Infrared and Raman studies of pressure effects on the vibrational modes of solid CO2

Hanson, R. C.; Jones, Llewellyn H.

doi:10.1063/1.442183

Cited by 102 publications

(50 citation statements)

References 25 publications

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“…As it can be seen in Fig. 2, we are able to identify all the bending components of phase I reported at room pressure and low temperature with the only exception of the two weaker isotopic peaks due to 18 12 16 O C O and 18 13 16 O C O [15], thus achieving a relevant advance with respect to previous high pressure studies [16,17]. Specifically, we observe the two hot bands n n --2 and n n + -2 (624.3 and 752 cm -1 ), the 16 13 16 O C O isotopic peak (630.6 cm -1 ), and the four bending components, expected on the basis of symmetry requirements and LO-TO splitting: 645.6, 650.9, 654.7, and 687 cm -1 at 6 GPa.…”

Section: Resultsmentioning

confidence: 52%

“…By neglecting the dispersion of the n + and n -modes we summed their frequency values (by Refs. 16,22) to the measured IR absorption pattern of n 3 in the bulk sample under the assumption that the latter is partly resembling the corresponding density of states. With this procedure a good agreement, as the frequency dispersion is concerned, between the observed and calculated absorption pattern is found at any pressure.…”

Section: Resultsmentioning

confidence: 99%

“…The IR spectrum of this region has been extensively studied so far only in phase I [15,16,19]. In this phase the absorption spectrum consists basically of two narrow absorption peaks (see Fig.…”

Section: Resultsmentioning

confidence: 99%

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Infrared study of high-pressure molecular phases of carbon dioxide

Giordano

Gorelli²,

Bini

2006

Low Temperature Physics

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The infrared absorption spectra of the high-pressure crystalline phases II, III and IV of solid CO 2 were studied by using a resistive heated diamond anvil cell up to 30 GPa. The employment of crystal slabs having thickness of~2 mm allowed the study of the strongly absorbing fundamental bending and antisymmetric stretching modes without saturation. These are the first data for phases II and IV in the fundamental modes spectral region, furthermore the high samples quality allowed to improve, with respect to previous studies, the characterization of the infrared spectra of phases I and III. The comparison of the spectral structure and of the frequency evolution with pressure of the crystal modes between phase I and the higher pressure phases clearly indicates the close resemblance among all these phases. In particular, the dramatic change of the intermolecular interaction claimed for phases II (dimeric association) and IV (large molecular bending) can be ruled out and, as a consequence, the hypothesis of a transition from the molecular phase I to the silica-like phase V through intermediate nonmolecular phases discarded.

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Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

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Infrared study of high-pressure molecular phases of carbon dioxide

Giordano

Gorelli²,

Bini

2006

Low Temperature Physics

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“…26,27 Both phases I and III are stabilized by quadrupolar interactions between the linear molecules. 28 Other polymorphs have been synthesized, including a bent molecular-phase IV, 29 a polymeric phase V, 30 , 31 and a dimeric paired phase II (Figure 1).…”

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confidence: 99%

Thermal Carbon Dioxide Splitting: A Summary of the Peer-Reviewed Scientific Literature

Rayne

2008

Nat Prec

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Increasing concentrations of carbon dioxide (CO~2~) in the atmosphere have stimulated significant global research and development efforts regarding the reduction in CO~2~ emissions from all point and non-point sources. In addition to technologies that do not use carbon feedstocks or which capture and "permanently" store CO~2~ (i.e., sequestration), there is considerable worldwide interest among the academic, industrial, and government communities regarding methods for dissociating waste stream carbon dioxide molecules into their constituent carbon and oxygen ("CO~2~ splitting") atoms as a final "end-of-pipe" treatment option. The splitting of carbon dioxide has also been actively discussed and researched in the space exploration and extraterrestrial colonization programs for several decades. This document summarizes the peer-reviewed open source scientific literature regarding thermal methods for carbon dioxide splitting.

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mentioning

confidence: 99%

Carbon Dioxide Splitting: A Summary of the Peer-Reviewed Scientific Literature

Rayne

2008

Nat Prec

View full text Add to dashboard Cite

Increasing concentrations of carbon dioxide (CO2) in the atmosphere have stimulated significant global research and development efforts regarding the reduction in CO2 emissions from all point and non-point sources. In addition to technologies that do not use carbon feedstocks or which capture and "permanently" store CO2 (i.e., sequestration), there is considerable worldwide interest among the academic, industrial, and government communities regarding methods for dissociating waste stream carbon dioxide molecules into their constituent carbon and oxygen ("CO2 splitting") atoms as a final "end-of-pipe" treatment option. The splitting of carbon dioxide has also been actively discussed and researched in the space exploration and extraterrestrial colonization programs for several decades. This document summarizes the peer-reviewed open source scientific literature regarding carbon dioxide splitting.

show abstract

Infrared and Raman studies of pressure effects on the vibrational modes of solid CO2

Cited by 102 publications

References 25 publications

Infrared study of high-pressure molecular phases of carbon dioxide

Infrared study of high-pressure molecular phases of carbon dioxide

Thermal Carbon Dioxide Splitting: A Summary of the Peer-Reviewed Scientific Literature

Carbon Dioxide Splitting: A Summary of the Peer-Reviewed Scientific Literature

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