HeI photoelectron spectroscopic (PES) studies of the electronic structure for Si(CH3)nCl4−n (n = 1, 2, 3) compounds

VUV-induced dissociation of methylchlorosilanes, studied by electron–ion coincidence spectroscopy

“…Particularly in the case of the H 2 CCl + ion the appearance energy reported by Lu et al is by 1.1 eV lower than that from the present experiment. Notably, their value of 16.29 eV falls in the gap in the binding energy scale of available electronic states of MeCl 3 Si (figure 1 and [14]) and therefore the probability of creating, by the 30 eV radiation used in this experiment, the molecules with the internal energy corresponding to the 16.29 eV threshold is very low. In contrast, at photon energies just above 16.29 eV, resonant processes in photoabsorption could enhance the photoemission of near-zero-energy electrons and the production of high internal energy ions significantly.…”

“…The valence electronic structure of all methylchlorosilane Me n Cl 4−n Si (n = 1-3) molecules has been investigated by photoelectron spectroscopy using He I radiation [14] and a lower quality spectrum of Me 3 ClSi has been published [15]. Also relevant is an early extensive study of many halosilanes by Frost et al [16].…”

He I Photoelectron Spectroscopic (PES) Study on the Electron Structure of Perchloric Acid, HOClO3, and Fluorine Perchlorate, FOClO3

“…Recently, systematic He I photoelectron spectroscopic (PES) studies on the electronic structures of XONO 2 , where X is F, Cl, or Br, were carried out in this laboratory. − As part of our systematic work on the chemical species involved in ozone depletion, He I PES studies on the electronic structure of XOClO 3 , where X is H, F, Cl, or Br, are also being pursued, as these also play an important role as novel temporary reservoir species in stratospheric chemistry, including ozone depletion …”