Cesium fluorohydrogenate, Cs(FH)2.3F

Matsumoto, Kazuhiko; Ohtsuki, Junya; Hagiwara, Rika; Matsubara, Seijiro

doi:10.1016/j.jfluchem.2006.04.009

Cited by 16 publications

(17 citation statements)

References 37 publications

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“…These results suggest that the coordination numbers of the fluorohydrogenate anion of (CH 3 ) 4 NF· m HF and (C 2 H 5 ) 4 NF· m HF are higher than those of (CH 3 ) 3 N· m HF and (C 2 H 5 ) 3 N· m HF in each m value, respectively. These results are in agreement with the results that a 19 F NMR signal for a stronger Lewis base EMIm(FH) 2.3 F is observed at higher magnetic field than that for a weaker base Cs(FH) 2.3 F . These results will be discussed together with the ionic conductivity and viscosity at the later section.…”

Section: Resultssupporting

confidence: 91%

Analysis of Cationic Structure in Some Room-Temperature Molten Fluorides and Dependence of Their Ionic Conductivity and Viscosity on Hydrofluoric Acid Concentration

et al. 2011

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To understand the ionic and nonionic species in (CH(3))(4)NF·mHF, (CH(3))(3)N·mHF, (C(2)H(5))(4)NF·mHF, and (C(2)H(5))(3)N·mHF melts, the structures of these melts were investigated by infrared spectroscopy, NMR, and high-energy X-ray diffraction. Infrared spectra revealed that three kinds of fluorohydrogenate anions, (FH)(n)F(-) (n = 1, 2, and 3), and molecular hydrofluoric acid (HF) are present in every melt. Ionic conductivity and viscosity of these melts were measured and correlated with their cationic structure. The ionic conductivity of the R(4)N(+)-systems was higher than that of corresponding R(3)NH(+)-systems because a strong N-H···F(HF)(n) interaction prevents the motion of R(3)NH(+) cations in the R(3)N·mHF melts. (CH(3))(4)N(+) and (CH(3))(3)NH(+) cations gave higher ionic conductivity than (C(2)H(5))(4)N(+) and (C(2)H(5))(3)NH(+) cations, respectively, because the ionic radii of former cations were smaller than those of latter. It was concluded that these effects on ionic conductivity can be explained by the cationic structure and the concentration of molecular HF in the melts.

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Section: Resultssupporting

confidence: 91%

Analysis of Cationic Structure in Some Room-Temperature Molten Fluorides and Dependence of Their Ionic Conductivity and Viscosity on Hydrofluoric Acid Concentration

et al. 2011

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“…[46,47] Results of the MALDI TOF mass spectra ( Figure 1) showed that the CsF supported synthesis method is suitable to achieve PAK without defects. As a consequence of this consideration, the CsF-catalyzed reaction of DFB with secondary aliphatic diamines in the melt has been shown to be successfully for the synthesis of molecularly perfect PAK.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Aromatic‐Aliphatic Aminoketone Polymers with Terminal Fluorine Groups

Anders

Schrepp

Kaßner

et al. 2010

Macro Chemistry & Physics

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A procedure for synthesis aromatic‐aliphatic PAK, completely functionalized with p‐fluorophenyl terminal groups, is presented. This synthesis uses the nucleophilic aromatic substitution of DFB with various secondary aliphatic diamines [CH3NH(CH2)mNHCH3] (m = 3, 6, and 8) and cesium fluoride as the base catalyst in the melt. The linearity and the complete functionalization of the PAK compounds with p‐fluorophenyl terminal groups are demonstrated with the aid of MALDI TOF mass spectrometry. PAK compounds are semi‐crystalline as shown by WAXS and DSC measurements. The degree of crystallinity ranges between 2 and 25%. Nucleophilic aromatic substitution reactions in the fluorine end groups are demonstrated by reaction of PAK (m = 6) with the strong S‐nucleophile mercaptoacetic acid.magnified image

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“…showing high ionic conductivity and low HF dissociation pressure in the CsF-2.3HF molten salt, [12] successive reports on this Cs system cannot be found. This could be attributed to the high cost of CsF that limits the practicality of the CsF-HF system.…”

Section: Introductionmentioning

confidence: 95%

Generation of Elemental Fluorine through the Electrolysis of Copper Difluoride at Room Temperature

et al. 2021

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The safe generation of F 2 gas at room temperature by using simple cell configurations has been the "holy grail" of fluorine researchf or centuries.T hus,t oa ddress this issue,w e report generation of F 2 gas through the electrolysis of CuF 2 in aCsF-2.45HF molten salt without the evolution of H 2 gas.The CuF 2 is selected through aseries of thermodynamic and kinetic assessments of possible metal fluorides.Anode assessments on graphite and glass-like carbon demonstrate the effect of the absence of the anode during generation of F 2 gas owingt o stabilized operations at room temperature.A lthough the Ni anode dissolves during electrolysis in the conventional medium-temperature cell, herein, it facilitates stable electrolysis over 100 h, achieving an F 2 gas purity of over 99 %w ith the potential to operate using one-compartment electrolysis.T his work presents asafe and propitious method for the generation of high-purity F 2 gas for small-scale lab and industrial applications.

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Cesium fluorohydrogenate, Cs(FH)2.3F

Cited by 16 publications

References 37 publications

Analysis of Cationic Structure in Some Room-Temperature Molten Fluorides and Dependence of Their Ionic Conductivity and Viscosity on Hydrofluoric Acid Concentration

Analysis of Cationic Structure in Some Room-Temperature Molten Fluorides and Dependence of Their Ionic Conductivity and Viscosity on Hydrofluoric Acid Concentration

Fabrication of Aromatic‐Aliphatic Aminoketone Polymers with Terminal Fluorine Groups

Generation of Elemental Fluorine through the Electrolysis of Copper Difluoride at Room Temperature

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