Schwingungsspektren und Kraftkonstanten einiger Verbindungen des Typs X
 3
 Z←NR
 3

Sawodny, W.; Goubeau, J.

doi:10.1524/zpch.1965.44.3_4.227

Cited by 67 publications

(38 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous studies have indicated the similarity in the Raman spectrum between the free molecule and the tetragonal solid phase. 27 Our data for the lower pressure range ͑Ͻ4 GPa͒ where there are previously reported results 27,29,30,[34][35][36] are generally in good agreement. Changes in the Raman spectra of ammonia borane with increasing pressure provide the evidence for several pressure-induced phase transformations in the pressure range investigated.…”

Section: Resultssupporting

confidence: 85%

See 1 more Smart Citation

Raman spectroscopy study of ammonia borane at high pressure

Lin

Mao

Drozd

et al. 2008

The Journal of Chemical Physics

100

View full text Add to dashboard Cite

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.

show abstract

Section: Resultssupporting

confidence: 85%

“…For the symmetric B-H bending mode, the reported work differed a lot. 27,29,30,[34][35][36] In our study, we tentatively assigned the 1171 cm −1 as the symmetric bending mode. With the pressure increasing, this mode almost disappeared around 11 GPa.…”

Section: B-h Bending Regionmentioning

confidence: 67%

Raman spectroscopy study of ammonia borane at high pressure

Lin

Mao

Drozd

et al. 2008

The Journal of Chemical Physics

100

View full text Add to dashboard Cite

show abstract

“…The bands at 1380 cm −1 and 1165 cm −1 are, on the basis of extensive vibrational analysis, attributed to outof-plane δ (NH 3 ) and δ (BH 3 ) (umbrella) mode, respectively. [42][43][44] On the other hand, in frequently cited paper by Baumann et al these bands are tentatively assigned to ν(BN) + δ out-of-plane (NH 3 ) combination (1380 cm −1 ) and τ(BH 3 ) (1165 cm −1 ). 6 The observed high similarity in temperature-induced behaviour of these bands (Fig.…”

Section: Discussionmentioning

confidence: 94%

High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane^†

et al. 2016

View full text Add to dashboard Cite

The present work presents a thorough experimental investigation of mechanistic pathways of thermal decomposition of ammonia borane (AB) and its mixture with KBr. A comparative detection and temperature-dependent in-situ monitoring of the decomposition products was done by use of temperature dependent infrared (IR) spectroscopy of both solid (in transmission through KBr pellets and ATR mode) and gaseous products, thermogravimetry (TG) and evolved gas analysis mass spectroscopy (EGA-MS).This enables discrimination of the processes occuring in the bulk from those in the near-surface level. For the first time, a high influence of the KBr matrix on AB decomposition was found and thoroughly investigated. Although KBr does not change the chemical and physical identity of AB at ambient conditions, it dramatically affects its thermal decomposition pathway. It is found that the presence of KBr not only favours the production of diammoniate of diborane in the induction phase, but also enables an efficient catalysis of AB decomposition by NH + 4 ions, present at the KBr − AB interface, which leads to suppression of emission of unwanted gaseous side products other than NH 3 . IR spectroscopy was also used to shed a light on the molecular background of the frequently observed, but never investigated increase of the mass of decomposition products.

show abstract

“…Some qualitative information on the force constant and the bond order for the coordinative B-N bond were obtained from the vibrational spectra ofX3B: NR3 (X = H, CU3, F, C1, Br; R = H, CH3; Sawodny & Goubeau, 1965). The band which mainly represented the B-N vibrations was observed in the region 650 to 780 cm -~.…”

Section: Introductionmentioning

confidence: 99%

The crystal structure of hexamethylenetetramine–borine C₆H₁₂N₄.BH₃

Hanic¹,

Šubrtová²

1969

Acta Crystallogr Sect B

View full text Add to dashboard Cite

The crystal structure of hexamethylenetetramine-borine has been determined by the three-dimensional X-ray method. The space group is R3m, lattice parameters: a= 6-15 + 0-01/~ and ~.= 103.2 + 0-2 °, with one formula in the unit cell; final refinement by a three-dimensional anisotropic least-squares analysis resulted in an R value of 6.8%. Hexamethylenetetramine-borine molecules have C3v-3m symmetry.

show abstract

Schwingungsspektren und Kraftkonstanten einiger Verbindungen des Typs X ₃ Z←NR ₃

Cited by 67 publications

References 0 publications

Raman spectroscopy study of ammonia borane at high pressure

Raman spectroscopy study of ammonia borane at high pressure

High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane^†

The crystal structure of hexamethylenetetramine–borine C₆H₁₂N₄.BH₃

Contact Info

Product

Resources

About

Schwingungsspektren und Kraftkonstanten einiger Verbindungen des Typs X 3 Z←NR 3

Cited by 67 publications

References 0 publications

Raman spectroscopy study of ammonia borane at high pressure

Raman spectroscopy study of ammonia borane at high pressure

High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane†

The crystal structure of hexamethylenetetramine–borine C6H12N4.BH3

Contact Info

Product

Resources

About

Schwingungsspektren und Kraftkonstanten einiger Verbindungen des Typs X ₃ Z←NR ₃

High Influence of Potassium Bromide on Thermal Decomposition of Ammonia Borane^†

The crystal structure of hexamethylenetetramine–borine C₆H₁₂N₄.BH₃