Self-assembly of tartrazine molecules in water- dimethylsulphaxide solution

Abstract

Spectroscopic and theoretical calculations have shown that the self-aggregation of tartrazine molecules occurs in an aqueous and water-dimethylsulphaxide solution with a hypochromic effect in their electronic spectra. The deformation of the absorption spectra is accompanied by long-wave broadening. The absorption band of the dye E102 self-aggregates corresponds to the maxima λmax=463nm and λmax=483nm. Studies of the linear dichroism spectra have established that tartrazine self-aggregates, which have a needle-like structure, have optical activity. These data are the passport characteristics of self-assembled tartrazine molecules and they can be used to determine the nativity of dye self-aggregates. It is established that by selecting the concentration and ratios of binary solvent mixtures, it is possible to regulate the number of molecules in the self-aggregated dye molecules. The integration of tartrazine molecules into self-aggregates occurs by Van der Waals forces.

Spectroscopic features of diphenylaryethylenes and arylpolyenes having substituted groups in pairs

“…At the same time, it was found that the uneven distribution of charges contributes to the appearance of the dipole moment of molecules. In these cases, the value of the dipole moment in the excited state will be 3 times greater with respect to the values of µ in the ground state ( The results obtained indicate that the botochromicity of the electron spectra, along with the energy of the π electron bonds, also affects the value of the dipole moment of the molecules that contribute to the emergence of the solvation effect [14,15]. Based on these data, it can be concluded that when polar molecules dissolve in hexane as a result of intermolecular interactions (MMV), the potential energy of the solvate increases, which is facilitated by the bathochromic shift of the electron spectra, which is consistent with the experimental results of the molecules [16].…”

Спектроскопия Самосборка Молекул Тартразина

“…Прежде всего, нами был исследован спектр поглощения тартразина в воде [26]. При этом установлено, что в спектре длинноволновой полосы поглощения наблюдается максимумом с λмах=426нм.…”

Development of the installation and experimental research of the patterns of change in influencing factors in the process of tomato drying

“…The following requirements are imposed on the method and device for drying vegetable raw materials in agricultural production [1][2][3][4][5][6][7][8]:…”

“…Therefore, for a long time, the efforts of many scientists [15] were aimed at finding new alternative technologies for drying materials using non-traditional methods of exposure, the main goal of which was and is to reduce the drying time without loss of biologically active substances of the product. In this regard, a number of important theoretical and practical differences between thermal radiation drying of IR radiation from classical methods of heating and heat transfer makes it popular [4,8,15].…”