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Title: Pure blue-light emissive poly(oligofluorenes) with bifunctional POSS in the main chain
Authors: Chi, H.
Lim, S.L.
Wang, F.
Wang, X.
He, C. 
Chin, W.S. 
Keywords: nanocomposites
polyhedral oligomeric silsesquioxanes
pure blue light
Issue Date: 2014
Citation: Chi, H., Lim, S.L., Wang, F., Wang, X., He, C., Chin, W.S. (2014). Pure blue-light emissive poly(oligofluorenes) with bifunctional POSS in the main chain. Macromolecular Rapid Communications 35 (8) : 801-806. ScholarBank@NUS Repository.
Abstract: 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. Schematic illustration of the pearl-necklace-like hybrid polymer structure contains repeated POSS and oligofluorenes units in the polymer backbone. For convenience, R is used to represent octyl chain of the oligofluorenes. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Source Title: Macromolecular Rapid Communications
ISSN: 15213927
DOI: 10.1002/marc.201400006
Appears in Collections:Staff Publications

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