Synthesis and properties of fluorene‐based fluorinated polymers

Abstract

Fluorene‐based polymers containing various fluorinated benzene (fluorobenzene, p‐difluorobenzene, and tetrafluorobenzene) moieties were synthesized. In addition, perfluorooctylation of poly‐[(9,9‐dioctylfluorene‐2,7‐diyl)‐co‐(fluorene‐2,7‐diyl)] was carried out to afford fluorene‐based polymers with perfluorooctyl moiety at the 9‐position on the fluorene ring. To evaluate the effect of fluorine moiety, polymers containing nonfluorinated benzene moieties and nonfluorinated octyl groups were synthesized. The photoluminescence measurements indicated that all these polymers exhibited blue emission in solution, but a polymer containing a perfluorooctyl group did not emit in the film state. Polymers containing various fluorinated benzene moieties showed higher fluorescence quantum yields and thermal stability than those containing nonfluorinated benzene. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 39: 3143–3150, 2001

Macrostructural order and optical properties of polyfluorene-based polymer films

“…15 P(HF-alt-OF) (M n ¼5800, M w ¼18300, M w /M n ¼3.16) was synthesized using the procedure reported previously (Scheme 1). 13,14 The PL spectra of POF, P(HF-alt-OF) and P(FF-alt-OF) in chloroform solutions showed emission peaks at 416, 422 and 409 nm, respectively ( Figure 1, solid line).…”

“…[13][14][15] PMMA was synthesized by radical polymerization of methylmethacrylate with azobis (isobutyronitrile) in toluene.…”

Dispositivos poliméricos eletroluminescentes

“…Essa classe de polímeros, alguns dos quais estão mostrados na Figura 2, tem despertado o interesse dos estudiosos por suas propriedades elétricas e ópticas com potencial aplicação para fabricação de dispositivos emissores de luz (LEDs) [22][23][24][25][26][27][28][29][30][31][32][33] . Estes polímeros apresentam algumas propriedades interessantes para essa finalidade destacando-se, entre elas, grande estabilidade química, térmica e oxidativa 18,[34][35][36][37][38] ; alto rendimento quântico de fluorescência tanto em solução quanto no estado sólido 37,[39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] ; possibilidade de formarem materiais líquido-cristalinos 46,[58][59][60][61][62][63][64]…”

Development of Synthetic Method for ^|^pi;-Conjugated Polymers via Direct Arylation Polycondensation

“…The molecular weight achieved with the optimized protocol is higher than that of the corresponding polymer prepared by polycondensation via the Suzuki Miyaura coupling (M n 3,200). 11 This difference in the M n may be associated with the high stability of the C H bond against degradation during the direct arylation polycondensation reaction. The optimal conditions were also applicable to the reaction of octa uorobiphenyl instead of tetra uorobenzene (Scheme 3).…”