INVESTIGADORES
CABRERIZO franco Martin
artículos
Título:
One- and Two-Photon Excitation of b-Carbolines in Aqueous Solution: pH-Dependent Spectroscopy, Photochemistry, and Photophysics
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:
ACS
Referencias:
Año: 2009 vol. 113 p. 6648 - 6656
ISSN:
1089-5639
Resumen:
b-Carboline (bC) 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 three important BCs [norharmane (nHo), harmane (Ho) and harmine (Ha)] and two bC derivatives [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 bC substituent, and provide unique insight into a variety of fundamental photophysical phenomena. The data reported herein should not only help to understand the roles played by bC 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.