ИСТИНА

The research of new molecules and their properties plays a crucial role in various fields of modern science and technology. Over the past decade, thienothiophenes have become an excellent foundation for the development of hole-transport materials for organic electronics. However, the derivatives of donor-acceptor type materials (D-A materials) with various nitrogen-containing moieties and their electron transport characteristics remain largely unexplored. Therefore, the synthesis and investigation of structures based on D-A materials and various nitrogen-containing precursors is a necessary part of the search for materials with optimal optoelectronic properties. The objective of this study is the synthesis of new structures based on BTBT (Benzothiene[3,2-b][1]-benzothiophene) derivatives, and the investigation of their optical and thermal properties. The previously obtained dibromo-BTBT derivative was subjected to Buchwald-Hartwig coupling reactions with various amines. The obtained compounds were purified using flash chromatography and recrystallization, and their structure was established and confirmed by modern analytical methods. It is shown that with the complication of the amine fragment, the quantum yield significantly decreases from a satisfactory 60% to an extremely low 16% and the drain shift increases from 20 to 90 nm. The thermal properties of the obtained materials are comparable or exceed those of commercially demanded NPB. This provides prospects for further research. We believe that derivatives can also work well in TADF OLED, OPV, PLED and QLED systems, providing their outstanding stability and resolution.