| Abstract [eng] |
The aim of this work was the design, synthesis and characterization of new carbazole and 1,2,3- triazole derivatives. In the first part of the research project, new 3,6-disubstituted carbazole derivatives were synthesized by substitution of 1,2,3-triazole linking heterocycle. In the second part of work 1,3,5- tri substituted benzene were synthesized by substitution of triple bond as π–spacer and 1,2,3-triazole linking fragments. All structures of new derivatives were identified by nuclear magnetic resonance spectra. Optical, photophysical, thermal and electrochemical properties were estimated. Thermal characteristics were estimated by different scaning calorimetry and thermogravimetrical analysis methods. All synthesized compounds have good thermal stability and high glass transition temperatures ranging in the intervals of 87–172 ºC, 5 % weight loss temperatures are in the range of 331–492 ºC. The absorbtion maxima of the dilute solutions and thin layers of the compounds are observed at 226–345 nm. The fluorescence maxima are observed ranging in the intervals of 363–415 nm with the quantum efficiency ranging from 22% to 85%. Triple bond has a stronger influence for optical and photophysical properties, than 1,2,3–triazole linking moieties. Electrochemical studies were performed for all the synthesized compounds by cyclic voltammetry. Ionization potentials and electron affinities were calculated from voltampherograms and absorbtion band gap, values are in the range of 5,09–5,73 eV and of 1,70–2,27 eV, respectively. |
