Spectroscopic studies of the solvent polarities of room-temperature liquid ethylammonium nitrate and its mixtures with polar solvents

Autor:	Hermann Schneider, Ina-Maria Herfort
Rok vydání:	1991
Předmět:	Solvent chemistry.chemical_compound Betaine Chemistry Absorption band Organic Chemistry Solvatochromism Inorganic chemistry Molecule Ethylammonium nitrate Physical and Theoretical Chemistry Ground state Spectral line
Zdroj:	Liebigs Annalen der Chemie. 1991:27-31
ISSN:	1099-0690 0170-2041
DOI:	10.1002/jlac.199119910105
Popis:	The maximum wavelength of the solvatochromic absorption band of Dimroth-Reichardt's dye I, 2,4,6-triphenylpyridinium N-4-(2,6-diphenylphenoxide) betaine, has been determined at 25°C from the ultraviolet-visible spectra of solutions of this dye in ethylammonium nitrate (EAN) and its mixtures with several polar solvents. The related molar transition energy, ET(30) in kcal/mol, of the long-wavelength absorption band increases sharply, when EAN is dissolved at low concentrations in the various solvents. The pronounced blue shift of the absorption band is attributed to the hydrogen-bond interaction between the ethylammonium cation and the ground state of the betaine molecule.
Databáze:	OpenAIRE
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