Raman spectrum of propylene carbonate

Janz, George J.; Ambrose, John F.; Coutts, J. W.; Downey, Jason

doi:10.1016/0584-8539(79)80181-6

Cited by 68 publications

(63 citation statements)

References 13 publications

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“…Our Raman and IR spectra of pure PC agreed well with those reported by Janz et al, 4 indicating that the distilled product was sufficiently pure and appropriate for the spectroscopic study in this work. The salt LiTFSI was kindly provided by 3 M and used without further treatment.…”

Section: Methodssupporting

confidence: 81%

“…This band is in fact superimposed on the 1805 cm 1 band, a combination of the symmetric ring breath (850 cm 1 ) and the carbonate symmetric stretch (959 cm 1 ) according to Janz et al 4 The broadening of the carbonyl stretching band in the Raman (see Fig. 1) and IR spectra demonstrates the influence of the addition of the salt.…”

Section: Ion Association Between LI + and Solventmentioning

confidence: 99%

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Spectroscopic studies on interactions and microstructures in propylene carbonate—LiTFSI electrolytes

Wang

Gao

Huang

et al. 2001

J Raman Spectroscopy

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Interactions between propylene carbonate (PC) and lithium bis(trifluoromethane sulfone imide) [LiTFSI, LiN(CF 3 SO 2 ) 2 ] were studied by Fourier transform (FT) Raman and IR spectroscopy. It was found that PC interacts with the Li + ions and the TFSI − anions through its skeletal oxygen atoms, leading to solventseparated ion pairs and contact ion pairs in the solution by way of the nitrogen atoms on the anion.

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Section: Methodssupporting

confidence: 81%

Section: Ion Association Between LI + and Solventmentioning

confidence: 99%

Spectroscopic studies on interactions and microstructures in propylene carbonate—LiTFSI electrolytes

Wang

Gao

Huang

et al. 2001

J Raman Spectroscopy

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“…The observed IR and Raman spectra of PC are shown in Figure 2. The PC molecule belongs to the Cl point group, and most Raman bands were polarized as previously found by Janz et al 15 Characteristic vibrational frequencies were the C-H stretches in the Raman, the C-H bendings in the IR, the C -0 stretch in the IR, and the ring deformations in the IR and Raman spectra. Notably, the calculated value for the symmetric ring bending mode was 708 cm-1.…”

Section: Resultsmentioning

confidence: 67%

Vibrational studies of lithium perchlorate in propylene carbonate solutions

Battisti¹,

Nazri²,

Klassen³

et al. 1993

J. Phys. Chem.

195

169

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Raman and infrared spectroscopic studies and conductivity and viscosity measurements of propylene carbonate (PC) doped with various concentrations of lithium perchlorate are reported. The assignment of the vibrational modes was supplemented by AM1 normal coordinate analysis. Both Raman and infrared spectra showed band splitting in the fundamental vibrational frequencies of PC and perchlorate anion. Spectral curve fitting within the totally symmetric perchlorate band shape showed contributions of free ion, solvent-shared ion pairs, and contact ion pairs. Strong Li+-PC interaction was observed for the PC ring deformation band at 712 cm-l. Ion pairing as deduced by spectroscopic techniques provided a rationale to account for conductivity and viscosity data.

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“…17 Yeager and co-workers6 Ðrst reported the ionic solvation of the lithium cation (Li`) in propylene carbonate (PC) using infrared (IR) and proton magnetic resonance (PMR) techniques. Janz et al 7 investigated Raman spectra of PC solutions that dissolve lithium perchlorate and assigned each (LiCO 4 /PC), frequency to the vibrational mode of PC. Hyodo and Okabayashi12,13 analyzed, by Raman spectroscopy, the electrolyte system of ethylene carbonate (EC) that dissolves and reported quantitative results on the Li`solvaLiClO 4 , tion in this system.…”

Section: Introductionmentioning

confidence: 99%

A Raman spectroscopic study of organic electrolyte solutions based on binary solvent systems of ethylene carbonate with low viscosity solvents which dissolve different lithium salts

Morita¹,

Asai²,

Yoshimoto³

et al. 1998

Faraday Trans.

210

197

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The ionic structure of organic electrolyte solutions has been investigated, by means of Raman spectroscopy for mixed aprotic solvents that dissolve lithium salts. The solutions consisted of binary solvent systems of a high permittivity solvent (ethylene carbonate, EC) mixed with low viscosity alkyl carbonates (dimethyl carbonate, DMC, and diethyl carbonate, DEC) or a linear alkyl ether (1,2-dimethoxyethane, DME) and of LiCF 3 SO 3 , and as the solute. The Raman shifts based on the solvents varied with the sort of) 2 dissolved lithium salts and their concentration. The ion solvation was estimated from the side-bands of the Raman scattering for the CwO stretch of single bonds of the carbonate groups and for the symmetric ring deformation of EC. The number of EC molecules interacting with the lithium cation (Li`) was higher than that of DMC in a mixed EC ] DMC (50 : 50 by volume) system. The apparent solvation number of Li`in 1.5 mol dm~3 solution was about 2.8 in EC ] DMC, whereas that in 1.5 M solution was LiCF 3 SO 3 LiPF 6 about 3.9. SpeciÐc solvation of Li`was distinguished in EC ] DME (50 : 50), where DME predominantly coordinates to Li`. However, it was also conÐrmed that EC, which has a lower donicity, interacts with Liè ven in the EC ] DME system. That is, the solvation number of EC in remained LiCF 3 SO 3 /(EC ] DME) ca. 1.0 even in high salt concentrations.

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Raman spectrum of propylene carbonate

Cited by 68 publications

References 13 publications

Spectroscopic studies on interactions and microstructures in propylene carbonate—LiTFSI electrolytes

Spectroscopic studies on interactions and microstructures in propylene carbonate—LiTFSI electrolytes

Vibrational studies of lithium perchlorate in propylene carbonate solutions

A Raman spectroscopic study of organic electrolyte solutions based on binary solvent systems of ethylene carbonate with low viscosity solvents which dissolve different lithium salts

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