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J Am Chem Soc. 2011 Jul 6;133(26):9949-51. doi: 10.1021/ja201485p. Epub 2011 Jun 14.

High-performance electron-transporting polymers derived from a heteroaryl bis(trifluoroborate).

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  • 1Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.


In this communication, we report that dipotassium aryl bis(trifluoroborate)s make stable and easy-to-purify yet reactive monomers under Suzuki polycondensation reactions. A bis(trifluoroborate) of 2-alkylbenzotriazole was prepared successfully and copolymerized with dibromobenzothiadiazole in the presence of a Pd catalyst and LiOH, yielding high molecular weight conjugated polymers. This polymer (P1) composed of all electron-accepting units shows excellent electron-transport properties (μ(e) = 0.02 cm(2) V(-1) s(-1)), which proves the value of the aryl bis(trifluoroborate) monomers and suggests that many other types of semiconducting polymers that could not be accessed previously can be synthesized using this approach.

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