Preparation and properties of perichromic dye: an undergraduate laboratory

AUTOR(ES)

Abarca, Priscilla, Silva, Patricia, Almodovar, Iriux, Rezende, Marcos Caroli

FONTE

Quím. Nova

DATA DE PUBLICAÇÃO

2014

RESUMO

An undergraduate experiment that illustrates the phenomenon of perichromism-the sensitivity of a dye to its microenvironment, as assessed by color changes of its solutions-is described. An easily prepared perichromic imine is synthesized and characterized, and its solvatochromism, thermochromism, halochromism, and preferential solvation in binary solvent mixtures are demonstrated by visual inspection of its solutions. The results are rationalized by invoking solute - solvent interactions in the various media.

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