Original Article

Subject Category: Polymer Synthesis and Reactions

Polymer Journal (2010) 42, 363–367; doi:10.1038/pj.2010.13; published online 17 March 2010

Polymer reaction of poly(p-phenylene–ethynylene) by addition of decaborane: modulation of luminescence and heat resistance

Kenta Kokado1 and Yoshiki Chujo1

1Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan

Correspondence: Dr Y Chujo, Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto, Nishikyo-ku 615-8510, Japan. E-mail: chujo@chujo.synchem.kyoto-u.ac.jp

Received 13 October 2009; Revised 27 January 2010; Accepted 28 January 2010; Published online 17 March 2010.

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Abstract

Polymer reactions of poly(p-phenylene–ethynylene) (PPE) based on the addition reaction of decaborane to the carbon–carbon triple bond were successfully carried out. The platform polymer was synthesized through Sonogashira–Hagihara coupling polymerization. The effective introduction of the boron cluster, and thus the subsequent formation of o-carborane, was supported by 1H and 11B nuclear magnetic resonance spectroscopies. The introduction rate of decaborane to the polymer main chain was proportional to the feed ratio of decaborane. Ultraviolet-visible absorption and photoluminescence studies illustrate the shortening of the effective π-conjugation length caused by the introduction of carborane clusters. Furthermore, the introduction of the boron cluster by the polymer reaction efficiently enhanced the heat resistance of PPE.