Abstract
We present the (2 + 1) mass-resolved resonance-enhanced multiphoton ionisation (REMPI) spectrum of the [2∏3/2]c5d;Ωg (Ω = 0,2) Rydberg states of the I2-Kr van der Waals complex. Anharmonic progressions in the I2⋯Kr van der Waals stretching mode have been observed with ω̃e values of 49 ± 2 and 47 ± 2 cm-1 for the [2∏3/2]c5d;Ω = 0g and [2∏3/2]c5d;Ω = 2g states, respectively. The [2∏3/2]c5d;Ω = 2g state of I2-Kr has been used as an intermediate in a two-colour (2 + 1′) zero kinetic energy pulsed-field ionisation (ZEKE-PFI) photoelectron study of the X̃2∏3/2, g state of the I2 +-Kr ionic complex. The adiabatic ionisation energy was determined to be 74248 ±3 cm-1. An anharmonic vibrational progression in the I2 +⋯Kr van der Waals stretching mode was observed giving a value of ω̃c = 55 ± 2 cm-1 for the X̃2∏3/2, g state of the complex. The [2∏1/2]c6s;Ω = 1g Rydberg state of the I2-N2 van der Waals complex has also been observed using REMPI spectroscopy. Anharmonic progressions in the I2⋯N2 van der Waals stretching mode have been observed with ω̃e = 71 ± 2 cm-1. Comparisons are made between the spectroscopic data obtained for the Rydberg states of I2-Kr and I2-N2 with the analogous Rydberg states in I2-Ar.
| Original language | English |
|---|---|
| Pages (from-to) | 4245-4251 |
| Number of pages | 7 |
| Journal | Journal of the Chemical Society - Faraday Transactions |
| Volume | 93 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 1 Jan 1997 |