Mass selected and high resolution anion-ZEKE spectra of I-(H2O) are presented. Linewidths as narrow as 3 cm-1 have been observed for a resolution of the apparatus of 2 cm-1 (maximum resolution 1.5 cm-1). From a first tentative assignment we deduce electronic and vibrational information about the neutral ground and the lowest electronic excited states of the iodine-water cluster. The spectra exhibit the typical iodine spin-orbit splitting, two low frequency vibrational modes of 45 cm-1 and 210 cm-1 and a shift of the whole transition system of more than 3000 cm-1. The latter is mainly due to the strong interaction of the iodine anion with the water molecule. Rotational excitation is discussed. In addition, mass spectra of anionic iodine-water clusters (0 < n < 18) are presented. There is no evidence for thermodynamically preferred cluster size.
|Number of pages||15|
|Journal||International Journal of Mass Spectrometry and Ion Processes|
|State||Published - 1996|
Bibliographical noteFunding Information:
The authors thank the Deutsche Forschungs-gemeinschaft for financial support of this work (Project No. Bo 718/5).
- Anion mass spectrometry
- Anion spectroscopy
- Iodine-water cluster
- Photodetachment photoelectron spectroscopy
ASJC Scopus subject areas