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|Title:||Poly(naphthylenethiophene)s and poly(naphthylenevinylenephenylenevinylene) s: Effect of naphthalene positional isomers on the light emitting properties of their polymers|
|Citation:||Zhou, C.-Z., Wang, W.-L., Lin, K.K., Chen, Z.-K., Lai, Y.-H. (2004-03). Poly(naphthylenethiophene)s and poly(naphthylenevinylenephenylenevinylene) s: Effect of naphthalene positional isomers on the light emitting properties of their polymers. Polymer 45 (7) : 2271-2279. ScholarBank@NUS Repository. https://doi.org/10.1016/j.polymer.2004.01.050|
|Abstract:||Poly(naphthylenethiophene)s and poly(naphthylenevinylene-phenylenevinylene) s prepared from 1,5-dibromo-3,7-di-t-butylnaphthalene showed a significant blue shift in their UV-vis and photoluminescence spectra compared to copolymers derived from the 1,4-naphthylene system, both in solution and in thin film. This is correlated to a change in conjugation effect of the two positional isomers of naphthalene in the polymer backbone, where in 1,4-conjugation an aromatic sextet remains intact in one of the naphthalene rings whereas 1,5-conjugation involves the loss of resonance energy in the entire naphthalene unit. The series of poly(naphthylenevinylene-phenylvinylene)s emitted blue-green light with very high fluorescence quantum yields (80-95%) in solution. A fabricated device showed external quantum efficiency estimated at 0.2-0.4%, with a relatively high turn-on voltage at ∼7.0 V. © 2004 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Staff Publications|
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