Ftir Spectrum Of The N4+ Molecular Ion Trapped In Solid Neon

Marilyn E. Jacox; Warren E. Thompson

doi:10.1117/12.969445

1 December 1989 FTIR Spectrum Of The N₄⁺ Molecular Ion Trapped In Solid Neon

Marilyn E. Jacox, Warren E. Thompson

Proceedings Volume 1145, 7th Intl Conf on Fourier Transform Spectroscopy; (1989) https://doi.org/10.1117/12.969445
Event: Seventh International Conference on Fourier and Computerized Infrared Spectroscopy, 1989, Fairfax, VA, United States

Abstract

In studies of the codeposition at 4 K of a Ne:N2 = 100 or 200 mixture with a beam of neon atoms excited in a microwave discharge, a weak to moderately intense absorption at 2237.6 cm-1 can be assigned to the N4+ molecular cation. Earlier mass spectrometric studies had determined that N4+ is bound by approximately 23 kcal/mol with respect to N2 + N2+. Both ab initio calculations and electron spin resonance observations have indicated that N4 has a linear structure in its ground state. The analysis of the FTIR spectrum is also consistent with a linear structure. The sensitivity of the Bomem DA3.002 FTIR instrument used for these studies is sufficiently great for detection of the high frequency symmetric stretching absorption of several of the noncentrosymmetric isotopic species of N4+. A least squares force constant fit to the isotopic data provides a satisfactory assignment for all of the observed peaks.

Citation Download Citation

Marilyn E. Jacox and Warren E. Thompson "FTIR Spectrum Of The N₄⁺ Molecular Ion Trapped In Solid Neon", Proc. SPIE 1145, 7th Intl Conf on Fourier Transform Spectroscopy, (1 December 1989); https://doi.org/10.1117/12.969445

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