INVESTIGADORES
SCAFFARDI Lucia Beatriz
artículos
Título:
RELAXATION PROCESS OF SINGLET EXCITED STATE OF 3-3 DIETHYLOXADICARBOCYANINE IODIDE (DODCI) PHOTOISOMER
Autor/es:
RICARDO DUCHOWICZ; LUCÍA SCAFFARDI ; JORGE O.TOCHO
Revista:
CHEMICAL PHYSICS LETTERS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 1990 vol. 170 p. 497 - 501
ISSN:
0009-2614
Resumen:
AbstractFluorescence induced by laser excitation was used in the study of the deactivationprocesses of excited states of both isomeric forms of 3,3=-diethyloxadicarbocyanineiodide (DODCI). Connection between excited states was analyzed by a two-stepexcitation method, and no evidence of a direct connection between them was found atlow concentrations. This technique allowed us to obtain a normal fluorescence freephotoisomer spectrum for the first time. Using cw excitation, saturated fluorescencespectra were interpreted on the basis of a photochromic system involving normal andphotoisomer ground states and excited singlet states. A similar one-dimensional barrierpicture is obtained, comparing the results with the direct photoisomerization process.
