A photofragment spectrometer for studying photodissociation of molecules adsorbed on surfaces: The 257‐nm photolysis of CD₃I on MgO(100)

Thermal and Photochemistry of tert-Butyl Iodide on Rutile TiO2(110)

“…12,[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] On oxides, the surface photochemistry of the widely studied alkyl iodide, CH 3 I, has been reported using single-crystal MgO(100) and TiO 2 (110) as substrates. 15,16,19,24,26,[31][32][33][34][35][36] For MgO(100), regardless of the coverage, the chemistry is attributed to photon excitation of methyl iodide, whereas for TiO 2 (110) there is good evidence for contributions initiated by photon absorption in both TiO 2 (110) and CH 3 I, the former inducing adsorbate chemistry by resonant electron transfer from the conduction band of TiO 2 to the lowest unoccupied molecular orbital (LUMO) of CH 3 I to form the transient anion, CH 3 I -. Surface chemistry initiated by photon absorption in adsorbed CH 3 I is dominated, as in the gas phase, 9,10 by C-I bond breaking, 37 while chemistry initiated by electron transfer from the substrate to CH 3 I differs in that CH 3 I ejection makes a strong contribution.…”

Understanding the Effect of an Amorphous Surface on the Ultrafast Dynamics of a Heterogeneous Photoinduced Reaction: CD3I Photoinduced Reaction on Amorphous Cerium Oxide Films

“…Therefore, an amorphous cerium oxide surface should provide multiple adsorption sites that could lead to various molecular adsorption geometries. Methyl iodide is selected as a model system for photoinduced surface reaction investigations, because its gas-phase photodissociation has been studied both experimentally − and theoretically. − In addition, the gas-phase ultrafast photodissociation dynamics of methyl iodide has been also monitored in the femtosecond (fs) time domain. − The adsorption and the photoinduced reaction of methyl iodide were studied on crystalline metallic, , semiconducting, and insulating surfaces − as well as on amorphous ice surfaces. , Furthermore, the ultrafast photoinduced reaction dynamics of methyl iodide was investigated on crystalline insulating films, which led to a prototypical example of so-called “Surface-Aligned Femtochemistry”. − …”

Understanding the effect of an amorphous surface on the ultrafast dynamics of a heterogeneous photoinduced reaction: CD3I photoinduced reaction on amorphous cerium oxide films

“…Methyl iodide is selected as a model system for photoinduced surface reaction investigations, because its electronic structure 7 and gas-phase photodissociation dynamics [8][9][10][11][12] has been investigated. Moreover, the adsorption and the photoinduced reaction of methyl iodide were investigated both theoretically and experimentally on metallic 13 , semiconducting 14 , and insulating surfaces [15][16][17][18][19] . Furthermore, the ultrafast photoinduced reaction dynamics of methyl iodide has been investigated on crystalline insulating films that led to a prototypical example of so-called "Surface-Aligned Femtochemistry".…”