Akademik Veri Yönetim Sistemi
3rd International Conference on Basic Sciences and Technology (ICBAST) , Antalya, Türkiye, 16 - 19 Kasım 2023, cilt.25, ss.59-66
Low-cost instruments are used to achieve high sensitivity, accuracy and precision with
electrochemical techniques, making them the most suitable analytical methods used to investigate the
electrochemical properties of a new molecule. Among these techniques, cyclic voltammetry, which is widely
employed, allows for the determination of electronic characteristics such as molecular energy levels and orbital
structure, redox properties, sensor capabilities, surface activity, and more. The carbazole molecule can undergo
derivatization from various positions, allowing for alterations in its electrical and optical properties. These
compounds serve as heterocyclic building blocks that can be utilized as materials for organic sensitizers and
semiconductors in optoelectronic devices. Due to the presence of a hydrogen atom in the nitrogen-hydrogen (NH) bond within the carbazole structure, which can be replaced with different functional groups, carbazole is
highly suitable for nitrogen-based derivatization studies. In this study, two different carbazole monomers (IIa
and IIIa), which could be potential optoelectronic, were synthesized using the Ullman and Suzuki-Miyaura
reaction and characterized using 1H NMR, 13C NMR, UV-Vis, and Flouresence spectroscopy techniques. The
cyclic voltammetry experiments were performed using three different working electrodes (Au, Gc, Pt disk
electrodes) for each compound. Since the optimum oxidation of the compounds was obtained from the
voltammograms on the gold disk electrode, this electrode was used in the calculation of energy levels. HOMO
and Eg values of the compounds were deduced from cyclic voltammetry experiments and the optical absorption
bands, respectively.