Спектрально-люминесцентные и фотохимические свойства гомодимеров стириловых красителей и родственных соединений в растворах

Аннотация

Subjects of research: 9 new styryl dyes and 2 known cyanine dyes. Purpose of work: Study on the effects of concentration, solvent’s nature and the light irradiation on the spectral-luminescent and photochemical properties of the new synthesized homodimcr styryl dyes; the determination of the spatial structure of dye molecules by quantum-chemical calculations; elaboration of recommendations for practical applications of obtained results. Methods of research: Spectral-luminescent methods: electronic absorption and fluorescence spectra; quantum-chcmical semi-empirical method AM 1. The obtained results and their novelty: Spectral-luminescent characteristics of the new styryl dyes in different kind solvents and their changes depending on the solution concentration and light irradiation were studied. A new kind of luminescent associates of Cyan-40 and TO dyes in water and weakly polar solvent was discovered. Using quantum-chcmical methods for studied dye molecules the followings were determined: maxima of electronic absorption, spatial structure, heat of formation, electronic energy, charge distribution and dipole moment in ground and excited states. Practical value: Recommendations on practical application of obtained results in various fields of science and technology were elaborated. In particular, discovered luminescent associates of Cyan-40 and TO dyes might be usable as working media in tunable dye lasers. Determined spectral-luminescent and photochemical properties and results of quantum-chcmical calculations serve as the main characteristic data of the new styryl dyes. These arc valuable information for targeted synthesis of a new organic luminophores with defined spectral-luminescent properties. Degree of embed and economic efficiency: scientific articles, abstracts of papers at conferences and symposiums, lectures and practical lessons for bachelors and masters. Field of application: Quantum Electronics, synthesis and application of new organic luminophores.