Chemical stability and electrochemical activity of xenon difluoride in propylene carbonate

Hirashige, Takayuki; Hagiwara, Rika; Ito, Yasuhiko

doi:10.1016/s0022-1139(00)00332-8

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…27 The other peaks observed in the spectra were assigned to Raman scattering from solvents and salts in the electrolyte solution. 36,37 A similar Raman spectrum was obtained immediately after a potential step to 1.5 V, as shown in Figure 1Aiv, while very significant changes were observed after storage at 1.5 V for 24 h; two peaks of D and D' bands newly appeared at around 1330 and 1620 cm −1 , respectively, as shown in Figure 1Av. 29 D and D' band peaks appear in the case of a finite crystal size and imperfections in the carbonaceous materials.…”

Section: Resultssupporting

confidence: 63%

In Situ Raman Study on Reversible Structural Changes of Graphite Negative-Electrodes at High Potentials in LiPF₆-Based Electrolyte Solution

Domi

Doi

Nakagawa

et al. 2016

J. Electrochem. Soc.

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Changes in the surface crystallinity of graphite negative-electrodes were investigated in a high potential region between 1.5 and 3 V vs. Li+/Li in LiPF6- and LiClO4-based electrolyte solution by in situ Raman spectroscopy using highly oriented pyrolytic graphite (HOPG) basal plane as a model electrode. The variation of Raman spectra suggested that some intercalation reactions and a decrease in the surface crystallinity of graphite occurred at a potential as high as 1.5 V vs. Li+/Li where Li+ is not intercalated into graphite. The Raman bands restored to their original states after the electrode potential was returned to 3.0 V. These changes repeatedly occurred in an almost reversible manner in the high potential region between 1.5 and 3 V. We focused on POF2OH, which was contained in the conventional LiPF6-based electrolyte solution as an impurity, and investigated the effects on the above structural changes to clarify the reaction mechanism. On the other hand, irreversible structural degradation of the graphite surface occurred at potentials below 1.0 V, where Li+ is intercalated into graphite, specifically in LiPF6-based electrolyte solution. These results indicate that PF6−-derived compounds should be deeply involved in the structural deterioration of graphite and surface film formation on it.

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Section: Resultssupporting

confidence: 63%

In Situ Raman Study on Reversible Structural Changes of Graphite Negative-Electrodes at High Potentials in LiPF₆-Based Electrolyte Solution

Domi

Doi

Nakagawa

et al. 2016

J. Electrochem. Soc.

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“…The dominating (84%) lower binding energy component belongs to fluorine bound to manganese, while the less-intense (16%) higher The Raman spectra of Mn-MOF-74 before and after exposure to XeF 2 vapors are presented in Figure 5 (for fullrange spectra at λ exc = 514.5 and 633 nm, see Figure S10 in the Supporting Information). No Raman modes of gaseous XeF 2 37,57,58 are observed, indicating that XeF 2 has reacted to fluorinate the framework. We observe three characteristic changes upon the fluorination: (1) The C−O stretching mode 29,36,43 is blue-shifted from 1275 to 1283 cm −1 by +8 cm −1 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Host–Guest Interactions in Metal–Organic Frameworks Doped with Acceptor Molecules as Revealed by Resonance Raman Spectroscopy

et al. 2020

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Metal–organic frameworks (MOFs) represent a class of porous materials whose properties can be altered by doping with redox-active molecules. Despite advanced properties such as enhanced electrical conduction that doped MOFs exhibit, understanding physical mechanisms remains challenging because of their heterogeneous nature hindering experimental observations of host–guest interactions. Here, we show a study of charge transfer between Mn-MOF-74 and electron acceptors, 7,7,8,8-tetracyanoquinodimethane (TCNQ) and XeF 2 , employing selective enhancement of Raman scattering of different moieties under various optical-resonance conditions. We identify Raman modes of molecular components and elucidate that TCNQ gets oxidized into dicyano- p -toluoyl cyanide (DCTC – ) while XeF 2 fluorinates the MOF upon infiltration. The framework’s linker in both cases acts as an electron donor as deduced from blue shifts of the C–O stretching mode accompanied by the emergence of a quinone-like mode. This work demonstrates a generally applicable methodology for investigating charge transfer in various donor–acceptor systems by means of resonance Raman spectroscopy.

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Noble Gases: Inorganic ChemistryBased in part on the article Noble Gases: Inorganic Chemistry by Boris Žemva which appeared in the Encyclopedia of Inorganic Chemistry, First Edition .

Atwood

2005

Encyclopedia of Inorganic Chemistry

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The noble gas (Ng) elements have a rich reaction chemistry despite having a filled valence shell that would indicate otherwise. Halide compounds, usually with fluorine, and various oxides are common. There is also a growing class of carbon and nitrogen derivatives. A wide range of neutral and cationic noble gas compounds can be formed as long as the added elements, or combinations of elements, possess sufficient electron affinity. The range of compounds, along with characterization data and brief bonding descriptions will be presented for each element. Many of the compounds serve as starting materials for other derivatives, including the rapidly growing field of noble gas containing transition metal complexes. For example, there is now a broad range of salts containing transition metals. The article will conclude with a brief overview of the many unusual and disparate applications being found for these elements.

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Chemical stability and electrochemical activity of xenon difluoride in propylene carbonate

Cited by 5 publications

References 19 publications

In Situ Raman Study on Reversible Structural Changes of Graphite Negative-Electrodes at High Potentials in LiPF₆-Based Electrolyte Solution

In Situ Raman Study on Reversible Structural Changes of Graphite Negative-Electrodes at High Potentials in LiPF₆-Based Electrolyte Solution

Host–Guest Interactions in Metal–Organic Frameworks Doped with Acceptor Molecules as Revealed by Resonance Raman Spectroscopy

Noble Gases: Inorganic ChemistryBased in part on the article Noble Gases: Inorganic Chemistry by Boris Žemva which appeared in the Encyclopedia of Inorganic Chemistry, First Edition .

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Chemical stability and electrochemical activity of xenon difluoride in propylene carbonate

Cited by 5 publications

References 19 publications

In Situ Raman Study on Reversible Structural Changes of Graphite Negative-Electrodes at High Potentials in LiPF6-Based Electrolyte Solution

In Situ Raman Study on Reversible Structural Changes of Graphite Negative-Electrodes at High Potentials in LiPF6-Based Electrolyte Solution

Host–Guest Interactions in Metal–Organic Frameworks Doped with Acceptor Molecules as Revealed by Resonance Raman Spectroscopy

Noble Gases: Inorganic ChemistryBased in part on the article Noble Gases: Inorganic Chemistry by Boris Žemva which appeared in the Encyclopedia of Inorganic Chemistry, First Edition .

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In Situ Raman Study on Reversible Structural Changes of Graphite Negative-Electrodes at High Potentials in LiPF₆-Based Electrolyte Solution

In Situ Raman Study on Reversible Structural Changes of Graphite Negative-Electrodes at High Potentials in LiPF₆-Based Electrolyte Solution