Oxidized and reduced oligo(2,5-di-(-2-thienyl)-furan): solubilities and related properties

Insoluble films of oxidized oligo(2,5-di-(-2-thienyl)-furan) [oligo(SOS)] were synthesized on Pt from a 5 mM monomer and 0.2 M LiClO4 + acetonitrile + 0.25% (v/v) water solution at 0.4 mA cm−2. Insoluble films of reduced oligo(SOS) were farther obtained by reduction in the background electrolyte at 0 V vs. Ag/AgCl. The solubilities of both forms in several solvents were determined. Dimer, trimer, tetramer and pentamer present in solution were detected by mass spectroscopy-fast atom bombardment. The band diagrams for the electronic transitions of both states were established from UV-Vis spectra of their saturated solutions.