INVESTIGADORES
DENOFRIO Maria Paula
artículos
Título:
One- and Two-Photon Excitation of ß-Carbolines in Aqueous Solution: pH-Dependent
Autor/es:
M. MICAELA GONZALEZ; JACOB ARNBJERG; M. PAULA DENOFRIO; ROSA ERRA-BALSELLS; PETER R. OGILBY; FRANCO M. CABRERIZO
Revista:
JOURNAL OF PHYSICAL CHEMISTRY A
Editorial:
American chemical society
Referencias:
Lugar: Washington D.C.; Año: 2009 vol. 113 p. 6648 - 6656
ISSN:
1089-5639
Resumen:
ß-Carboline (ßC) alkaloids are present in a wide range of biological systems and play a variety of significant photo-dependent roles.  In this work, a study of the aqueous solution-phase photochemistry, photophysics, and spectroscopy of five important ßC derivatives [norharmane (nHo), harmane (Ho), harmine (Ha), N-methyl-norharmane (N-Me-nHo) and N-methyl-harmane (N-Me-Ho)] upon one- and two-photon excitation is presented. The results obtained depend significantly on pH, the ambient oxygen concentration, and on the ßC substituent, and provide unique insight into a variety of fundamental photophysical phenomena. The data reported herein should not only help contribute to understanding the roles played by ßC alkaloids in biological systems, but should also help in the development of methods by which the photoinduced behavior of these important compounds can be controlled.