Palladium-catalyzed carbonylative annulation toward new [1,2,5]thiadiazole-fused heteroacenes for solution-processed field-effect transistors

The practical synthesis of [1,2,5]thiadiazole-fused heteroacenes with soluble side-chains via Pd-catalyzed carbonylative annulation protocol was developed. Physicochemical investigation of obtained heteroacenes revealed their potential as organic semiconductors. Preliminarily, solution-processed FET devices based on FTC8 exhibited a promising mobility up to 0.177 cm2/(Vs) with a current on/off ratio of nearly 1.2 × 105 under an ambient atmosphere.