Chalcogenopheno[3,2-]pyrrole-Containing Donor-Acceptor-Donor Organic Semiconducting Small Molecules for Organic Field-Effect Transistors.

A group of chalcogenopheno[3,2-]pyrroles, including thieno[3,2-]pyrrole (TP), furo[3,2-]pyrrole (FP), and selenopheno[3,2-]pyrrole (SeP), and thieno[3,2-]thiophene (TT) electron-donating units were coupled with a thiophene-flanked diketopyrrolo[3,4-]pyrrole (ThDPP) acceptor to generate four donor-acceptor-donor (D-A-D) semiconducting small molecules (, , , and ). This study systematically investigated the differences between chalcogenopheno[3,2-]pyrroles and TT. From the characterizations, chalcogenopheno[3,2-]pyrrole-containing molecules showed lower band gaps and binding-energy cold crystallization behavior.

Regioselective Direct C-H Bond Heteroarylation of Thiazoles Enabled by an Iminopyridine-Based α-Diimine Nickel(II) Complex Evaluated by DFT Studies.

Direct C-H bond arylation is a highly effective method for synthesizing arylated heteroaromatics. This method reduces the number of synthetic steps and minimizes the formation of impurities. We report an air- and moisture-stable iminopyridine-based α-diimine nickel(II) complex for direct C5-H bond arylation of thiazole derivatives.

Improved Self-Assembly of P3HT with Pyrene-Functionalized Methacrylates.

A block copolymer with discotic liquid crystalline behavior was synthesized using Grignard metathesis polymerization (GRIM) and initiators for continuous activator regeneration atom transfer radical polymerization (ICAR-ATRP). A novel discotic liquid crystalline mesogen, 6-(pyren-1-yloxy)hexyl methacrylate (PyMA), comprises a block that is attached to regioregular poly(3-hexylthiophene) (-P3HT) generated by GRIM and subjected to end-group modification. Due to the continuous regeneration of Cu in the reaction mixture in ICAR-ATRP compared to conventional methods, the synthesis was successfully performed with less catalyst.