Observation of ArOH in a pulsed discharge system

Bramble, Simon K.; Hamilton, Peter A.

doi:10.1016/0009-2614(90)87098-c

Cited by 38 publications

(13 citation statements)

References 29 publications

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“…The spectroscopy of the electronic transition is very similar to that for OD discussed above provided that vibrational bands with no excitation of the van der Waals bending vibration v 2 are studied. 6,7 We adopt the vibrational labeling of Chang et al 6 and the assignments of Bramble et al 8 Schnupf et al 11 have assigned this band to the ͑0,0,4͒-͑0,0,0͒ transition but the exact vibrational assignment does not influence the following discussion. The laser excitation spectrum of this band is shown in Fig.…”

Section: B the Ar-od Complexmentioning

confidence: 99%

“…In recent years, the Ar•OH/D complex has received much attention from ab initio, spectroscopic and dynamic studies [5][6][7][8][9][10][11][12][13] and may be regarded as being a prototypical open shell van der Waals complex. These studies have focused on the A 2 ⌺ ϩ electronic state which is of particular interest as it has an unusually strong van der Waals bond and may be conveniently studied by laser excitation spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Quantum beat study of the nuclear hyperfine structure of OD and Ar⋅OD in their A 2Σ+ electronic states

Carter

Povey

Bitto

et al. 1996

The Journal of Chemical Physics

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Articles you may be interested inHyperfine structures of the 7Li2 b 3Π u , 23Π g , and 33Π g states: Continuous wave perturbation facilitated optical-optical double resonance spectroscopy A threedimensional wave packet study of ArI2(B)→Ar + I + I electronic predissociationHyperfine and Zeeman quantum beats of the Na(32 P 3 / 2-32 S 1 / 2) transition, and the decay of coherence J. Chem. Phys. 90, 5238 (1989); 10.1063/1.456477Radiative lifetime measurements of the Alu states of Ar2 and Kr2* AIP Conf.The nuclear hyperfine structure of OD and Ar•OD in their A 2 ⌺ ϩ electronic states has been studied by quantum beat spectroscopy. The very cold transient species were produced in a supersonic expansion using a pulsed discharge nozzle. Coherent excitation of hyperfine ͑hf͒ states, arising from one fine structure ͑OD͒ or rotational ͑Ar•OD͒ level, created quantum beats on the fluorescence decay. The beat frequencies, which correspond to energy separations between hf levels, could be measured to Ϯ75 kHz. The splitting of the hf levels into their Zeeman components was investigated in a weak magnetic field. A fit of the zero field and Zeeman data yielded the relevant constants for the nuclear magnetic and electric quadrupole hyperfine interactions as well as the pertinent g-factors in each species. In the case of OD, the hf parameters agree well with those reported previously but are more accurately defined. For Ar•OD the previously unknown hyperfine and spin-rotation parameters of the A 2 ⌺ ϩ state were determined. A comparison of the hf parameters in the two systems allowed assessment of the effect of van der Waals complex formation on the electron distribution. Thus complexation is found to reduce the unpaired electron density on the deuteron by 7% which is indicative of significant chemical bonding between the Ar atom and the OD moiety in the A 2 ⌺ ϩ state of Ar•OD. For both systems, the g-factors g S and g l obtained suggest an admixture of other, possibly quartet, electronic states into the A 2 ⌺ ϩ state.

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Section: B the Ar-od Complexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantum beat study of the nuclear hyperfine structure of OD and Ar⋅OD in their A 2Σ+ electronic states

Carter

Povey

Bitto

et al. 1996

The Journal of Chemical Physics

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“…Spectroscopic characterization of radical van der Waals complexes provides one means for probing such interactions. To date, spectra for the triatomic complexes NO-Rg, [9][10][11][12][13][14][15][16][17][18][19][20][21][22]24 d CN N 25 h e, an -e ave been reported. Of these, OHID-Ar is by far the most intensely studied.…”

Section: Introductionmentioning

confidence: 99%

Electronic spectroscopy and relaxation dynamics of OH–Ne and OD–Ne

Lin

Fei

Zheng

1992

The Journal of Chemical Physics

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The structure and dynamics of OHID-Ne complexes have been probed via studies of the A-X electronic transition. Bands associated with the OHID 0-0, 1--0, and 2-1 transitions have been rotationally resolved and analyzed. Closely similar progressions of van der Waals vibrational levels were seen in conjunction with each parent transition. In the A state, the observed levels were assigned to the zero point, the-Ne stretch fundamental, and internal rotor-stretch combinations. From this data, the barrier to internal rotation was estimated to be 43 cm -1 and a lower limit of Db> 68 cm-I was established for the OHID(A)-Ne bond. Predissociation of OHID(A,v = 1,2)-Ne has been characterized by time-and wavelength-resolved fluorescence measurements. Vibrational predissociation rates were found to be in the range of (2-6) X HP S-I. Fragment OH/D(A,v = 0) rotational distributions indicated that vibration-rotation transfer was the primary decay channel. Electronic predissociation ofOH(A,v = 2)-Ne was observed. The rate for this process was found to be dependent on the average position of the Ne atom. 5020

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“…[1][2][3][4][5][6] Such systems are inherently interesting from the point of view of studying open-shell complexes and also provide excellent systems in which to study microsolvation and n-atom cage effects. Furthermore, radical-molecule complexes are of considerable importance to reaction dynamicists studying photochemical reactions in clusters.…”

mentioning

confidence: 99%