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Synthesis and Properties of Alternating Fluorene‐Based Oligomers for Sub‐µm Photopatterning
Author(s) -
Scheler Esther,
Betthausen Eva,
Strohriegl Peter
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000165
Subject(s) - oligomer , fluorene , monomer , polymer chemistry , materials science , copolymer , fluorescence , suzuki reaction , proton nmr , polymer , photochemistry , chemistry , organic chemistry , composite material , optics , catalysis , physics , palladium
The synthesis of alternating photo‐crosslinkable fluorene co‐oligomers via Suzuki cross coupling is reported. The co‐oligomers were characterized using NMR and GPC, the results showing effective control of molecular weight. The oligomers have low T g s of 53–63 °C and are thermally stable up to ≈300 °C. Using TPD as co‐monomer, a blue‐emitting oligomer was obtained, a yellow‐fluorescent material for benzothiadiazole, and a red (film) and yellow‐green (solution) emitting material for bithiophene. The energy levels are very similar to those of randomly linked oligomers. The photo‐crosslinking behavior was studied and under optimized conditions a lateral resolution of 600 nm was obtained.