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Photo- and electroluminescent properties of a π-conjugated copolymer containing 2,2′-bipyridyl units

Deichmann, Vitor Angelo Fonseca
Çırpan, Ali
KARASZ, Frank E.
The synthesis, structural characteristics, and photo- and electroluminescent properties of a soluble light-emitting copolymer built up of regularly alternating segments of 1,4-dihexyloxybenzene and 2,2'-bipyridyl (PBPyDHB) are described and discussed. Optical properties of the polymer were investigated in solution and solid-state conditions, demonstrating that in film form the predominant emission centers are inter-macromolecular aggregates, either in photo- or electroluminescence. Thermogravimetric analysis indicates that PBPyDHB has very high thermal stability, with a maximum decomposition rate around 400 degrees C and onset with 10% mass loss at 342 degrees C. The polymer is a blue emitter, and the good solubility, thermal behavior, and electroluminescence properties make it a promising material for electro-optical applications. (c) 2006 Society of Chemical Industry.