ANALYSIS OF COMBINED MILLIMETER-WAVE AND FOURIER TRANSFORM INFRARED SPECTRA OF DN₃: EXTENSION OF THE ANALYSIS TO EIGHT NEW VIBRATIONAL STATES

Woods, R. Claude

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https://hdl.handle.net/2142/122364 Copy

Description

Title

ANALYSIS OF COMBINED MILLIMETER-WAVE AND FOURIER TRANSFORM INFRARED SPECTRA OF DN₃: EXTENSION OF THE ANALYSIS TO EIGHT NEW VIBRATIONAL STATES

Author(s)

Woods, R. Claude

Contributor(s)

• Wood, Samuel A.
• Vávra, Karel
• Urban, Stepan
• Smith, Houston H.
• Owen, Andrew N.
• Orr, Vanessa L.
• McMahon, Robert J.
• Kisiel, Zbigniew
• Kania, Patrik
• Esselman, Brian J.
• Billinghurst, Brant E.
• Amberger, Brent K.

Issue Date

2023-06-22

Keyword(s)

Vibrational structure/frequencies

Abstract

We present a combined millimeter-wave and high-resolution infrared (FTIR) analysis of the spectra of DN₃. We have observed the infrared spectrum of DN₃ at a resolution of 0.0009 cm−¹ using the synchrotron at the Canadian Light Source between 30 and 5000 cm−¹ at several pressures between 1 and 100 mTorr. We have also measured the millimeter-wave spectrum of DN₃ at Wisconsin and at Prague, covering a frequency range from 130 to 730 GHz. Using classical linear least-squares fitting and combination differences, we have assigned the spectra for the ground state and 15 lowest-energy vibrationally excited states (including 8 not previously studied). The latter include the four combination states of either ν₃ or ν₄ with either ν₅ or ν₆ and the tetrad of states involving three quanta of ν₅ and ν₆. In fact, all sixteen of these vibrational states are a complex polyad coupled by Coriolis, Darling-Dennison, and Fermi interactions that strongly perturb the observed transition frequencies. We are working toward combining all of this spectral data to achieve a global state fit using SPFIT.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122364

DOI

https://doi.org/10.15278/isms.2023.6912

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