Brito Elisa Barbosa de, Santos Daniela Corrêa, Paula Taihana Parente de, Morais Andreia de, Freitas Jilian Nei de, Marques Maria de Fátima Vieira, Monteiro Sergio Neves
Center for Information Technology Renato Archer, (CTI Renato Archer), Rodovia D. Pedro I, Km 143, 6, Campinas 13069-901, SP, Brazil.
Instituto de Macromoleculas Professora Eloisa Mano, IMA, Universidade Federal do Rio de Janeiro, IMA-UFRJ, Av. Horacio Macedo 2030, Rio de Janeiro 21941-598, RJ, Brazil.
Polymers (Basel). 2024 Dec 30;17(1):72. doi: 10.3390/polym17010072.
Conjugated donor-acceptor (D-A) copolymers are widely used in optoelectronic devices due to their influence on the resulting properties. This study focuses on the synthesis and characterization of the conjugated D-A copolymer constructed with fluorene and di-2-thienyl-2,1,3-benzothiadiazole units, resulting in Poly[2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4,7-di(2-thienyl)-2,1,3-benzothiadiazole)] (PFDTBT). The synthesis associated with reaction times of 48 and 24 h, the latter incorporating the phase-transfer catalyst Aliquat 336, was investigated. The modified conditions produced copolymers with higher molar masses (Mw > 20,000 g/mol), improved thermal stability and red emission at 649 nm. Furthermore, the resulting D-A copolymers exhibited uniform morphology with low surface roughness (P2-Ra: 0.77 nm). These improved properties highlight the potential of D-A copolymers based on PFDTBT for various optoelectronic applications, including photovoltaics, light-emitting devices, transistors and biological markers in the form of quantum dots.
共轭供体-受体（D-A）共聚物因其对所得性能的影响而广泛应用于光电器件中。本研究聚焦于由芴和二-2-噻吩基-2,1,3-苯并噻二唑单元构建的共轭D-A共聚物的合成与表征，得到了聚[2,7-(9,9-二辛基-芴)-alt-5,5-(4,7-二(2-噻吩基)-2,1,3-苯并噻二唑)]（PFDTBT）。研究了反应时间为48小时和24小时的合成过程，后者加入了相转移催化剂Aliquat 336。改进后的条件制备出了具有更高摩尔质量（Mw > 20,000 g/mol）、更好的热稳定性以及在649 nm处发红光的共聚物。此外，所得的D-A共聚物呈现出均匀的形态，表面粗糙度较低（P2-Ra：0.77 nm）。这些改进的性能突出了基于PFDTBT的D-A共聚物在各种光电子应用中的潜力，包括光伏、发光器件、晶体管以及量子点形式的生物标记物。
