Synthesis of Pyrrole-Based Poly(arylenevinylene)s via Co-Catalyzed Hydroarylation of Alkynes.
Macromol Rapid Commun
; 42(16): e2100283, 2021 Aug.
Article
em En
| MEDLINE
| ID: mdl-34142404
ABSTRACT
Polyaddition via the Co-catalyzed hydroarylation of 1-(2-pyrimidinyl)pyrrole with aromatic diynes affords poly(arylenevinylene)s under mild conditions. This reaction avoids production of stoichiometric amounts of by-products. Although structural analysis of the obtained polymers reveals the presence of 1,1-vinylidene unit, switching the counter anion of the Co catalyst and steric hindrance of the diyne monomers improves the regioselectivity of the polymers. When a catalyst with bulky counter anions is used for the reaction of less hindered diyne monomers, 1,2-vinylene linkages are formed dominantly over 1,1-vinylidene linkages (937). The effect of the regioselectivity of the polymer on the optical and semiconducting properties is also evaluated.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Pirróis
/
Alcinos
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article