INVESTIGADORES
LABADIE Guillermo Roberto
artículos
Título:
Ground and excited state intramolecular proton transfer in 3,5-dibromosalicylic acid
Autor/es:
GABRIELA IBAÑEZ; GUILLERMO ROBERTO LABADIE; GRACIELA ESCANDAR; ALEJANDRO C. OLIVIERI
Revista:
JOURNAL OF MOLECULAR STRUCTURE
Editorial:
Elsevier
Referencias:
Año: 2003 vol. 645 p. 61 - 68
ISSN:
0022-2860
Resumen:
The existence of both ground- and excited-state proton transfer equilibrium between the enolic and keto tautomers of 3,5-dibromosalicylic acid has been investigated in aqueous solution using electronic absorption and luminescence emission spectroscopies, together with ab initio and semiempirical MO/CI calculations. The compound provides an example of a room temperature phosphorescence triplet-state emission from a phototautomer (ketonic) form. The interference from radiationless paths, which may in principle avoid the observation of the phosphorescence signal, was overcome by using a protective micellar medium and the presence of an external heavy atom.