Changes induced by solvent polarity in electronic absorption spectra of some azo disperse dyes
作者： A. Airinei , M. Homocianu , D.O. Dorohoi
DOI: 10.1016/J.MOLLIQ.2010.07.011
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摘要: Abstract The electronic absorption spectra of some azo disperse dyes in various solvents different polarities have been studied at room temperature. solvent effects on the wavenumbers band maxima (ṽmax) were discussed using following parameters, refractive index, n, dielectric constant, e and empirical Kamlet–Taft π* (dipolarity/polarizability), α (hydrogen bond donating capacity) β accepting ability). solute–solvent interactions determined basis multilinear solvation energy relationships concept. fitting coefficients obtained from this analysis allowed us to estimate contribution each type total spectral shifts solution. established dependences between ṽmax parameters emphasize that visible molecules is affected by both non-specific specific interactions.
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