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8607210 
Journal Article 
含氰基三联苯的给体-受体甲壳型共轭聚合物的合成与性能 
Zhan, B; Wan, L; Han, R; Yi, F; Xi, B 
2020 
0 
Gaofenzi Cailiao Kexue yu Gongcheng
ISSN: 1000-7555 
Sichuan University 
36 
9 
73-80 
Chinese 
Mesogen-jacketed conjugated polymers P1 and P2 with donor-acceptor units were synthesized by introducing cyanogen acceptor groups into the terminal groups of terphenyl side chains. At the same time, in order to improve non-twisted molecular chain and increase the conjugation degree between the main chains and side chains, two mesogen-jacketed conjugated polymers P3 and P4 containing thiophene in main chain were synthesized by inserting thiophene-pi bridges between donor and acceptor units through Stille coupling reaction. 1H-NMR was used to characterize the chemical structures of the monomers and polymers, the thermal stability, optical and electrical properties of the polymers were tested. P1, P2, P3 and P4 have good thermal stability, the decomposition temperatures of polymers are all above 350℃. Because of push-pull effect caused by the donor-acceptor units in the molecular structure, the band gaps of polymers are narrow and the band gap of P4 decreases to 1.89 eV. Furthermore, the polymers have wide absorption and emission peaks in the ultraviolet-visible region, the maximum absorption peak wavelength of P3 and P4 films is 458 nm, and the maximum fluorescence emission peak wavelength of P4 film is 546 nm. This indicates that the new mesogen-jacketed conjugated polymers are potential electroluminescent materials. © 2020, Editorial Board of Polymer Materials Science & Engineering. All right reserved. 
Carbazole; Conjugated polymer; Donor-acceptor; Fluorene; Terphenyl