Pressure and temperature dependence of Raman scattering and optical absorption in crystalline S4N4

Iqbal, Zafar; Downs, D. S.; Christoe, C. W.

doi:10.1016/0022-3697(77)90101-9

Cited by 8 publications

(5 citation statements)

References 12 publications

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“…From the symmetry coordinates given below (Table 4) it can be seen that one of the A x modes (v 3 ) must be the symmetric SS stretching vibration. In agreement with earlier authors [18,20] the Raman line at 218 cm -1 of solid S 4 N 4 is assigned to this fundamental since it does not shift on 15 …”

Section: »'8 + Fllsupporting

confidence: 87%

“…The B 2 mode can therefore be assigned to the Raman line at 200 cm -1 of solid S 4 N 4 which in solution is observed at 177 cm -1 . This line is also unaffected by 15 N substitution and splits into a doublet a low temperatures [18,20]. The A u and B u components of this mode occur in the i.r.…”

Section: »'8 + Fllmentioning

confidence: 95%

“…The 4 molecules in the unit cell occupy general positions. The consequences of this situation for the vibrational spectra of solid S 4 N 4 have been discussed in great detail by Zallen and Slade [18] as well as by Iqbal, Downs and Christoe [20].…”

Section: Vibrational Spectra and Assignmentmentioning

confidence: 96%

See 2 more Smart Citations

Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S₄N₄ [1]

Steudel

1981

Zeitschrift Für Naturforschung A

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Infrared and Raman spectra of solid and dissolved S4 14 Ni and of solid S 4 15 N 4 have been recorded and assigned in accordance with the molecular point group D2d. 22 of the 28 fundamental vibrations of both molecules have been identified and used to calculate force constants applying a modified Urey-Bradley force field with 9 independent constants. Good agreement between observed and calculated wavenumbers was obtained, and both Urey-Bradley and valence force constants are given. The results indicate that-S4N4 basically contains eight SN single bonds and two extremely weak SS bonds.

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Section: »'8 + Fllsupporting

confidence: 87%

Section: »'8 + Fllmentioning

confidence: 95%

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Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S₄N₄ [1]

Steudel

1981

Zeitschrift Für Naturforschung A

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“…At low temperature the underlying n(N)‐σ*(S−S) transition (λ max =410 nm) is symmetry forbidden and hence is of low intensity at low temperature. It gains, however, intensity with increasing temperature by vibronic coupling [44] …”

Section: Resultsmentioning

confidence: 99%

“…have suggested that the number of “doorway modes” (

\overset{ν}{true}

=200–700 cm −1 ) detected in Raman spectroscopy can be taken as a relative measure of impact sensitivity of an energetic compound [59] . With 16 modes [32,44,60] S 4 N 4 ranks in the same ballpark as TNT, C 7 H 5 N 3 O 6 , (15 J) and hence could indeed be less impact sensitive than generally assumed.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Explosive Properties of Tetrasulfur Tetranitride, S₄N₄

Koch¹,

Sućeska

2021

Zeitschrift anorg allge chemie

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The explosive properties of tetrasulfur tetranitride, S4N4, are reviewed and analysed. S4N4 is an explosive compound with an impact sensitivity comparable to pentaerythritol tetranitrate (PETN) (Ei=4 J) but a friction sensitivity equal or even lower than lead azide (F=0.1–1 N). S4N4 has primary explosive properties. It has a working capacity greater than silver azide, AgN3, and is capable to initiate TNT. S4N4 shows an unusual non‐linear density/detonation velocity relationship which is due to different stability regimes of sulfur species present in the Chapman Jouguet zone. S4N4 is stable, non‐ageing, non‐toxic, insoluble in water and hence an interesting candidate for future lead tricinate replacement.

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Chemical Reactivity of Tetrasulfur Tetranitride: Synthesis, Physical Properties, and Structural Characterization of the Amorphous Phase Cu₇S₄N₄

Irsen

Kroll

Dronskowski

et al. 2003

Zeitschrift anorg allge chemie

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Tetrasulfur tetranitride, S4N4, reacts with elemental Cu within inert solvents to a black‐blue material of approximate composition Cu7S4N4 which is totally amorphous to X‐rays and which cannot be made crystalline by either thermal treatment or electron radiation. Cu7S4N4 explodes if heated above 234 °C or when subjected to mechanical shock to eventually yield copper(I) sulfide; this together with the characteristic infrared spectrum of Cu7S4N4 indicates the presence of molecular S4N4 units inside the amorphous phase. The metastable nature of Cu7S4N4 is also mirrored by electron microscopy which furthermore allows the structural characterization of its degradation products. Based on experimental EXAFS data offering characteristic Cu—N and Cu—S distances, a theoretical crystalline approximant of Cu7S4N4 was suggested and structurally optimized by density‐functional total‐energy calculations including periodic boundary conditions. This model incorporates a central S4N4 unit bonded to three shells of Cu atoms of different functionalities; in addition, a partial rupture of the S4N4 unit is likely to allow for a lowering of the total energy of the metastable phase. The latter observation supports the impossibility to make Cu7S4N4 crystallize using 4N4 crystallize using whatever kind of measures.

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Pressure and temperature dependence of Raman scattering and optical absorption in crystalline S4N4

Cited by 8 publications

References 12 publications

Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S₄N₄ [1]

Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S₄N₄ [1]

Analysis of the Explosive Properties of Tetrasulfur Tetranitride, S₄N₄

Chemical Reactivity of Tetrasulfur Tetranitride: Synthesis, Physical Properties, and Structural Characterization of the Amorphous Phase Cu₇S₄N₄

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Pressure and temperature dependence of Raman scattering and optical absorption in crystalline S4N4

Cited by 8 publications

References 12 publications

Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S4N4 [1]

Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S4N4 [1]

Analysis of the Explosive Properties of Tetrasulfur Tetranitride, S4N4

Chemical Reactivity of Tetrasulfur Tetranitride: Synthesis, Physical Properties, and Structural Characterization of the Amorphous Phase Cu7S4N4

Contact Info

Product

Resources

About

Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S₄N₄ [1]

Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S₄N₄ [1]

Analysis of the Explosive Properties of Tetrasulfur Tetranitride, S₄N₄

Chemical Reactivity of Tetrasulfur Tetranitride: Synthesis, Physical Properties, and Structural Characterization of the Amorphous Phase Cu₇S₄N₄