Alternating copolyfluorenevinyles with polynuclear aromatic moieties: Synthesis,photophysics, and electroluminescence |
| |
| Authors: | John A. Mikroyannidis Larysa Fenenko Masayuki Yahiro Chihaya Adachi |
| |
| Affiliation: | 1. Chemical Technology Laboratory, Department of Chemistry, University of Patras, GR‐26500 Patras, GreeceChemical Technology Laboratory, Department of Chemistry, University of Patras, GR‐26500 Patras, Greece;2. V. E. Lashkaryov Institute of Semiconductor Physics of NASU, 45 Pr. Nauky, 03028 Kyiv, Ukraine;3. Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka 819‐0395, Japan |
| |
| Abstract: | Three new copolymers, namely poly(fluorenevinylene‐alt‐naphthalenevinylene) ( N ), poly(fluorenevinylene‐alt‐anthracenevinylene) ( A ) and poly(fluorenevinylene‐alt‐pyrenevinylene) ( P ), were synthesized by Heck coupling of 9,9‐dihexyl‐2, 7‐divinylfluorene with a polynuclear aromatic dibromide. The 9,10‐disubstituted anthracene was obtained exclusively for A while N and P were obtained as a mixture of two isomers with predominant the 1,4‐disubstituted naphthalene and 1,8‐disubstituted pyrene, respectively. The polymers were soluble in common organic solvents and decomposed above 370 °C. Their glass transition temperature increased from 58 to 110 °C by increasing the number of the phenyl rings of the polynuclear aromatic moiety. Rather high‐efficiency blue and blue‐greenish photoluminescence (PL) of these copolymers in solution was largely decreased in their films, indicating the presence of concentration quenching in the solid state. The OLED using these polymers demonstrated green EL in the case of copolymers N and A , and red EL in the P derivative with ηEL = 0.26–0.31%. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 4661–4670, 2007 |
| |
| Keywords: | anthracene conjugated polymers electroluminescence Heck coupling light‐emitting diodes (LED) naphthalene photophysics poly(fluorenevinylene)s pyrene synthesis |
|
|
