Synthesis and photophysical studies of novel thiazole-linked bisazo dyes

In this thesis, monoazo and bisazo dyes containing two thiazole groups with D-π-A structure were synthesized. Azo dyes with D-π-A system are conjugated molecules with vivid colors. The ability to transfer electrons between electron donor and acceptor groups shapes the absorption, reflection and color change properties of light. Thiazole azo compounds are the most widely preferred in the production of red azo dyes, which have superior durability properties. At the same time, azo disperse dyes containing the thiazole group are at the forefront due to their superior properties. The structures of the synthesized compounds were investigated by FT-IR (ATR), 1H NMR, 13C NMR and LCMS methods. The photophysical properties of the obtained dyes were investigated in solvents of different polarity. The electronic transition mechanism, sensitivity to acids and bases, color and structure change, and pH sensitivity of the obtained dyestuffs were investigated by UV-Visible Region (UV-VR) Spectroscopy.