A 2D condensed benzothiophene derivative TBTDBT was synthesized. The thermal, optical and electrochemical properties were investigated. The single crystalline microribbons were grown by solution drop-casting and physical vapor transport methods respectively. The field effect transistors based on TBTDBT microribbons were fabricated and a mobility up to 2.62 cm(2) V(-1) s(-1) and an on-off ratio greater than 10(5) could be achieved.

A novel starphene containing sulfur exhibits an excellent FET performance with a mobility of 0.56 cm2 V−1 s−1 based on the single-crystal nanowires.

Three new heteropentacene derivatives based on bis(benzothieno)silole were synthesized. The XRD characterization reveals that the crystal structures of the heteropentacenes can be significantly influenced by the methyl substitution. The optical and electrochemical properties were investigated and the experimental results confirm that the silole motif lowers the LUMO level of the heteropentacenes. Preliminary resultsshow that the insertion of silole ring systems into rigid heteropentacenes leads to an improved solubility and high fluorescence quantum yield up to 0.74 in solution, which indicates the potential of these new silolecontaining compounds for photonic and photoelectric applications. The strong and sensitive fluorescence quenching behavior towards picric acid (PA) demonstrates that the silole-containing heteropentacene derivatives are also promising fluorescent sensor materials for detecting the nitro-containing explosives.Scheme 1 Synthesis of BBTS derivatives.