Tracing photoionisation behaviour of methyl iodide in gas phase: From isolated molecule to molecular aggregate

Multiple ionization and Coulomb explosion of molecules, molecular complexes, clusters and solid surfaces

“…However, it should be mentioned that Coulomb explosion of clusters followed by the ejection of ions with large charge number and high energy occurs even by using nanosecond laser pulses [22,23]. In the cases of the Coulomb explosion processes initiated by using nanosecond and/or picosecond laser pulses, clusters can relax to their most stable structures and, thus, information about the initial configuration is lost.…”

“…When the charge numbers of MMCs are large enough, the energies released in Coulomb explosion are easily several tens of eV, which is significantly more than typical chemical bonding energies. Coulomb explosion processes have been discussed for molecules [20] and clusters [21][22][23] in the gas phase. In contrast, Coulomb explosions of solids such as metals, dielectrics, semiconductors, polymers, and molecular crystals have been less emphasis even in recent reviews of the subject [24][25][26][27].…”

Branching ratios in the dissociative photoionization of iodomethane by photoelectron photoion coincidence

“…As pointed out by Das et al , 1 iodomethane (methyl iodide) is one of the most studied molecules when it comes to ionization, dissociative ionization, or probing the evolution of excited neutrals using time-resolved spectroscopic techniques. Precisely because iodomethane is considered a spectroscopic benchmark system, new experimental techniques, such as ion imaging and velocity map imaging, were also first demonstrated with CH 3 I as a sample.…”

Different Dynamics of CH3 and Cl Fragments from Photodissociation of CH3Cl in Clusters

“…Therefore, their photolysis after the Ã-band absorption was investigated by a number of experimental and theoretical studies. − The unique role of the C–X bonding in these molecules combines the simplicity of the diatomic photolysis with the complexity of multidimensional potential hypersurfaces of polyatomic molecules involving different vibronic states and conical intersections. Although a great effort was put into a detailed understanding of the dissociation pathways of isolated CH 3 X monomers, − experimental studies investigating the influence of the cluster environment on the photodissociation pathways are rarer. ,,− Here we address this issue by investigating the CH 3 Cl photodissociation in clusters at 193.3 nm using the velocity map imaging (VMI), which is a well-established technique to study CH 3 X photolysis. ,,, …”