Direct visualization of the H–Xe bond in xenon hydrides: Xenon isotopic shift in the IR spectra

Abstract

IR spectra of xenon hydrides (HXeCCH, HXeCC, and HXeH) obtained from different xenon isotopes ((129)Xe and (136)Xe) exhibit a small but detectable and reproducible isotopic shift in the absorptions assigned to H-Xe stretching (by 0.17-0.38 cm(-1)). To our knowledge, it is the first direct experimental evidence for the H-Xe bond in HXeY type compounds. The shift magnitude is in good agreement with quantum-chemical calculations.

Strong-Field Dissociative Double Ionization of Acetylene

“…Our results on the one hand demonstrate that the two-body fragmentation channels are governed by the removal of electrons from the lower-lying molecular orbitals; on the other hand, they experimentally verify the central role of the electron localization-assisted enhanced ionization mechanism in the strong-field deprotonation ionization of acetylene. Our present work will shed some light on the understanding and controlling of the rich electron-nuclear dynamics of complex polyatomic, in particular hydrocarbon, molecules [15][16][17][18][41][42][43][44][53][54][55] in strong laser fields. …”

“…For its significance in understanding the chemical and biological processes [39], the photoisomerization of acetylene has been the subject of numerous experimental [37,[40][41][42][43][44][45][46][47][48][49] and theoretical [50][51][52][53] studies. As compared to the excitation by extreme ultraviolet pulses [40], where the isomerization mainly occurs on the cation state (indicated by the yielded high KERs peaked at 5.8 eV), our intense near-infrared laser pulse initiates the isomerization on the C 2 H 2 2þ dication state [42,45], resulting in KERs mainly below 5.0 eV [see Fig.…”

The radiation-induced chemistry in solid xenon matrices

“…Another application of monoisotopic xenon matrices for structural studies can be illustrated by observation of xenon isotopic shift in the IR spectra of xenon hydrides [37].…”

Noble gases

“…For the first time the H-Xe bond in HXeY compounds has been unambiguously assigned in IR spectra. 35 The incorporation of the heavy isotope 136 Xe in HXeCCH, HXeCC and HXeH has exhibited a detectable isotopic shift (0.17-0.38 cm À1 ) in absorptions believed to arise from H-Xe stretching compared to compounds containing 129 Xe.…”