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Pure Blue‐Light Emissive Poly(oligofluorenes) with Bifunctional POSS in the Main Chain
Author(s) -
Chi Hong,
Lim Siew Lay,
Wang Fuke,
Wang Xizu,
He Chaobin,
Chin Wee Shong
Publication year - 2014
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201400006
Subject(s) - electroluminescence , bifunctional , materials science , bathochromic shift , photoluminescence , polymer , conjugated system , glass transition , hydrosilylation , stacking , magenta , condensation polymer , photochemistry , polymer chemistry , chemical engineering , optoelectronics , nanotechnology , fluorescence , organic chemistry , chemistry , layer (electronics) , composite material , optics , inkwell , physics , engineering , catalysis
Emission of conjugated polymers is known to undergo bathochromic shift from solution to film formation due to π–π stacking in the solid state. In this report, a series of pearl‐necklace‐like hybrid polymers is designed via the hydrosilylation condensation between bifunctional polyhedral oligomeric silsesquioxanes ( B‐POSS ) and oligofluorene segments. Optoelectronic analyses unequivocally show that the presence of these interconnecting B‐POSS can effectively reduce red‐shift in photoluminescence and electroluminescence during film formation. These hybrid poly(oligofluorenes) display stable blue emission with high color purity. Thermal analyses also indicate that they are vitrified polymers with high glass transition temperature (up to 125 °C). We believe that this strategy can be extended to other conjugated systems to control color purity in electroactive materials and holds promise as new emissive materials for various applications.