ИСТИНА

Polymers based on triphenylamine (TPA) are of great interest to researchers. Such materials demonstrate a combination of high thermal and electrochemical stability with good hole-transport properties. The introduction of a TPA block into macromolecules helps to suppress intermolecular aggregation and reduce the tendency to crystallization. As a result, such materials have good solubility and, as a rule, are amorphous and have high glass transition temperatures. The attachment of various electron-withdrawing groups to such polymers allows fine tuning of the electrochemical and optical properties of the resulting materials. Such advantages of triphenylamine-containing polymers make it possible to use them as an active layer in various devices of organic electronics and photonics1, 2. In this work, we report on the design, synthesis and complex study of new D-A conjugated polymer based on triphenylamine with electron-withdrawing hexyldicyanovinyl groups (Figure 1). The purity and chemical structure of the precursors and the final polymer were studied by gel permeation chromatography and 1H NMR spectroscopy. The electrochemical, thermal, and optical properties of the obtained polymer were studied using cyclic voltammetry, differential scanning calorimetry, thermogravimetric analysis, and ultraviolet spectroscopy. Comparison of the properties of the obtained polymers with different molecular weights with each other and with the closest low-molecular-weight analog will reveal the influence of the type of molecular organization on the properties of such compounds. This work was supported by RFBR (project № 20-73-00266).