Electron-Accepting π‑Conjugated Molecules with Fluorine-Containing Dicyanovinylidene as Terminal Groups: Synthesis, Properties, and Semiconducting Characteristics

A series of electron-accepting
π-conjugated molecules having
fluorine-containing dicyanovinylidene as terminal groups has been
synthesized for the application to electron-transporting semiconductors.
This terminal group can be easily incorporated into π-conjugated
frameworks. Electrochemical measurements indicated that these compounds
showed low-lying lowest unoccupied molecular orbital energy levels,
which could be fine-tuned by the combination of central unit. The
thin films fabricated by solution process showed typical electron-transporting
characteristics in field-effect transistors.