Photodissociation spectroscopy of Mg+H2O

Chen-Sheng Yeh, K. F. Willey, D. L. Robbins, J. S. Pilgrim, M. A. Duncan

Research output: Contribution to journalArticle

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Abstract

Mg+H2O ion-molecule complexes are produced in a pulsed supersonic nozzle cluster source. These weakly bound complexes are mass selected and studied with laser photodissociation spectroscopy in a reflectron time-of-flight mass spectrometer system. An electronic transition assigned as 2B2→X2A1 is observed with an origin at 28399 cm-1 (vac). The spectrum has a prominent progression in the metal-H2O stretching mode with a frequency (ω′e) of 517.1 cm-1. An extrapolation of this progression fixes the excited state dissociation energy (D′0) at 16008 cm-1. The corresponding ground state value (D″0) is 8732 cm-1 (25.0 kcal/mol). The solvated bending mode and asymmetric stretching mode of water are also active in the complex. A second electronic transition assigned as 2B1←X 2A1 is observed with an origin at 30386 cm-1 and a metal stretch frequency of 483.4 cm-1. This study was guided by ab initio calculations by Bauschlicher and co-workers, which provide accurate predictions of the electronic transition energies, vibrational constants and dissociation energies.

Original languageEnglish
Pages (from-to)233-238
Number of pages6
JournalChemical Physics Letters
Volume196
Issue number3-4
DOIs
Publication statusPublished - 1992 Aug 14

Fingerprint

Photodissociation
photodissociation
Stretching
Metals
Spectroscopy
progressions
Mass spectrometers
electronics
Excited states
Extrapolation
dissociation
Ground state
spectroscopy
supersonic nozzles
Nozzles
Ions
fixing
metals
mass spectrometers
Molecules

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Yeh, C-S., Willey, K. F., Robbins, D. L., Pilgrim, J. S., & Duncan, M. A. (1992). Photodissociation spectroscopy of Mg+H2O. Chemical Physics Letters, 196(3-4), 233-238. https://doi.org/10.1016/0009-2614(92)85960-I
Yeh, Chen-Sheng ; Willey, K. F. ; Robbins, D. L. ; Pilgrim, J. S. ; Duncan, M. A. / Photodissociation spectroscopy of Mg+H2O. In: Chemical Physics Letters. 1992 ; Vol. 196, No. 3-4. pp. 233-238.
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Yeh, C-S, Willey, KF, Robbins, DL, Pilgrim, JS & Duncan, MA 1992, 'Photodissociation spectroscopy of Mg+H2O', Chemical Physics Letters, vol. 196, no. 3-4, pp. 233-238. https://doi.org/10.1016/0009-2614(92)85960-I

Photodissociation spectroscopy of Mg+H2O. / Yeh, Chen-Sheng; Willey, K. F.; Robbins, D. L.; Pilgrim, J. S.; Duncan, M. A.

In: Chemical Physics Letters, Vol. 196, No. 3-4, 14.08.1992, p. 233-238.

Research output: Contribution to journalArticle

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Yeh C-S, Willey KF, Robbins DL, Pilgrim JS, Duncan MA. Photodissociation spectroscopy of Mg+H2O. Chemical Physics Letters. 1992 Aug 14;196(3-4):233-238. https://doi.org/10.1016/0009-2614(92)85960-I