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Your search keyword '"Dorohoi, Dana-Ortansa"' showing total 27 results
Start Over Author "Dorohoi, Dana-Ortansa" Publisher elsevier b.v.
27 results on '"Dorohoi, Dana-Ortansa"'

25. Solvent scales used to study the intermolecular interactions in binary solutions of two p-aryl-pyridazinium methylids.

Author

Babusca, Daniela and Dorohoi, Dana Ortansa

Subjects
*SOLVENTS, *INTERMOLECULAR interactions, *INTERMOLECULAR forces, *MOLECULAR dynamics, *CHARGE transfer
Abstract

The visible electronic absorption band with intramolecular charge transfer of two pyridazinium ylids having common carbanion and different heterocycles is recorded in solutions and its position is correlated to parameters of some empirical scales of solvents. The nature of the intermolecular interactions in pyridazinium ylid solutions is discussed and the supply of each type of interaction is established based on solvatochromic study. [ABSTRACT FROM AUTHOR]

Published
2016
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26. New method to determine the optical rotatory dispersion of inorganic crystals applied to some samples of Carpathian Quartz.

Author

Dimitriu, Dan Gheorghe and Dorohoi, Dana Ortansa

Subjects
*OPTICAL rotation, *DISPERSION (Chemistry), *WAVELENGTHS, *QUARTZ, *CRYSTALS, *MOLECULAR spectroscopy
Abstract

Highlights: [•] Optical rotatory dispersion is estimated using channeled spectra. [•] Optical rotatory dispersion decreases with light wavelength increasing. [•] The proposed method is validated by data from literature. [ABSTRACT FROM AUTHOR]

Published
2014
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27. About intermolecular interactions in binary and ternary solutions of some azo-benzene derivatives.

Author

Ivan, Liliana Mihaela, Closca, Valentina, Burlea, Marin, Rusu, Elena, Airinei, Anton, and Dorohoi, Dana Ortansa

Subjects
*INTERMOLECULAR interactions, *SOLUTION (Chemistry), *BENZENE derivatives, *QUANTUM mechanics, *SOLVATOCHROMISM, *REGRESSION analysis, *PERMITTIVITY
Abstract

The nature and strength of the intermolecular interactions in the solutions of three azo-benzene derivatives (AD i , i = 1, 2, 3) were established by solvatochromic effects in solvents with different electric permittivities, refractive indices and Kamlet–Taft constants. A quantum mechanical analysis corroborated with spectral data offered information about the excited state dipole moments and polarizabilities of the studied compounds. The separation of the supply of universal and specific interactions to the total spectral shift was made based on the regression coefficients from the equations describing the solvatochromic effect. Supplementary information about the composition of the first solvation shell and the energy in the solute–solvent molecular pairs were obtained analyzing the ternary solutions of AD i , i = 1, 2, 3 compounds in solvent mixture Methanol (M) + n -Hexane (H). [ABSTRACT FROM AUTHOR]

Published
2015
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