Infrared laser spectroscopy of the ν2 fundamental band of D2O+

Duan, Chuanxi; Zheng, Rui; Song, Li; Wang, Ruibo

doi:10.1016/j.jms.2008.01.004

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…Table 3 summarises the ionization energies of H 2 O, HDO and D 2 O and the vibrational level positions of the corresponding cations determined from our spectra and compares them with the results of earlier studies. The position of the (010) band of D 2 O + is in agreement with, but less precise than, the value obtained by Duan et al [37]. The position of the (100) band of D 2 O + agrees with the earlier results of Page et al [6] and Child and Jungen [40], but is slightly more precise.…”

Section: Transition Of H 2 O D 2 O and Hdosupporting

confidence: 82%

“…b Rotational constants from Ref. [37] and kept fixed in the fit of the ionization energy. c Rotational constants linearly extrapolated from the rotational constants of the (000) and the (010) bands and kept fixed in the fit of the ionization energy.…”

Section: Transition Of H 2 O D 2 O and Hdomentioning

confidence: 99%

“…All three fundamental vibrational wave numbers of D 2 O + and HDO + were also determined from the vibrational spectrum of the cations in solid neon matrices [26]. The most precise determinations of the positions of low-lying vibrational levels of D 2 O + reported to date are those of the (100) level by photoionization spectroscopy and Rydberg extrapolation techniques [6,40] and of the (010) level by infrared spectroscopy of the cation [37]. Next to the origin band of theX + ←X transition, our VUV laser also provided access to thẽ X + (010), (020) and (100) ←X (000) photoelectron bands of D 2 O and of the transition to the fundamental of the O-D stretching mode of HDO + .…”

Section: Transition Of H 2 O D 2 O and Hdomentioning

confidence: 99%

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Threshold ionization spectroscopy of H₂O, HDO and D₂O and low-lying vibrational levels of HDO⁺and D₂O⁺

2015

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Rotationally resolved photoelectron spectra of jet-cooled H 2 O, HDO and D 2 O have been recorded near the origin of thẽ X + ←X photoionising transition following single-photon ionization using the complementary techniques of mass-analysed threshold-ionization (MATI) and pulsed-field-ionization zero-kinetic-energy (PFI-ZEKE) photoelectron spectroscopy. A gas mixture of H 2 O, HDO and D 2 O with Ar was obtained by mixing H 2 O ( ) and D 2 O ( ) in a reservoir and bubbling Ar gas through the mixture. To unambiguously assign the photoelectron bands to H 2 O, HDO or D 2 O, the PFI-ZEKE photoelectron spectra of the mixture were compared to MATI spectra and to spectra of H 2 O. Analysis of the rotational structure of the origin bands (HDO and D 2 O and of the transitions to the (010), (020) and (100) levels of D 2 O + and the first excited level of the O-D stretching mode of HDO + provided new information on the photoionization dynamics of water and the energy level structure of HDO + and D 2 O + . IntroductionWater (H 2 O) and its cation (H 2 O + ) are prototypical small molecules [1] and play an important role on earth and in the universe. Studies of H 2 O, HDO and D 2 O by vacuum-ultraviolet photoelectron and photoionization spectroscopy provide information on their interaction with short-wavelength radiation, on their photoionization dynamics and on the energy-level structure and dynamics of the cations [2-16]. The valence-shell photoionization of water, either in a single-photon process from theX 1 A 1 ground state or in multiphoton processes through electronically excited states, has provided access to a wide range of rovibrational levels of theX + 2 B 1 andÃ + 2 A 1 states of the cation, which are degenerate in linear (D ∞h ) configurations and subject to the Renner-Teller effect [17][18][19]. Whereas H 2 O + in the first excited state is quasilinear, the equilibrium geometry of the ground cationic state is bent and similar to that of the ground state of the neutral. Consequently, many more vibrational levels of theÃ + 2 A 1 state are accessible by photoionization from the ground state of the neutral than is the case for theX + 2 B 1 state [2,4,5,12,15,16].The vacuum-ultraviolet (VUV) photoelectron spectrum of theX + 2 B 1 ←X 1 A 1 photoionising transition of water thus consists of only a few vibrational bands, i.e., a strong origin band and weak and short progressions in the bending (0, v + 2 , 0) and symmetric stretching (v + 1 , 0, 0) modes [4,12,15,16]. The weakness of the bands associated with

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Section: Transition Of H 2 O D 2 O and Hdosupporting

confidence: 82%

Section: Transition Of H 2 O D 2 O and Hdomentioning

confidence: 99%

Section: Transition Of H 2 O D 2 O and Hdomentioning

confidence: 99%

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Threshold ionization spectroscopy of H₂O, HDO and D₂O and low-lying vibrational levels of HDO⁺and D₂O⁺

2015

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“…The mid-infrared tunable diode laser spectrometer used to record the absorption spectrum of SO + has been described in detail elsewhere [21,22]. Briefly, the infrared radiations are emitted from the lead-salt diode lasers which are mounted in a liquid-nitrogen cooled Dewar (Model L5736, Laser Components).…”

Section: Methodsmentioning

confidence: 99%