The Excess Refractive Indices of Some Organic and Inorganic Components

To reveal the concentration-dependent optical properties of aqueous, ethanol and toluene binary solutions, the refractometry method was used. The peak of refractive indices corresponds to formed heteromolecular complexes with a certain concentration. The bonds between the molecules formed in mixtures are also directly related to their chemical structure. The bonds that form between polar and non-polar compounds and also between polar protic and polar aprotic compounds are different. All solutions were measured in the concentration range ~0÷1 mole fraction at room temperature. In our work, we have shown that, along with Infrared and Raman spectroscopy, the refractometric method is effective for the determination of formed structures in mixtures.

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