Cationic oligothiophenes have played a key role in the study of conduction mechanism of p-doped polythiophene and radical cations of oligothiophenes, which were made persistent with appropriate substituents, have been shown to undergo self-association, so-called p-dimer formation, in the condensed phase. We designed and synthesized series of oligothiophenes annelated with bicyclo[2.2.2]octene units to investigate the driving forces of p-dimerization and the structure�property relationships of the p-dimers of oligothiophene radical cations. Combined with the results of DFT calculations, SOMO�SOMO interaction was found to be the most important factor affecting p-dimerization enthalpy when comparing oligothiophenes with the same chain length. By applying this finding, we are trying to construct redox-responsible oligothiophene-networks based on the p-dimer formation and some results will also be presented.

??Self-association and its steric control of cationic oligothiophenes??

246th National Meeting (2013)

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