| Abstract [eng] |
New three tetrasubstituted carbazole derivatives were synthesized by using Heck reaction. 9-Ethyl1,3,6,8-tetra((E)-2-(naphthalen-2-il)vinyl)-9H-carbazole, 9-ethyl-1,3,6,8-tetra((E)-2(pentafluorophenyl)vinil)-9H-carbazole and 9-ethyl-1,3,6,8-tetra((E)-2-(pyridin-4-il)vinyl)-9Hcarbazole structures were confirmed by 1H and 13C nuclear magnetic resonance (BMR), Fouriertransform infrared spectroscopy (FT-IR) and mass spectroscopy (MS) analysis. Thermal, electrochemical, photophysical properties of compounds were investigated. Compounds exhibited 5 % weight loss in the range of 289–415 oC. Glass transition temperatures ranged from 59 °C to 134 °C and melting temperatures were recorded between 163 oC and 291 °C. Crystallization temperature was recorded only for 9-ethyl-1,3,6,8-tetra((E)-2-(pyridin-4-yl) vinyl)-9H-carbazole at 73 ° C. Absorption maxima of the synthesized compounds ranged from 355 nm to 380 nm, and the maximum photoluminescence was recorded in the range of purple and light blue. Investigations of electrochemical properties have shown that ionization potentials vary from 5.27 eV to 5.58 eV. The highest ionization potential was recorded for the 9-ethyl-1,3,6,8-tetra((E)-2-(naphthalen-2-il)vinyl)9H-carbazole and the lowest for 9-ethyl-1,3,6,8-tetra((E)-2-(pentafluorophenyl)vinil)-9H-carbazole. A technological scheme for the production of the synthesized compounds was developed. |
