Energy transfer in polystyrene containing pendant stilbene chromophores

Abstract

Four different styrene copolymers with stilbenoid side chains were synthesised under Williamson ether or Wadsworth–Emmons conditions. Blends of these graft copolymers with 4,4′‐bis[2,2‐bis(4‐methoxyphenyl)ethenyl]biphenyl (TMBiPPT), a good blue light emitting oligomer, yielded efficient host–guest systems with only emission from the oligomer. TMBiPPT has a maximum absorption at 365 nm, and the emission spectra of the synthesised graft copolymers all had a significant spectral overlap with the absorption spectrum of TMBiPPT. Since we can tune both the structures of the graft copolymer and the oligomer, this is very promising for obtaining new materials to use in a single‐layer OLED (organic light emitting diode). Copyright © 2003 Society of Chemical Industry

Pd‐mediated polymerization of diazoacetates with aromatic ester group: Synthesis and photophysical property of poly(1‐pyrenylmethoxycarbonylmethylene)

“…In particular, polymerization of aryl and arylmethyl diazoacetates would be of great interest, because the resulting polymers have closely located aromatic rings around the polymer main chain, where the interaction between the conjugated π‐electrons could lead to characteristic photophysical properties. In fact, vinyl polymer counterparts bearing a variety of chromophores have been investigated for such optoelectronic applications as light‐harvesting,5 energy transfer,6 and photoconductivity 7. Among various aromatic groups, pyrene is particularly important because of its ability to form excimer, which exhibits strong emission at different wavelength from that of its monomer emission in the fluorescence spectrum and whose formation is highly dependent on the steric relationship between the pyrenes 8.…”

Electronic energy transfer in pendant MEH-PPV polymers

“…Synthesis of these polymers, with a known confined MEH-PPV conjugation length, should enable control over spectral tunability and allow a closer investigation of interchromophore interactions including energy transfer processes. While there have been a few reports of the synthesis of specific confined conjugation length polymers, [16][17][18][19] our strategy is to sequentially control conjugation length and study the effects on the polymer photophysics.…”