The electronic absorption spectra of Pinacyanol Chloride in various solvents of different polarities have been studied at room temperature. The solvent effects on the wave numbers of the absorption band maxima (?max) were discussed using the following solvent parameters, refractive index (n), dielectric constant (e) and empirical Kamlet-Taft solvent parameters, p* (dipolarity/ polarizability), a (hydrogen bond donating capacity) and ß (hydrogen bond accepting capacity). The solute- solvent interactions were determined on the basis of multilinear solvation energy relationships concept. The fitting coefficients obtained from this analysis allowed us to estimate the contribution of type of interactions to the total spectral shifts in solution. The established dependences between ?max and the solvent parameters emphasize that the visible band of the studied molecules is affected by both non-specific and specific solute-solvent interactions.
Cite this article:
Banti Ganguly, R.K. Nath. Solvatochromic behavior on the absorption spectra of Pinacyanol Chloride dye in various solvents. Asian J. Research Chem. 5(9): September, 2012; Page 1113-1117.