Infrared Spectra and Crystalline Phase Transitions of Ammonium Nitrate

Théorět, A.; Sándorfy, C.

doi:10.1139/v64-009

Cited by 102 publications

(63 citation statements)

References 15 publications

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“…Since the outer CsBr windows of the cell were also attacked by HNO, the acid was removed from the cell at about -50°C as the trinitrate complex decomposed. The spectra of NH,NO, and ND,N03 at 25 and -190°C were in agreement with the results of Theoret and Sandorfy (33).…”

Section: Nh3 -Hn03 Systor~supporting

confidence: 90%

Low-temperature infrared studies of some acid–base reactions

Huston¹,

Hisatsune²,

Heicklen³

1983

Can. J. Chem.

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Section: Nh3 -Hn03 Systor~supporting

confidence: 90%

Low-temperature infrared studies of some acid–base reactions

Huston¹,

Hisatsune²,

Heicklen³

1983

Can. J. Chem.

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“…The FT-IR spectrum of 1 shows characteristic vibrational bands of each of the ligated species [15][16][17][18], which is in good agreement with the crystal structure obtained at 120 K. The strong, broad absorption centered on 1382 cm -1 with three shoulders at 1359, 1341 and 1305 cm -1 can be assigned to asymmetric stretching vibration (ν 3 ) of the nitrate anions present. The local D 3h symmetry of the non-coordinated nitrate, means the strong absorption due to the out-of-plane ν 2 and in-plane ν 4 deformations are clearly visible at 847 and 726 cm -1 , respectively.…”

Section: Spectroscopic Characterizationsupporting

confidence: 84%

[Ni(1,10-phenanthroline)2(H2O)2](NO3)2: A Simple Coordination Complex with a Remarkably Complicated Structure that Simplifies on Heating

2011

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Despite the simple chemical formula, [Ni(1, cations and twelve nitrate anions. Detailed analyses of the crystal structure and O-H⋅⋅⋅O and C-H⋅⋅⋅O hydrogen bonding interactions are reported and discussed. In this way the anion-directed assembly of the 3-D structure is illustrated. The thermal and spectroscopic properties of the compound are described. Upon heating to 308 K, the crystal undergoes a phase change to a much simpler structure with a single [Ni(1, cation within the asymmetric unit and unit cell volume one sixth of that at low temperature. Although the crystal decomposed during data collection, it was possible to establish the molecular packing in the high temperature form and relate it to that at low temperature.

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“…At the same time, the vibration frequencies of the ammonium ion at around 3200 cm −1 , remain virtually unchanged in the mixture. Another remarkable change was the disappearance of the absorption peak at 1411 cm −1 , which is the N−H asymmetric deformation [43]. Thus, from the changes at 3058 cm −1 and 1411 cm −1 , we can conclude that when PF and PPA are added to AN, a new system of hydrogen bonds is formed.…”

Section: Ir Analysismentioning

confidence: 83%

Phase Stability of Ammonium Nitrate with Organic Potassium Salts

Wang

2016

Cent. Eur. J. Energ. Mater.

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Abstract:A study has been undertaken on the effect of additives on the phase transition of ammonium nitrate(V) (AN). Results obtained using Differential Scanning Calorimetry (DSC) showed that organic compounds and potassium salts of organic compounds have an effect on the phase transition behavior of AN. The samples were further analyzed using infrared (IR) and powder X-ray diffraction (XRD). The mechanism of phase stabilization of AN by compounds of this kind was examined. The present study showed that the influence of additives on the phase transition of AN occurs through the polar groups that are involved in intermolecular interactions of orbital and electrostatic types that form new hydrogen bonds. AN exists in only one phase in the temperature range from 30 °C to +100 °C, when a potassium salt of organic compounds was added. However, with organic compounds, the III→II phase transition was changed. IR and XRD of composites are characterized by new intermolecular interactions. Compacted samples of AN containing potassium salts of organic compounds exhibited better stability than AN containing organic compounds to multiple cyclic changes within a temperature range. This we named 'freezing and thawing analysis'. Additives have two functions on the AN phase transition. First, solid solutions of AN mixture were formed for K + replacement of NH4 + . Second, hydrogen bonds formed, which caused AN and salts of organic compounds to interact intimately

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Infrared Spectra and Crystalline Phase Transitions of Ammonium Nitrate

Abstract: The infrared spectra of solid crystalline films of amnlonium nitrate were measured a t temperatures ranging between the melting point (169" C) and liquid air temperature (-190' C). Four different spectra were obtained which are shown to belong t o phase

Cited by 102 publications

References 15 publications

Low-temperature infrared studies of some acid–base reactions

Low-temperature infrared studies of some acid–base reactions

[Ni(1,10-phenanthroline)2(H2O)2](NO3)2: A Simple Coordination Complex with a Remarkably Complicated Structure that Simplifies on Heating

Phase Stability of Ammonium Nitrate with Organic Potassium Salts

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