The positive halochromism of phenolate dyes in hydroxylic solutions of tetraalkylammonium cations

Marcos Caroli Rezende; Moisés Dominguez; Andrés Aracena

doi:10.1016/j.saa.2011.11.010

The positive halochromism of phenolate dyes in hydroxylic solutions of tetraalkylammonium cations

Spectrochim Acta A Mol Biomol Spectrosc. 2012 Feb 15:87:61-6. doi: 10.1016/j.saa.2011.11.010. Epub 2011 Nov 18.

Authors

Marcos Caroli Rezende¹, Moisés Dominguez, Andrés Aracena

Affiliation

¹ Facultad de Química y Biología, Universidad de Santiago, Av. B.O'Higgins 3363, Santiago, Chile. marcos.caroli@usach.cl

PMID: 22155213
DOI: 10.1016/j.saa.2011.11.010

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Betaine / chemistry*
Cations / chemistry
Coloring Agents / chemistry*
Hydroxybenzoates / chemistry*
Hydroxyl Radical / chemistry
Models, Molecular
Quaternary Ammonium Compounds / chemistry*
Salts / chemistry

Substances

Cations
Coloring Agents
Hydroxybenzoates
Quaternary Ammonium Compounds
Salts
Hydroxyl Radical
Betaine
phenolic acid