RT Journal Article
T1 A velocity-map imaging study of the photodissociation of the methyl iodide cation
A1 Marggi Poullaín, Sonia
A1 Chicharro Vacas, David
A1 Rubio-Lago, Luis
A1 González-Vázquez, Jesús
A1 Bañares Morcillo, Luis
AB The photodissociation dynamics of the methyl iodide cation has been studied using the velocity map imaging technique. A first laser pulse is used to ionize methyl iodide via a (2 + 1) REMPI scheme through the 5pp - 6p Rydberg state two-photon transition. The produced CH3I+(X) ions are subsequently excited at several wavelengths between 242 and 260 nm. The reported translational energy distributions for the methyl and iodine ions present a Boltzmann-type unstructured distribution at low excitation energies as well as a recoiled narrow structure at higher excitation energies highlighting two different dissociation processes. High level ab initio calculations have been performed in order to obtain a deeper understanding of the photodissociation dynamics of the CH3I+ ion. Direct dissociation on a repulsive state from the manifold of states representing the B˜ excited state leads to CH3+(X) + I*(2P1/2), while the CH3 + I+(3P2) channel is populated through an avoided crossing outside the Franck–Condon region. In contrast, an indirect process involving the transfer of energy from highly excited electronic states to the ground state of the ion is responsible for the observed Boltzmann-type distributions.
PB Royal Society of Chemistry
SN 1463-9076
YR 2017
FD 2017
LK https://hdl.handle.net/20.500.14352/95504
UL https://hdl.handle.net/20.500.14352/95504
LA eng
NO Marggi Poullain, S., et al. «A Velocity Map Imaging Study of the Photodissociation of the Methyl Iodide Cation». Physical Chemistry Chemical Physics, vol. 19, n.o 11, 2017, pp. 7886-96. https://doi.org/10.1039/C7CP00319F.
NO Ministerio de Economía y Competitividad (España)
DS Docta Complutense
RD 7 abr 2025