Publication detail

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.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

COMPLEXES; CMRP

Authors

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

Released

14. 6. 2021

Publisher

ROYAL SOC CHEMISTRY

Location

CAMBRIDGE

ISBN

1369-9261

Periodical

New Journal of Chemistry

Year of study

45

Number

22

State

United Kingdom of Great Britain and Northern Ireland

Pages from

10109

Pages to

10117

Pages count

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"
}