Synthesis and Properties of Carbazole-containing Copolymers from Bis[3-(4-fluorobenzoyl)carbazole] Methane

Abstract A novel difluoride containing carbazole groups was designed. Two series of polycarbazoles based on the novel monomer were synthesized via C-N coupling reactions with either 4,4′-biphenol or bisphenol A. Copolymers were obtained with 4,4′-difluorobenzophenone or bis(4-fluorophenyl) sulfone as comonomer. The solubilities of the poly(carbazole ketones)s were poor, but the poly(carbazaole sulfones)s all dissolved in NMP, DMSO and DMAC. Tough films of poly(carbazole sulfones)s could be easily cast from NMP solutions. The viscosities of poly(carbazole sulfones)s were 0.72 ∼ 0.90 dL/g. The Tgs of polymers ranged from 162.4°C to 258.9°C. The temperatures of 5% wt loss ranged from 460°C to 509°C. UV-Vis absorptions and blue light emissions properties are also presented. Keywords: Carbazolecopolymerizationfluorescencepolycarbazolepolycondensationpoly(ether sulfones)poly(ether ketones)UV-Vis absorption Acknowledgments This work was supported by the Natural Sciences and Engineering Research Council of Canada and the China High-Tech Development 863 Program (Grant No.: 2007AA03Z217), Guangdong Province Sci. and Tech Bureau (Key Strategic Project Grant No.: 2003C105004, 2006A10704004, 2006B12401006), and Guangzhou Sci. and Tech Bureau (2005U13D2031).