Synthesis and complete NMR spectral assignment of thiophene-substituted sulfinyl monomers

Abstract

This paper describes the synthesis of thiophene-substituted sulfinyl monomers. It comprises a four-step reaction by which the thiophene unit is built in via Suzuki coupling. These monomers could be used as building blocks for the preparation of conducting polymers via a new concept: the sulfinyl precursor route i.e. via thiophene substituted poly(p-phenylenevinylene) precursors. Furthermore, the complete H-1 and C-13 NMR signal assignment is presented. In addition to being essential for the characterization of the polymers concerned, it offers useful input information for further improvement of chemical shift prediction software. Furthermore, the T-1C relaxation. decay times are demonstrated to have the potential of being a fast and robust criterion for the spectral assignment of analogous monomers.