The influence of pressure on the infrared spectra of hydrogen-bonded solids. III. Compounds with N-H...X bonds

Hamann, S. D.; Linton, M

doi:10.1071/ch9761641

Cited by 53 publications

(53 citation statements)

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“…21,22 The phenomenon observed here is anomalous for the dihydrogen bonding molecule such as NH 3 BH 3 . 23 Because that pressure restricted rotation of CH 3 groups and locked them in position in the compounds, although a large number of molecular compounds containing CH 3 groups undergo orderdisorder transitions with temperature or pressure which involve rotation of the groups such as CH 3 HgM, M = Cl, Br, I, 24 and (CH 3 ) 2 XM, X = Sn or Tl (Refs.…”

Section: Resultsmentioning

confidence: 67%

High-pressure study of tetramethylsilane by Raman spectroscopy

Qin

Zhang

Troyan

et al. 2012

The Journal of Chemical Physics

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High-pressure behavior of tetramethylsilane, one of the Group IVa hydrides, was investigated by Raman scattering measurements at pressures up to 142 GPa and room temperature. Our results revealed the phase transitions at 0.6, 9, and 16 GPa from both the mode frequency shifts with pressure and the changes of the full width half maxima of these modes. These transitions were suggested to result from the changes in the inter- and intra-molecular bonding of this material. We also observed two other possible phase transitions at 49-69 GPa and 96 GPa. No indication of metallization in tetramethylsilane was found with stepwise compression to 142 GPa.

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Section: Resultsmentioning

confidence: 67%

High-pressure study of tetramethylsilane by Raman spectroscopy

Qin

Zhang

Troyan

et al. 2012

The Journal of Chemical Physics

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“…40,41 A large number of molecular compounds containing CH 3 or NH 3 groups undergo orderdisorder transitions with temperature or pressure which involve rotation of groups such as the BH 3 and NH 3 groups in ammonia borane. For example, in CH 3 HgX ͑X = Cl, Br, I͒ ͑Ref.…”

Section: Discussionmentioning

confidence: 99%

Raman spectroscopy study of ammonia borane at high pressure

Lin

Mao

Drozd

et al. 2008

The Journal of Chemical Physics

100

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Ammonia borane, NH(3)BH(3), has attracted significant interest as a promising candidate material for hydrogen storage. The effect of pressure on the bonding in NH(3)BH(3) was investigated using Raman spectroscopy to over 20 GPa in a diamond anvil cell, and two new transitions were observed at approximately 5 and 12 GPa. Vibrational frequencies for the modes of the NH(3) proton donor group exhibited negative pressure dependence, which is consistent with the behavior of conventional hydrogen bonds, while the vibrational frequencies of the BH(3) proton acceptor group showed positive pressure dependence. The observed behavior of these stretching modes supports the presence of dihydrogen bonding at high pressure. In addition, the BH(3) and NH(3) bending modes showed an increase in spectral complexity with increasing pressure together with a discontinuity in d nu/d P which suggests rotational disorder in this molecule. These results may provide guidance for understanding and developing improved hydrogen storage materials.

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“…[23][24][25] Single crystal x-ray diffraction study [25] of formamide suggests a new b phase with denser packing but same space group at pressure~0.88 GPa by reconstruction of N-H---O hydrogen bond along with the formation of new C-H---O type hydrogen bonds. Acetamide [26] , Polyamide PA 66 [27] and oxamide [28] are other amides in which changes in the hydrogen bonding networks are indicated by Raman or infrared spectroscopic studies. Variations in the hydrogen bonds of acrylamide are also reported in brief by an infrared absorption study carried out up to 5 GPa.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen bonds and polymerization in acrylamide under pressure

Sharma

Murli

Sharma

2013

J Raman Spectroscopy

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Acrylamide (C3H5NO), a hydrogen‐bonded amide, is an important compound from the point of view of basic and material research. It can be used as a model system for studying hydrogen bonding interactions in amides under pressure. As it is a monomer of polyacrylamide, an important polymer, high pressure investigation of polymerization in this material is also of interest. Our in‐situ high pressure Raman spectroscopic investigations of acrylamide carried out up to 17 GPa under quasi‐hydrostatic conditions indicate possible structural variations through the reconstruction of the N‐H‐‐‐O hydrogen bonds at pressures above 2.6 GPa. Emergence of several new spectral features at higher pressures indicate onset of polymerization. The characteristic polymer band becomes discernible at ~17 GPa. The increase in the relative intensity of the polymer peaks with respect to the monomer peaks on release to ambient conditions suggests that higher fraction of polymer is obtained on decompression. Copyright © 2013 John Wiley & Sons, Ltd.

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The influence of pressure on the infrared spectra of hydrogen-bonded solids. III. Compounds with N-H...X bonds

Cited by 53 publications

References 0 publications

High-pressure study of tetramethylsilane by Raman spectroscopy

High-pressure study of tetramethylsilane by Raman spectroscopy

Raman spectroscopy study of ammonia borane at high pressure

Hydrogen bonds and polymerization in acrylamide under pressure

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