title: In search of the thermo/halochromism of the E(T)(30) pyridinium-N-phenolate betaine dye.
abstract: The thermohalochromic behavior of Reichardt's E(T)(30) betaine - the temperature-dependent variation of its halochromic band in the presence of a cation - was investigated for the first time in NaI solutions of HBD- (methanol, ethanol, 1-propanol, 1-butanol) and non-HBD-solvents (acetonitrile, dimethylformamide) at 15 and 55 °C. The solvent-dependent thermohalochromism of the pyridinium-N-phenolate betaine dye was interpreted in terms of the effect of the temperature on the dye-cation association in solution.
authors.affiliation: Facultad de Química y Biología, Universidad de Santiago de Chile, Av. B. O'Higgins 3363, Santiago, Chile. marcos.caroli@usach.cl
authors.forename: Marcos Caroli
authors.initials: MC
authors.lastname: Rezende
authors.forename: Andrés
authors.initials: A
authors.lastname: Aracena
mesh_terms: D001622:Betaine / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D011726:Pyridinium Compounds / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013696:Temperature
chemical_list: D004396:Coloring Agents; D010636:Phenols; D011726:Pyridinium Compounds; D012997:Solvents; D001622:Betaine