Raman spectroscopic study of aqueous LiX and CaX2 solutions (X = Cl, Br, and I) in the glassy state

Kanno, H.; Hiraishi, Jiro

doi:10.1021/j100242a019

Cited by 62 publications

(39 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Instead, an intenisty of the Raman peak centered at ∼3440 cm −1 is appreciable. This band is mainly due to the OH stretching vibrations of water molecules weakly hydrogen bonded to halide ions [27] [28]. Interestingly, in contrary to the results of quaternary ammonium-type ionic liquids, the multiple glass transition behavior was not observed and the system shows only one T g throughout the whole concentration range.…”

Section: Raman Spectracontrasting

confidence: 58%

Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid: N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H₂O Mixtures

Yoshimura

Hatano

Imai

et al. 2012

Journal of Thermodynamics

View full text Add to dashboard Cite

By a simple differential thermal analysis (DTA) system, the concentration dependence of the glass transition temperatures (T g s) for the quaternary ammonium-type ionic liquid, N, N-diethyl-N-methyl-N-(2-methoxyethyl) O mixtures basically show one-T g behavior and the T g decreases monotonically with increasing H 2 O content up to around x = 91.5. But it suddenly jumps to higher T g value at a specific x =∼ 92. At this very limited point, two T g s (T g1 , T g2 ) which we might consider as a transition state from the structure belonging to the T g1 group to another one due to the T g2 group were observed. These results clearly reflect the difference in the anionic effects among Br

show abstract

Section: Raman Spectracontrasting

confidence: 58%

Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid: N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H₂O Mixtures

Yoshimura

Hatano

Imai

et al. 2012

Journal of Thermodynamics

View full text Add to dashboard Cite

show abstract

“…Instead, a relatively lower intensity of the Raman peak centred at around wave number 3440 cm À1 is appreciable. This band is due to the contribution from the OH stretching vibrations of the water molecules hydrated to iodide ions [20]. The results suggest that the interactions between water molecules and the anions are significantly different in the two RTILs; the anionwater interaction in the [DEME][I] solution is much stronger than that in the [DE-ME][BF 4 ] solution.…”

Section: (A) Shows a Comparison Of The Raman Ch And Oh Stretching Spementioning

confidence: 90%

Glass transition behaviour of the quaternary ammonium type ionic liquid, {[DEME][I]+H2O} mixtures

Imai

Abe

Matsumoto

et al. 2011

The Journal of Chemical Thermodynamics

View full text Add to dashboard Cite

“…The enhancement results from a preresonance Raman effect involving electronic states associated with charge transfer from the halide ion to the water molecules forming the inner-sphere hydration shell [47]. The relatively large size and polarizing effect of the I À ion causes major disruption of the hydrogen-bonded networks in water and leads to the formation of aquo-complex ions in which up to six water molecules form an inner-sphere hydration shell around each anion via hydrogen-bonding interactions represented by: OHÁ Á ÁI À [48]. The interaction between undissociated HI and water in concentrated HI solutions is likely also to involve hydrogen bond formation except in this case it is the HI which acts as the donor: H 2 OÁ Á ÁHI.…”

Section: Concentrated Solutions Of Halogen Acids or Halide Ions Espementioning

confidence: 99%

Raman scattering studies of the condensed phase of the HIx feed of the sulfur-iodine thermochemical cycle

Ramos-Sánchez

Jeans

Devonshire

2011

Int. J. Energy Res.

View full text Add to dashboard Cite

SUMMARYThe species present in the condensed phase of the HI x , hydrogen producing, feed in the water-splitting, sulfur-iodine thermochemical cycle have been investigated using spontaneous Raman scattering. Measurements of I 2 -containing species in the low Raman-shift region from 50 to 400 cm À1 in samples of the two aqueous binary systems, I 2 /H 2 O and HI/H 2 O, and the ternary system HI/I 2 /H 2 O with and without the addition of H 2 SO 4 have provided a consistent picture of the aqueous iodine and polyiodide chemistry. Samples were contained in sealed silica ampoules and were heated to temperatures in the range 20-3001C. The results, which cover a wide range of I 2 and HI mole fractions, and x I2 =x HI mole ratios, in the HI/I 2 /H 2 O system, reveal the co-occurrence of, and H 1 -I À (I 2 ) 2 solvated species in the condensed phase of HI x . Thus, while the first is mostly evident by its strong fundamental band with Raman shift in the range from 110 to 115 cm À1, the other two species appear convoluted in a broad prominent band whose Raman shift ranges between 153 and 172 cm À1 depending on the x I2 =x HI mole ratio. These well characterized Raman features are proposed as an in situ diagnostic for process control of the cycle.

show abstract

Raman spectroscopic study of aqueous LiX and CaX2 solutions (X = Cl, Br, and I) in the glassy state

Cited by 62 publications

References 4 publications

Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid: N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H₂O Mixtures

Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid: N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H₂O Mixtures

Glass transition behaviour of the quaternary ammonium type ionic liquid, {[DEME][I]+H2O} mixtures

Raman scattering studies of the condensed phase of the HIx feed of the sulfur-iodine thermochemical cycle

Contact Info

Product

Resources

About

Raman spectroscopic study of aqueous LiX and CaX2 solutions (X = Cl, Br, and I) in the glassy state

Cited by 62 publications

References 4 publications

Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid: N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H2O Mixtures

Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid: N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H2O Mixtures

Glass transition behaviour of the quaternary ammonium type ionic liquid, {[DEME][I]+H2O} mixtures

Raman scattering studies of the condensed phase of the HIx feed of the sulfur-iodine thermochemical cycle

Contact Info

Product

Resources

About

Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid: N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H₂O Mixtures

Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid: N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H₂O Mixtures