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This article is cited in 4 scientific papers (total in 4 papers)
Spectroscopy of condensed matter
High resolution IR spectroscopy of low temperature matrices. The structure of fundamental absorption bands of SiH$_{4}$ in nitrogen and argon matrices
R. E. Asfin, M. V. Buturlimova, T. D. Kolomiitsova, I. K. Tokhadze, K. G. Tokhadze, D. N. Shchepkin Saint Petersburg State University
Abstract:
The features of high resolution IR spectra of the SiH$_{4}$ molecule in N$_2$ and Ar low-temperature matrices at 6.6–20 K were analyzed depending on experimental conditions. It was found, that in the nitrogen matrix in region of stretching vibration of $^{28}$SiH$_{4}$ three narrow bands are observed, in the region of bending vibration ($\nu_4$) two bands are observed instead of one, which is explained by a change in the symmetry of the molecule from $T_d$ in the gas phase to $C_{3v}$ in solid nitrogen. In the argon matrix spectra change even more, where, in addition to narrow bands, the broad enough components are also recorded. The calculations of the SiH$_{4}$ spectrum in the Ar matrix were performed based on the QM/MM approach, which confirm the reality of the change in the symmetry of the molecule as a result of its interaction with the matrix environment.
Keywords:
monoisotopic silane, matrix isolation, QM/MM calculations, matrix effects, change in the symmetry of a molecule.
Citation:
R. E. Asfin, M. V. Buturlimova, T. D. Kolomiitsova, I. K. Tokhadze, K. G. Tokhadze, D. N. Shchepkin, “High resolution IR spectroscopy of low temperature matrices. The structure of fundamental absorption bands of SiH$_{4}$ in nitrogen and argon matrices”, Optics and Spectroscopy, 128:10 (2020), 1478–1487; Optics and Spectroscopy, 128:10 (2020), 1588–1597
Linking options:
https://www.mathnet.ru/eng/os279 https://www.mathnet.ru/eng/os/v128/i10/p1478
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