| Texto completo | |
| Autor(es): |
Kawakami, Manami
;
Schulz, Karl H. G.
;
Varni, Anthony J.
;
Tormena, Claudio F.
;
Gil, Roberto R.
;
Noonan, Kevin J. T.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Polymer Chemistry; v. 13, n. 37, p. 9-pg., 2022-08-09. |
| Resumo | |
Herein, we demonstrate that homopolymerization and statistical copolymerization of 2-ethylhexyl thiophene-3-carboxylate and 2-ethylhexyl selenophene-3-carboxylate monomers is possible via Suzuki-Miyaura cross-coupling. A commercially available palladium catalyst ([1,3-bis(2,6-di-3-pentylphenyl)imidazol-2-ylidene](3-chloropyridyl)dichloropalladium(ii) or PEPPSI-IPent) was employed to prepare regioregular conjugated polymers with high molecular weights (similar to 20-30 kg mol(-1)), and relatively narrow molecular weight distributions. The optical bandgap in the copolymer series could be reduced by increasing the concentration of selenophene-3-carboxylate in the material. Configurational triads were observed in the H-1 NMR spectra of the statistical copolymers, which were assigned using a combination of 2D NMR techniques. The use of a H-1-Se-77 HSQC spectrum to further examine sequence distribution in the statistical copolymers revealed how Se-77 NMR can be used as a tool to examine the microstructure of Se-containing conjugated polymers. (AU) | |
| Processo FAPESP: | 20/10246-0 - Ressonância magnética nuclear: das sequências de pulso a determinação estrutural |
| Beneficiário: | Claudio Francisco Tormena |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |