title: Self-assembly and semiconductivity of an oligothiophene supergelator.
abstract: A bis(trialkoxybenzamide)-functionalized quaterthiophene derivative was synthesized and its self-assembly properties in solution were studied. In non-polar solvents such as cyclohexane, this quaterthiophene π-system formed fibril aggregates with an H-type molecular arrangement due to synergistic effect of hydrogen bonding and π-stacking. The self-assembled fibres were found to gelate numerous organic solvents of diverse polarity. The charge transport ability of such elongated fibres of quaterthiophene π-system was explored by the pulse radiolysis time resolved microwave conductivity (PR-TRMC) technique and moderate mobility values were obtained. Furthermore, initial AFM and UV-vis spectroscopic studies of a mixture of our electron-rich quaterthiophene derivative with the electron acceptor [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM) revealed a nanoscale segregated assembly of the individual building blocks in the blend.
authors.affiliation: Universität Würzburg, Institut für Organische Chemie, 97074 Würzburg, Germany.
authors.forename: Pampa
authors.initials: P
authors.lastname: Pratihar
authors.forename: Suhrit
authors.initials: S
authors.lastname: Ghosh
authors.forename: Vladimir
authors.initials: V
authors.lastname: Stepanenko
authors.forename: Sameer
authors.initials: S
authors.lastname: Patwardhan
authors.forename: Ferdinand C
authors.initials: FC
authors.lastname: Grozema
authors.forename: Laurens D A
authors.initials: LD
authors.lastname: Siebbeles
authors.forename: Frank
authors.initials: F
authors.lastname: Würthner