Novel synthetic precursor of functionalized highly oligothiophenes

摘要

The development of structurally well-defined #alpha# -oligothiophenes with dimension comparable to the present limit of nano-patterning techniques (approx 10 nm gap regime) is of crucial importance to investigate electronic conduction through linear #pi# -conjugated molecules. In many cases, the chain extension of #pi# -conjugated oligomers up to this size and the chemical modifications of the obtained highly ologomers have been hampered by solubility problems. We recently developed a synthetic approach to functionalized oligothiophenes using the N-silyl-protected 3,4-diaminothiophene as a key unit (Scheme 1). Here we report a novel synthetic precursor of various functionalized approx 10nmlong ologothiophenes based on this tactics.