Photoionization and ionic dissociation of the C₃H₃NS molecule induced by soft X‐ray near the C1s edge

Abstract

Time of flight mass spectrometry, electron-ion coincidence, and ion yield spectroscopy were employed to investigate for the first time the thiazole (C H NS) molecule in the gas phase excited by synchrotron radiation in the soft X-ray domain. Total ion yield (TIY) and photoelectron-photoion coincidence (PEPICO) spectra were recorded as a function of the photon energy in the vicinity of the carbon K edge (C1s). The C1s resonant transitions as well as the core ionization thresholds have been determined from the profile of TIY spectrum, and the features were discussed. The corresponding partial ion yields were determined from the PEPICO spectra for the cation species produced upon the molecular photodissociation. Additional ab initio calculations have also been performed from where relevant structural and electronic configuration parameters were obtained for this molecule.

Destruction and multiple ionization of PAHs by X-rays in circumnuclear regions of AGNs

“…The experimental setup for the SGM and SXS beamlines has been described in detail elsewhere (Lago et al 2004;Boechat-Roberty et al 2009;Lago et al 2017). Briefly, X-ray photons perpendicularly intersect the gas sam-ple inside a ultra-high vacuum chamber ( 10 −8 mbar), leading to molecular ionization and dissociation, from which the ion products were analyzed and studied.…”

VUV-Induced Photodissociation of the Chloroacetone Molecule Studied by Photoelectron-Photoion Coincidence Spectroscopy

“…We have been devoted to the investigation of relevant molecular systems with the purpose of obtaining reliable information on their photoionization, ion dissociation products, electronic structures, and spectroscopic and thermochemical properties. Such investigations are performed by using photon sources in the VUV and soft X-rays ranges, electron–ion coincidence spectroscopy and mass spectrometry techniques, − in conjunction with quantum chemical methods.…”

Chemical Understanding of the Limited Site-Specificity in Molecular Inner-Shell Photofragmentation

“…More generally, x-ray photoionization proceeds via electron promotion into the continuum and relaxation by Auger decay. Experimentally this process has been studied [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] with electron-ion coincidence methods. Site-selectivity is obtained by exciting or ionizing atoms of different elements [10][11][12]22 or, for atoms of same elements, by using site-specific chemical shifts in a variety of medium-sized carbon 9,17,18,20,24,25 and silicon-containing 13,16,19 molecules.…”