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Bonding in boranes and their interaction with molecular hydrogen at extreme conditions
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10.1063/1.3244982
/content/aip/journal/jcp/131/14/10.1063/1.3244982
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/14/10.1063/1.3244982
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Molecular structure of DB; large, dark spheres are boron and small, light spheres are hydrogen (Refs. 7–10).

Image of FIG. 2.
FIG. 2.

Optical photomicrographs of AB sample surrounded by fluid at 0.7 GPa viewed through diamond anvil; (a) sample at room temperature, (b) at sample is beginning to react; (c) at after heated to , AB has completely reacted.

Image of FIG. 3.
FIG. 3.

Raman spectra of AB at high pressure and varying temperature. (a) Loss of B–N stretching modes at and reduction in B–H bending modes upon increasing temperature. (b) Broadening of B–H stretching modes and N–H stretching modes at 0.7 (black) and 3 GPa (gray).

Image of FIG. 4.
FIG. 4.

Raman spectra of vibron in heated AB (black) at 3 GPa and in free region (gray).

Image of FIG. 5.
FIG. 5.

Optical photomicrographs of DB sample surrounded by fluid (a) after loading at 1.5 GPa; (b) during compression, sample at 8.9 GPa; (c) gasket hole began to expand at 11.2 GPa; (d) during decompression at 5.7 GPa, sample in the upper left corner becomes transparent.

Image of FIG. 6.
FIG. 6.

Raman spectra for the B–B bending and stretching, B–H bending modes of in . indicates decompression data. All the other data are taken during compression. Gray lines are spectra taken from the transparent region.

Image of FIG. 7.
FIG. 7.

Raman shift for the B–B bending and stretching, B–H bending modes in as a function of pressure. Open triangles are from the spectra taken of the transparent region. Vertical dashed line indicates where transition is observed. New peaks from the high pressure phase are marked by arrows.

Image of FIG. 8.
FIG. 8.

(a) Raman spectra for the bridge modes. indicates the data were taken during decompression. Gray lines are those from the transparent region. All other data are taken during compression. (b) Raman shift as a function of pressure where empty triangles are from spectra taken of the transparent region. Vertical dashed line indicates where transition is observed. New peaks from the high pressure phase are marked by arrows.

Image of FIG. 9.
FIG. 9.

(a) Raman spectra for the B–H stretching modes. indicates the data were taken during decompression. Gray lines are those from the transparent region. All the other data are taken during compression. (b) Raman shift as a function of pressure where open triangles are from spectra taken of the transparent region. Dashed lines are guides for the eye.

Image of FIG. 10.
FIG. 10.

The Raman spectra of vibron from the transparent region of DB (gray) and from the free region (black) taken at 3.7 GPa.

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/content/aip/journal/jcp/131/14/10.1063/1.3244982
2009-10-12
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Bonding in boranes and their interaction with molecular hydrogen at extreme conditions
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/14/10.1063/1.3244982
10.1063/1.3244982
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