ИСТИНА

Luminophores, as functional materials, are successfully used in various fields of science and technology. Among these materials, derivatives of 2,1,3-benzothiadiazole play a significant role due to their unique optical and electronic properties. The luminescent properties of these molecules can be tuned by incorporating different donor substituents. The main goal of this work is to investigate the relationship between the chemical structure and properties of these systems. A series of conjugated compounds based on 2,1,3 benzothiadiazole were synthesized, which contain donor thiophene and benzene moieties in their structures, as well as various terminal substituents. Optimal methods for obtaining these compounds through Pd-catalyzed cross-coupling reactions (Suzuki) were developed in two different ways. The spectral properties of the compounds obtained in dilute solutions were also investigated. It was found that the end groups have a negligible effect on optical properties. When alkyl groups are added, a slight shift of the luminescence maximum towards longer waves is observed. These molecules also have a high quantum yield of 86-90%. The influence of alkyl substituents on the thermal properties was investigated using TGA/DSC techniques. The melting point of derivatives that have terminal alkyl groups decreases compared to the unsubstituted compound. Thus, BTD derivatives exhibit a high level of chemical and thermal stability, a high quantum yield, and a wide Stokes shift. These properties make BTD-based phosphors versatile and suitable for a variety of applications