Development of Insulated Oligothiophene Molecular Wires Containing Cyclopenta[c]thiophene Derivatives

Abstract

Oligothiophenes containing dioxocyclopenta[c]thiophene bearing bulky bis(di-t-butylphenyl) groups , or cyclopenta[c]thiophene bearing sterically compact fluorene moiety were designed and synthesized towards insulated molecular wires to investigate single-molecule conductance. The photophysical and electrochemical properties as well as the encapsulation effect of these oligomers were investigated. The measurement of the single-molecule conductance was carried out using modified STM techniques.