FOURIER TRANSFORM MICROWAVE SPECTROSCOPY OF LiNH2 and NaNH2 (~X1A1): COMPARING QUADRUPOLE HYPERFINE INTERACTIONS

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https://hdl.handle.net/2142/104402

Title: FOURIER TRANSFORM MICROWAVE SPECTROSCOPY OF LiNH2 and NaNH2 (~X1A1): COMPARING QUADRUPOLE HYPERFINE INTERACTIONS
Author(s): Burton, Mark
Contributor(s): Ziurys, Lucy M.; Sheridan, Phillip M.; Russ, Benjamin
Issue Date: 2019-06-19
Keyword(s): Metal containing
Abstract: Rotational spectra of LiNH$_{2}$ and NaNH$_{2}$ in their \~{X}$^{1}$A$_{1}$ ground electronic states have been recorded using pulsed-beam Fourier transform spectroscopy in the frequency range 22-58 GHz. These species were synthesized in a DC discharge by the reaction of ammonia and the respective laser-ablated alkali metal, in argon carrier gas. Observed transitions were analyzed with previously-measured millimeter-wave frequencies, improving previous rotational constants and determining the metal electric quadrupole hyperfine parameter, $\chi$$_{aa}$, for both species. We find that $\chi$$_{aa}$ (Li) = 0.494 and $\chi$$_{aa}$ (Na) = -7.688. We also compare our results to DFT calculations. A Townes-Dailey analysis of the quadrupole constants suggest that the bonding of the –NH$_{2}$ ligand to lithium and sodium is comparable.
Publisher: International Symposium on Molecular Spectroscopy
Type of Resource: text
Language: English
Permalink: http://hdl.handle.net/2142/104402
DOI: 10.15278/isms.2019.WJ07