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Título : Experimental determination of the electronic polarizability of quinoline and isoquinoline in solution by three new strategies
Autor : Leal, María
Alvarado, Ysaías
Cubillán, Néstor
Labarca, Paola
Michelena, Elba
Marrero Ponce, Yovani
Palabras clave : QUINOLINA
POLARIZABILIDAD DEL DIPOLO
MÉTODO REFRACTOMÉTRICO
KRAMERS
KRÖNIG
RELACIONES
Fecha de publicación : 2006
Editorial : Maracaibo: Springer
Citación : Leal, María y otros (2006). Experimental determination of the electronic polarizability of quinoline and isoquinoline in solution by three new strategies. Journal of Solution Chemistry 36 (9): 1139–1155
Resumen : The values of electronic polarizability of quinoline and isoquinoline in extremely diluted liquid solution are reported in this paper. These were obtained by means of three new strategies based on UV-visible-NIR spectroscopy, the Kramers-Krönig relations, high precision densitometry and high exactitude refractometry, which are called here Arakawa’s Approximation (AA), Optical Substractive Approximation (OSA) and Optical Differential Approximation (ODA). In general the static electronic polarizability values of solute molecules obtained by ODA and OSA are in excellent agreement with the reported theoretical values at the Density Functional Theory (DFT) level and the Atom monopole-dipole model, but strong discrepancies were observed with the experimental values previously reported for quinoline and isoquinoline using refractometric and electro-optic methods. These differences were interpreted and analyzed in terms of dielectric intermolecular forces, resonant and pre-resonant effects. The AA method is shown to fail in predicting the polarizability of the quinoline and isoquinoline molecules.
URI : http://www.dspace.uce.edu.ec/handle/25000/14661
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