Atom-transfer radical homo- and copolymerization of carbazole-substituted styrene and perfluorostyrene. (5th July 2020)

• Record Type: Journal Article
• Authors: Vaitusionak, Aliaksei A.; Vasilenko, Irina V.; Sych, Galyna; Kashina, Anna V.; Simokaitiene, Jurate; Grazulevicius, Juozas V.; Kostjuk, Sergei V.
• Is Part Of: European polymer journal. Volume 134(2020)
• Publication Date: 2020-07-05
• Subjects: Atom-transfer radical polymerization -- Copolymerization -- Carbazole-containing monomers and polymers -- Random copolymers -- Star-shaped polymers; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2020.109843
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Highlights: ATRP of 9-(4-vinylphenyl)carbazole and 9-(2, 3, 5, 6-tetrafluoro-4-vinylphenyl)carbazole. Linear and star-shaped (co)polymers with controlled Mn up to 30, 000 Da were obtained. All (co)polymers are characterized by high thermal stability. Photoluminescence quantum yield was found to be 20% for random copolymer. Abstract: Atom-transfer radical polymerization of 9-(4-vinylphenyl)carbazole (M1 ) and 9-(2, 3, 5, 6-tetrafluoro-4-vinylphenyl)carbazole (M2 ) has been investigated using CuCl/N, N, N′, N′′, N′′-pentamethyldiethylenetriamine as catalyst and ethyl 2-bromoisobutyrate as an initiator. The polymerization of the monomers proceeded in a living fashion affording polymers with controlled molecular weight (Mn = 5000 g mol −1 to 32000 g mol −1 ) and relatively low polydispersity (Đ = 1.2–1.5). The kinetic investigations showed that M2 polymerized at the faster rate as compared to M1 . Block copolymers were successfully prepared starting from the polymerization of more reactive M2 followed by addition of M1 . The same initiating system also induced living radical copolymerization of these monomers giving random copolymers. Usage of tetrafunctional initiator pentaerythritol tetrakis(2-bromoisobutyrate) in conjunction with CuCl/N, N, N′, N′′, N′′-pentamethyldiethylenetriamine as catalyst allowed to synthesize star-shaped linear and random copolymers from M1 and M2 with controlled molecular weight (up to Mn = 25000 g mol −1 ) and low polydispersity (Đ < 1.5). The thermal, photophysical and electrochemical properties of the synthesized linear and star-shaped polymers and copolymers were estimated. It was shown that photophysical properties of copolymers can be tuned by changing the copolymer composition.