cyclopentyl, cyclohenfl, and cycloheptyl): [Mn(CyPen-Salicyl)(2)] (1), [Mn(CyHex-Salicyl)(2)] (2), and [Mn(CyHep-Salicyl)(2)] (3). The complexes 1-3 were characterized by FTIR, UV-vis and EPR spectroscopy, elemental analysis, cyclic voltammetry, and computational methods. The manganese(u) complexes (1-3) were used as controlling agents for the polymerization of vinyl acetate (VAc) initiated by AIBN according to an organometallic-mediated radical polymerization (OMRP) mechanism. The VAc polymerization mediated by the Mn complexes suggests that the control level can be slightly tuned through substitution of the cycloalkyl group on the Schiff-base ligand. Kinetics studies and computational investigations support an RT mechanism and a tailorable Mn complex reactivity mainly altered by steric factors of the Schiff-base ligands. The calculated thermodynamic parameters agree with the mediating ability of these complexes, since the degree of polymerization control decreases with increasing steric hindrance of the Schiff-base ligands, as well as with increasing AG values for the formation of dormant species.

Klíčová slova

COMPLEXES; CMRP

Autoři

HASHIMOTO, P.; OLIVEIRA, L.; RIGA-ROCHA, B.; MACHADO, A.; SANTANA, V.; NASCIMENTO, O.; CARVALHO, V.; GOI, B.

Vydáno

14. 6. 2021

Nakladatel

ROYAL SOC CHEMISTRY

Místo

CAMBRIDGE

ISSN

1369-9261

Periodikum

New Journal of Chemistry

Ročník

45

Číslo

22

Stát

Spojené království Velké Británie a Severního Irska

Strany od

10109

Strany do

10117

Strany počet

9

URL

https://pubs.rsc.org/en/content/articlelanding/2021/NJ/D1NJ00493J#!divAbstract

BibTex

@article{BUT171696,
  author="Patricia K. {Hashimoto} and Larissa F. {Oliveira} and Beatriz A. {Riga-Rocha} and Antonio E.H. {Machado} and Vinicius Tadeu {Santana} and Otaciro R. {Nascimento} and Valdemiro P. {Carvalho} and Beatriz E. {Goi}",
  title="Manganeseth(II) Schiff-base-mediated reversible deactivation controlled radical polymerization of vinyl acetate",
  journal="New Journal of Chemistry",
  year="2021",
  volume="45",
  number="22",
  pages="10109--10117",
  doi="10.1039/d1nj00493j",
  issn="1369-9261",
  url="https://pubs.rsc.org/en/content/articlelanding/2021/NJ/D1NJ00493J#!divAbstract"
}