1356181-40-2Relevant academic research and scientific papers
The positive halochromism of phenolate dyes in hydroxylic solutions of tetraalkylammonium cations
Rezende, Marcos Caroli,Dominguez, Moisés,Aracena, Andrés
, p. 61 - 66 (2012)
By contrast with the negative halochromic behaviour shown by phenolate betaines in the presence of alkaline and alkaline-earth cations, the addition of tetraalkylammonium salts to hydroxylic solutions of these dyes generate bathochromic shifts of their charge-transfer band. This positive halochromic behaviour by organic cations was examined systematically and its origin rationalized by nonspecific changes of the medium permittivity, and by specific dye-cation interactions in solution.
