ИСТИНА

The active development of organic electronics and photonics leads to the search for new materials and new types of devices based on them. A large number of works are devoted to the synthesis and study of both new high-performance polymers and small molecules for use in the field of organic sensors, light-emitting diodes, solar cells, etc. On the way to the final device, the undoubted advantages of small molecules are a certain molecular structure, a known molecular weight, simpler purification methods and good reproducibility [1 ]. Oligoarylsilanes are one of the well-known and promising classes of molecules for organic electronics and photonics [2 ]. However, the scope of their application often limits the short-wavelength range of absorption and emission spectra characteristic of this class of compounds [3 ]. The solution to this issue can be a new molecular design, where the molecules contain fragments of the donor and acceptor types connected to each other by covalent bonds. Such a strategy will make it possible to tune the absorption and luminescence spectra, as well as the energies of the HOMO and LUMO levels and the band gap. As follows from the literature, a few examples of star-shaped D-A arylsilanes have been described. The search for new molecules, the study of their properties is an actual task that will expand our knowledge on this class of compounds. In this presentation, a multistage synthetic rout, including organometallic synthesis, Suzuki cross-coupling reaction, and the Knoevenagel condensation, with the help of which two star-shaped oligoarylsilane molecules were obtained, differing from each other by the central fragment on each branch, will be described (Fig1). Their optical properties in the film and dilute solutions, thermal and thermoelectric properties were studied. In addition, nanoparticles obtained from these new oligoarylsilanes, their size distribution and stability in water will be presented.