Tetrathiafulvalene (TTF)-Functionalized Thiophene Copolymerized with 3,3鈥?Didodecylquaterthiophene: Synthesis, TTF Trapping Activity, and Response to Trinitrotoluene

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• 作者：Jasmine Sinha ; Stephen J. Lee ; Hoyoul Kong ; Thomas W. Swift ; Howard E. Katz
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：February 12, 2013
• 年：2013
• 卷：46
• 期：3
• 页码：708-717
• 全文大小：529K
• 年卷期：v.46,no.3(February 12, 2013)
• ISSN：1520-5835

文摘

We report a synthesis route to a thiophene polymer where the repeat unit consists of 3,3鈥?didodecylquaterthiophene (as in PQT12) plus an additional thiophene ring from which other functional groups may be projected. The hydroxymethyl form of this polymer, while only a poor semiconductor in its own right, serves as a vehicle for compatibilizing PQT12 itself with arbitrary functional groups. In this article, we focus on tetrathiafulvalene (TTF) as the functionality. As expected, the TTF group acts as a hole trap, as shown by loss of hole mobility and a surprising negative Seebeck coefficient, but this enables a current-increase response to trinitrotoluene as an analyte and confirms a similar observation we recently reported for a dissolved TTF. Added dopants also fill the trap states, restoring hole mobility and the typical positive Seebeck coefficient.