NEGATIVE ION PHOTOELECTRON SPECTROSCOPY OF $NH_{2}^{-}(NH_{3})_{1}$ AND $NH_{2}^{-}(NH_{3})_{2}$

Coe, James V.; Snodgrass, J. T.; McHugh, K. M.; Freidhoff, C. B.; Bowen, K. H.

NEGATIVE ION PHOTOELECTRON SPECTROSCOPY OF $NH_{2}^{-}(NH_{3})_{1}$ AND $NH_{2}^{-}(NH_{3})_{2}$

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Date

1985

Authors

Publisher

Ohio State University

Abstract

The negative ion photoelectron spectra of the cluster ions, $N H 2 − (N H 3) 1$ and $N H 2 − (N H 3) 2$ , have been obtained. The negative cluster ions were produced by placing a biased filament on the high vacuum side of a nozzle expansion of $N H 3$ . The transitions corresponding to that appearing in the photodetachment spectrum of $N H 2 −$ are stabilized by 0.518 eV and 0.996 eV in the spectra of $N H 2 − (N H 3) 1$ and $N H 2 − (N H 3) 2$ , respectively. Just as in $H − (N H 3) 1$ , a second peak at lower electron kinetic energy is observed in the spectrum of $N H 2 − (N H 3) 1$ , and this is related to the asymetric stretch of ammonia. Implications of the fact that $N H 2 (N H 3) 1$ has a greater electron affinity than $H (N H 3) 1$ , even though $N H 2$ and H have almost the same electron affinities, will be explored.

Description

Author Institution: Department of Chemistry, The Johns Hopkins University; Department of Chemistry, The Johns Hopkins University; Department of Chemistry, The Johns Hopkins University; Department of Chemistry, The Johns Hopkins University; Department of Chemistry, The Johns Hopkins University

URI

http://hdl.handle.net/1811/12161

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Abstracts of OSU International Symposium on Molecular Spectroscopy 1980-1989

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