Synthesis, Structures, and Properties of Thieno[3,2-b]thiophene and Dithiophene Bridged Isoindigo Derivatives and Their Organic Field-effect Transistors Performance

Organic semiconductors (ITTI and IDTI) characterized of thieno[3,2-b]thiophene and dithiophene bridged isoindigo derivatives were designed and successfully synthesized. H-1-C-13 HMBC, (HH)-H-1-H-1 nuclear Overhauser enhancement spectroscopy (NOESY) spectra, and H-1 nuclear Overhauser enhancement (NOE) experiments were employed to determine the configurations of the synthesized molecules, indicating they belong to stable Z,Z configurations. Organic field-effect transistors based on ITTI and IDTI through a solution processed method have good air stabilities and exhibit hole mobilities of 0.045 and 0.075 cm(2) V-1 s(-1) after high-temperature annealing in air, respectively.