Ground and excited state proton transfer in intramolecularly hydrogen bonded aromatic a-hydroxy azo, aldehydes and their derivatives

LEDESMA, G. N.; IBAÑEZ, G. A.; ESCANDAR, G. M.; OLIVIERI, A. C.

JOURNAL OF MOLECULAR STRUCTURE

Elsevier Science B.V.

Lugar: Amsterdam; Año: 1997 vol. 415 p. 115 - 121

0022-2860

Intramolecular proton transfer occurring in the ground and excited states of a series of structurally related aromatic molecules displaying strong internal hydrogen bonding is investigated. Applied spectroscopic techniques include electronic absorption and spectrofluorimetry, wich are coupled to semiempirical ground-state (AM1) and excited-state (INDO/S-CI) MO calculations. The results allow one to discern the presence of excited state intramolecular proton transfer (ESIPT) and primary fluorescence phenomena in the studied compounds.