Dissociative Photoionization of Methyl Thiocyanate, CH3SCN in the Proximity of the Sulfur 2p Edge

CORTéS, EMILIANO; ERBEN, MAURICIO F.; GERONéS, MARIANA; ROMANO, ROSANA M.; DELLA VEDOVA, CARLOS O.

JOURNAL OF PHYSICAL CHEMISTRY A

AMER CHEMICAL SOC

Año: 2009

1089-5639

Abstract Dissociative photoionization of gaseous CH3SCN has been investigated in the S 2p core level by using time-of-flight mass spectrometry and synchrotron radiation. The total ion yield spectrum has been assigned by comparison with available data from electron energy loss spectra. The relative abundances of the ionic fragments and their kinetic energy release values have been obtained from both PEPICO (Photoelectron Photoion Coincidence) and PEPIPICO (Photoelectron Photoion Photoion Coincidence) spectra. The dynamic of the ionic fragmentation of S 2p excited CH3SCN is dominated by the rupture of both carbon-sulfur bonds. This process may be related with electronic excitations from the ground electronic state to vacant ó* molecular orbitals.