Cyanated Diazatetracene Diimides with Ultrahigh Electron Affinity for n‑Channel Field Effect Transistors.

Several diazatetracene diimides with high electron affinity (up to 4.66 eV!) were prepared and well characterized. The LUMO energy level of these electron-deficient molecules was found to be closely related to their material stability. Compound 7 with ultrahigh electron affinity suffered from reduction and hydrolysis in the presence of silica gel or water. The stable compounds 3 and 6 showed n-channel FET behavior with an average electron mobility of 0.002 and 0.005 cm2 V–1 s–1, respectively, using a solution processing method. [ABSTRACT FROM AUTHOR]