13780-23-9Relevant articles and documents
Ultraviolet photodissociation dynamics of H2S and D2S
Weiner, Brad R.,Levene, Harold B.,Valentini, James J.,Baronavski, A. P.
, p. 1403 - 1414 (1989)
Nascent SH(X 2Πi, v''= 0,1) and SD(X 2Πi, v''= 0,1) rotational state population distributions, spin-orbit state population ratios, and Λ-doublet state population ratios have been measured following the UV excimer laser photodissociation of H2S (λ = 193, 222, and 248 nm) and D2S (λ = 193 and 222 nm), respectively.Nascent SH(X 2Πi, v'' = 0) rotational state distributions following 193 nm photodissociation of cold H2S in a free jet expansion vs 300 K H2S in a flowing gas cell were essentially the same, indicating that photofragment angular momentum must be originating predominantly in the dissociation event, and not from rotational energy contained in the parent triatom.Laser excitation spectra of SH(X 2Πi, v''= 1) and SD(X 2Πi, v''= 1) have been recorded for the first time.Rotational state distributions for SH(X 2Πi, v'') and SD(X 2Πi,v'') are independent of v''. Λ-doublet population ratios of the nascent photofragments are essentially unity for all the cases measured.The nascent rotational state distributions are consistent with an impact parameter model for the dissociating triatomic molecule.
Two-photon resonance enhanced MPI-PES above the lowest ionization threshold. Observation of the [a(1)Δ)]5pπ(2)Φ state of the SH (SD) radical
Milan, J. B.,Buma, W. J.,Lange, C. A. de,Western, C. M.,Ashfold, M. N. R.
, p. 326 - 331 (1995)
A (2+1) resonance enhanced multiphoton ionization photoelectron spectroscopy (REMPI-PES) study of the hitherto unobserved [a(1)Δ]5pπ(2)Φ Rydberg state of the SH (SD) radical is reported. Despite the fact that this state has an excitation energy which exceeds the lowest ionization energy, ionization is observed to occur preferentially by the absorption of a third photon after the two-photon excitation step, rather than through autoionization. Photoelectron spectra show a large asymmetryin the rotational branching ratios, which is attributed to the high value of Λ(+) in the ionic state.
Zero-kinetic-energy pulsed-field ionization spectroscopy of the a1Δ state of SH+ (SD+)
Milan,Buma,De Lange
, p. 521 - 527 (1996)
The results of a zero-kinetic-energy pulsed-field ionization study on the a 1Δ (v+ = 0) excited ionic state of SH+ (SD+) obtained via two-photon excitation of the [a 1Δ]3dπ 2Φ (v′ = 0) Rydb
193 nm photodissociation of H2S: The SH internal energy distribution
Hawkins, W. G.,Houston, P. L.
, p. 297 - 302 (1980)
The dynamics of H2S and D2S photodissociation at 193 nm have been investigated using an ArF excimer laser to photolyze the parent compound and a tunable, doublet dye laser to probe the energy content of the SH or DH radicals via the laser induced fluorescence technique.The SH radicals are produced with nearly Boltzmann rotational distributions characterized by temperatures of 375+/-15 and 220+/-15 K for the SH(2Π3/2) states, respectively.No vibrationally escited SH or SD fragments were observed.An upper limit on the SH(υ=1)/SH(υ=0) ratio of 0.005 was determined.The ratio of SH(2Π3/2 to SH(2Π1/2) was 3.75+/-0.20.Although roughly 20 000 cm-1 of energy is available to the fragments, the average internal energy of the SH fragments is only 320+/-20 cm-1.Thus, most of the available energy must appear in the relative recoil coordinate between the H and SH fragments.This observation is in good agreement with the conclusions of previous studies and with a quasidiatomic kinematic picture of the dissociation.
Predissociation dynamics of the A 2Σ+ state of SH and SD
Wheeler, Martyn D.,Orr-Ewing, Andrew J.,Ashfold, Michael N. R.
, p. 7591 - 7600 (2007/10/03)
The technique of cavity ring-down spectroscopy has been used to investigate predissociation in the A 2Σ+ state of the SH and SD radicals. Spectra were recorded of the A-X (1,0) band of SH and the (1,0), (2,0) bands of SD. Linewidth measurements of transitions to individual rovibrational levels of the A state revealed increasing predissociation rates with vibrational and rotational quantum number. These and all other available data have been reproduced, quantitatively, by Fermi Golden Rule calculations employing the best (experimentally determined) analytic potential for the A state and ab initio repulsive potentials and spin-orbit coupling matrix elements.
Kinetics of the Reaction of HS and HSO with O3
Wang, Niann S.,Howard, Carleton J.
, p. 8787 - 8794 (2007/10/02)
The kinetics of the reaction of HS and HSO with O3 have been studied in a discharge flow system coupled to a laser magnetic resonance spectrometer: HS + O3 -> HSO + O2 (1); HSO + O3 -> products (2).Measurements were made at low pressures (1-2.2 Torr) and
