Synthesis and electropolymerization of hexadecyl functionalized bithiophene and thieno[3,2-b]thiophene end-capped with EDOT and EDTT units

Greg J. McEntee, Peter J. Skabara, Filipe Vilela, Steven Tierney, Ifor D. W. Samuel, Salvatore Gambino, Simon J. Coles, Michael B. Hursthouse, Ross W. Harrington, William Clegg

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Abstract

The synthesis of three novel thiophene-based conjugated molecules (1-3) is presented. We report the electronic and redox properties of these compounds along with the corresponding electrochemically prepared polymers. The structures of compounds 1 and 2 have been confirmed by single-crystal X-ray diffraction studies. Non-covalent S…O interactions in 1 act to hold the molecule in a planar conformation and this is in stark contrast to the twisted nature of the 3,4-ethylenedithiothiophene (EDTT) analogue. The degree of planarity within the molecules dictates the effective conjugation length within the materials and also the packing of the molecules in the solid state. CGL-TOF studies give hole mobilities up to 4 × 10-5 cm2 V-1 s-1 for compound 1 and 1.5 × 10-5 cm2 V-1 s-1 for 2.
Original languageEnglish
Pages (from-to)3000-3008
Number of pages8
JournalJournal of Materials Chemistry
Volume22
Issue number9
Early online date2 Apr 2010
DOIs
Publication statusPublished - 11 May 2010

Keywords

  • synthesis
  • electropolymerization
  • hexadecyl functionalized bithiophene
  • materials chemistry

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