ИСТИНА

Both low-molecular-weight and high-molecular-weight compounds are used to improve the properties of organic light-emitting diodes (OLED). Despite the success of using small molecules, industrial production requires optimizing such properties as thermal and oxidative stability, service life, and adaptability. To solve these problems, the concept of non-conjugated polymers with pendant chromophores, analogues of small molecules, is proposed . One of the widespread photosystems is the carbazole/triazine-1,3,5 donor-acceptor (DA) pair, which makes it possible to create a blue OLED . A special feature of this molecular system is the presence of a thermally activated delayed fluorescence (TADF) mechanism, which allows fine-tuning of photovoltaic characteristics. In this work, 9-N-phenylcarbazole and 2,4,6-trisphenyltriazine-1,3,5 were synthesized, which were selected as models for studying the optical properties of four polymers with different types of main chains – polystyrene and polysiloxane – and the DA ratio of fragments (Fig.1). The obtained models were characterized by NMR spectroscopy and HPLC. Comparative analysis has shown that effective TADF exists in the studied polymers. This work was supported by FFSM (project FFSM-2024-0003).