Insulated molecular wire with highly conductive pi-conjugated polymer core

Journal of the American Chemical Society
Jun TeraoShu Seki

Abstract

We have recently developed a new method for synthesizing polyrotaxanes with a high covering ratio, rigidity, photoluminescence efficiency, and solubility in a variety of organic solvents through the polymerization of structurally defined rotaxane monomers. The rigid rodlike structure of the pi-conjugated core polymers in these polyrotaxanes is thought to facilitate the effective transport of charge carriers. Here we applied this method to the synthesis of a polyrotaxane having a poly(phenylene ethynylene) backbone by the Sonogashira copolymerization of a structurally defined rotaxane with a linker molecule. According to time-resolved microwave conductivity and transient absorption spectroscopy measurements, the hole mobility along the pi-conjugated polymer chain of the polyrotaxane thus formed was extremely high and comparable to that in amorphous silicon.

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Citations

Jun 12, 2010·Journal of the American Chemical Society·Seelam PrasanthkumarAyyappanpillai Ajayaghosh
Oct 1, 2010·Journal of the American Chemical Society·Kazunori SugiyasuMasayuki Takeuchi
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Jul 16, 2011·The Journal of Physical Chemistry. a·Hidenori Nakayama, Shunsaku Kimura
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Sep 8, 2011·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Jun Terao
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