Temperature dependent Raman spectra of1ammonia ranging from 3150 cm−1to 3810 cm−12for combustion applications

The infrared and Raman spectra of trans-Δ3-penten-2-one have been measured over the temperature range +30° to −75° and +85° to +5° respectively. The temperature-dependent changes observed in the spectra indicate that this ketone exists as an equilibrium mixture of s-cis and s-trans conformational isomers in the liquid state. The s-trans form is the more stable and is present exclusively in the crystalline solid.Similar measurements have been carried out on Δ3-buten-2-one. The infrared and Raman spectra of this ketone also exhibit temperature effects that can be explained by a similar equilibrium, though the evidence is not as conclusive as for trans-Δ3-penten-2-one.The influence of alkyl substitution at the α- and β-carbon atoms on the relative stability of the s-cis and s-trans forms of α,β-unsaturated ketones is discussed.

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Temperature dependent Raman spectra of the ordered and disordered phases of Ag2HgI4 and Cu2HgI4

The Journal of Chemical Physics ◽

10.1063/1.435233 ◽

1977 ◽

Vol 67 (7) ◽

pp. 3189-3193 ◽

Cited By ~ 16

Author(s):

D. R. Greig ◽

G. C. Joy ◽

D. F. Shriver

Keyword(s):

Raman Spectra ◽

Temperature Dependent

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Temperature-dependent absorption lines observation in Raman spectra of SmFe3 (BO3 )4 ferroborate

Journal of Raman Spectroscopy ◽

10.1002/jrs.5430 ◽

2018 ◽

Vol 49 (10) ◽

pp. 1732-1735 ◽

Cited By ~ 2

Author(s):

Evgeniya Moshkina ◽

Irina Gudim ◽

Vladislav Temerov ◽

Alexander Krylov

Keyword(s):

Raman Spectra ◽

Absorption Lines ◽

Temperature Dependent ◽

Dependent Absorption

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Temperature-Dependent Raman Spectroscopic Study of the Double Molybdate KBi(MoO4)2

Materials ◽

10.3390/ma13235453 ◽

2020 ◽

Vol 13 (23) ◽

pp. 5453

Author(s):

Min Wang ◽

Changhao Wang ◽

Jian Wang ◽

Liming Lu ◽

Xiaoye Gong ◽

...

Keyword(s):

High Temperature ◽

Raman Spectra ◽

Monoclinic Phase ◽

Raman Band ◽

Vibrational Modes ◽

Temperature Dependent ◽

Raman Spectroscopic ◽

Thermal Stability Of ◽

Good Agreement

In situ high-temperature Raman spectra of polycrystalline KBi(MoO4)2 were recorded from room temperature to 1073 K. Thermal stability of the monoclinic KBi(MoO4)2 was examined by temperature-dependent XRD. The monoclinic phase transformed into the scheelite tetragonal structure at 833 K, and then to the monoclinic phase at 773 K. Quantum chemistry ab initio calculation was performed to simulate the Raman spectra of the structure of KBi(MoO4)2 high-temperature melt. The experimental Raman band at 1023 K was deconvoluted into seven Gaussian peaks, and the calculated results were in good agreement with the experimental data. Therefore, the vibrational modes of Raman peaks of molten KBi(MoO4)2 were assigned. It was confirmed that the isolated structure of [Bi(MoO4)2]− monomer, consisting of Mo6+ centers and Bi3+ sub-centers connected by edge-sharing, mainly exists in the melt of KBi(MoO4)2.

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