INVESTIGADORES
DELLA VEDOVA Carlos Omar
artículos
Título:
Dissociative Photoionization of sulfenylcarbonyl -C(O)S- compounds induced by synchrotron radiation
Autor/es:
GERONÉS, MARIANA; ERBEN, MAURICIO F.; CORTÉS, EMILIANO; RODRÍGUEZ PIRANI, LUCAS; GE, MAOFA; ROMANO, ROSANA M.; YAO, LI; DELLA VEDOVA, CARLOS O.
Revista:
REVISTA MEXICANA DE FíSICA
Editorial:
SOC MEXICANA FISICA
Referencias:
Año: 2010 vol. 56 p. 24 - 29
ISSN:
0035-001X
Resumen:
Recently, we have started with the study of the shallow and core-shell electronic excitation and fragmentation dynamics of carbonylsulfenyl (XC(O)SY) compounds. The compounds of the type XC(O)SY, related to important biological macromolecules, especially to coenzyme A, 1 have been the subject of many theoretical and experimental investigations. By using synchrotron radiation in the range of 100-1000 eV, total ion yield (TIY) spectra, as well as multicoincidence spectra (photoelectron-photoion coincidence, PEPICO, and photoelectron-photoion-photoion coincidence, PEPIPICO) were measured around the S 2p, Cl 2p, C 1s, O 1s, and F 1s transitions of the following carbonylsulfenyl (XC(O)SY) compounds: FC(O)SCl2,3, ClC(O)SCl4, CH3C(O)SH5 and CH3OC(O)SCl6. Fragmentation patterns deduced from PEPICO spectra at various excitation energies in the VUV and soft X-ray regions were especially analyzed in order to establish the existence of a site-specific fragmentation effect. Also, ionic double coincidences were examined, and dissociation mechanisms were proposed to explain the shape and slope of observed PEPIPICO islands.