OBSERVATION OF $\nu_{4}$ BAND TRANSITIONS OF $NH^{+}_{4}$ AND $ND^{+}_{4}$
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Date
1996
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Ohio State University
Abstract
The tetrahedral ammonium ion has two triply-degenerate infrared-active fundamentals. In 1983, Crofton and Oka; and Schafer, Begemann, Gudeman and Saykally observed the $\nu_{3}$ fundamental of $NH^{-}_{4}$ in glow discharges. Several subsequent studies have been reported, but only one concerns the other IR-active fundamental. In this work, more than thirty new lines in the $\nu_{4}$ band of $NH^{+}_{4}$ are reported, together with the first detection of the same band of $ND^{+}_{4}$ These ammonium ions were observed in a water-cooled hollow cathode discharge with a diode laser spectrometer. A program was written to fit the spectra to fourth order based upon the spherical top Hamiltonian of Robierte et al. and using an uncoupled basis set.
Description
Author Institution: Department of Chemistry, Mississippi State University