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De‐mixing of Polyfluorene‐Based Blends by Contact with Acetone: Electro‐ and Photo‐luminescence Probes
Author(s) -
Morgado J.,
Moons E.,
Friend R. H.,
Cacialli F.
Publication year - 2001
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200106)13:11<810::aid-adma810>3.0.co;2-c
Subject(s) - polyfluorene , luminescence , materials science , polymer , nanometre , acetone , solvent , macromolecule , polymer blend , mixing (physics) , spectroscopy , photochemistry , chemical engineering , nanotechnology , chemical physics , optoelectronics , composite material , organic chemistry , copolymer , chemistry , biochemistry , physics , quantum mechanics , engineering
Phase separation of polyfluorene‐based polymer blends is studied via photo‐ and electro‐luminescence. By looking at Förster energy transfer, the authors prove that luminescence spectroscopy is a sensitive probe of the polymer environment, with a resolution of a few nanometers, which is advantageous over atomic force microscopy when the interpretation of the latter is complicated by a rich surface structure. De‐mixing of the blends is found to occur upon exposure to a very poor solvent (acetone), and is attributed to enhanced segmental and chain dynamics of the macromolecular chains.