Infrared spectroscopy of the stretching modes of SeH− and TeH− in KCl and KBr

Mungan, Carl E.; Happek, U.; Hossain, T.Z.; Sievers, A. J.

doi:10.1016/0022-3697(94)00188-x

Cited by 6 publications

(5 citation statements)

References 37 publications

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“…Similar frequency was previously attributed to bending vibrations in the surface -S-H groups [15][16][17][18][19][20]. Due to anharmonicity effects [46] the frequencies of overtones are slightly lower than integer multiples of the main line (Fig. 4).…”

Section: Ins Experimentssupporting

confidence: 83%

On hydrogen adsorption by nanodispersed MoS2-based catalysts

Afanasiev

Jobic

2021

Journal of Catalysis

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Section: Ins Experimentssupporting

confidence: 83%

On hydrogen adsorption by nanodispersed MoS2-based catalysts

Afanasiev

Jobic

2021

Journal of Catalysis

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“…ant concentrations. 20 Panels ͑c͒ and ͑d͒ show that the strengths are, again, temperature dependent. At 1.7 K, the linewidths are Lorentzian and rather narrow, 9 cm Ϫ1 for KCl:SeH Ϫ and 5 cm Ϫ1 for KBr:TeH Ϫ .…”

Section: Vibrational Sidebandsmentioning

confidence: 95%

Universal two-state reorientational dynamics of diatomic hydrides in fcc salt crystals

1996

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The reorientational spectra in the mid-and far infrared of OH Ϫ , OD Ϫ , SH Ϫ , SD Ϫ , SeH Ϫ , and TeH Ϫ in a variety of different alkali halides are studied. All of these systems have ϳ300 cm Ϫ1 modes due to librations of the diatomics about their centers of mass. A surprising change in the dynamics of these librational modes with increasing temperature is discovered: their absorption strengths are observed to disappear by ϳ150 K in the sodium-chloride-structure hosts and reappear in the millimeter-wave region in the forms of generalized-Debye spectra. This is in striking contrast to what is expected on the basis of the estimated orientational barrier heights using the known librational frequencies. It also contrasts with the cesium-chloride-structure salts, where the librational strengths of the molecules are conserved up to RT. The temperature-dependent variations of the fcc systems can be explained using a thermally activated jump-rotational-diffusion model wherein each defect hops with temperature-dependent dwell times between two distinct elastic configurations of the lattice-defect system: one involving librational and the second supporting diffusive rotational states.

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“…All these features are listed and identified in Table 2. The frequency position of the maxima of these experimental reflectivity spectra of hydrogenated CdTe compounds are compared with data available in the literature and with those of Cd or Te oxides and hydrides diluted in solid Ar and KBr matrices [4,[28][29][30][31][32][33][34][35][36][37], even though collected at different temperatures and in different chemical environments.…”

Section: Mir Reflectivity Spectra Of Cdte(h H ) Cdte(h M ) Andmentioning

confidence: 99%