Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5025090 | Optik - International Journal for Light and Electron Optics | 2017 | 16 Pages |
Abstract
The physical properties of five different samples of azo merocyanine dyes, each dissolved in three different polar solvents (Acetonitrile, Ethanol and 1-propanol) with three different concentrations (3 Ã 10â5, 2 Ã 10â5 and 1 Ã 10â5 mol/L) have been measured experimentally. The refractive indices of the samples have been determined with an accuracy of ±1 Ã 10â4 by using an Abbe Refractometer of measuring range from 1.300 to 1.700. The measurements have been performed at four different wavelengths (435.8, 546.1, 578.0 and 589.3 nm). Other parameters such as Cauchy's dispersion constants, resonance wavelength, molar polarizability, molar refractivity, absorption index and abbe number have been calculated. Also, viscosity, thermal expansivity and the effect of temperature on refractive index have been investigated. The intermolecular interactions between the solute and the solvent have been discussed. The physical characterization of merocyanine dyes provides valuable and important information needed for using them in many applications.
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Authors
M. Medhat, S.Y. El-Zaiat, Farag M.A. Altalbawy, Hagar M. Saleh,