Infra-red spectra of some organic sulphur-oxygen compounds

Detoni, S.; Hadži, D.

doi:10.1016/s0371-1951(56)80102-1

Cited by 63 publications

(23 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also the higher mean S=O frequency of P (1321 cm-I) compared to diinethylsulphate (1290 em-') (1 3) and dicyclohexylsulphone (1221 crn-I) (14) values reflects well the general dependence of S=O frequencies upon the electronegativitp of substituents in XYSO, compounds (12). The S=O force constant (k = 10.96 dyn/cm), which may be obtained (13) In agreement with the infrared data the nmr spectrum of the equimolar solution may well represent that of pure dicyclohexanecarbonylsulphate in liquid SO2. It was found that the proton chemical shifts in the system are strongly dependent on the mole ratio; in Fig.…”

Section: Formation and Characterizatiotz Of Dicyclohexatzecarbo~zylsusupporting

confidence: 55%

Dicyclohexanecarbonylsulphate: a precursor of cyclohexyloxocarbenium ions

Montoneri¹,

Giuffré²,

Cassago³

et al. 1977

Can. J. Chem.

View full text Add to dashboard Cite

show abstract

Section: Formation and Characterizatiotz Of Dicyclohexatzecarbo~zylsusupporting

confidence: 55%

Dicyclohexanecarbonylsulphate: a precursor of cyclohexyloxocarbenium ions

Montoneri¹,

Giuffré²,

Cassago³

et al. 1977

Can. J. Chem.

View full text Add to dashboard Cite

show abstract

“…29 An additional peak at 1350 cm-' also appears, this being the antisymmetric vibration of diarylsulfone, 30 the "sulfone bridge. "…”

Section: ( C ) and ( D ) 2 ( B ) -( D ) And 3 ( C ) And ( D ) ] Pmentioning

confidence: 99%

Sulfonation of cross‐linked asymmetric membranes based on polystyrene and divinylbenzene

Byun

Burford

Fane

1994

J of Applied Polymer Sci

View full text Add to dashboard Cite

SYNOPSISAsymmetric microporous membranes based on polystyrene cross-linked with divinyl benzene were prepared. They were sulfonated with sulfonic acid and washed with solutions of gradually increasing p H to reduce environmental shock. The sulfonation was monitored by infrared spectroscopy, and changes in wettability and sulfur content were also recorded. Morphologies and reverse osmosis performance of sulfonated membranes were measured, with both water flux and salt rejection increasing after treatment.

show abstract

“…The SO 2 stretch was visualised as a well resolved peak at 1040 cm 1 . 15 All spectra were obtained from the wrist area of the tested individual.…”

Section: Fourier-transform Raman Spectroscopymentioning

confidence: 99%

In vivo fluorescence excitation spectroscopy and in vivo Fourier‐transform Raman spectroscopy in human skin: evidence of H₂O₂ oxidation of epidermal albumin in patients with vitiligo

Rokos

Moore

Hasse

et al. 2004

J Raman Spectroscopy

View full text Add to dashboard Cite

Both fluorescence excitation spectroscopy and Fourier-transform Raman spectroscopy have been utilised to study in vivoH 2 O 2 -mediated oxidative stress in the depigmented epidermis of untreated patients with vitiligo by following the oxidation of disulfide bridges in human epidermal albumin and the fluorescence maxima of the tryptophan residue in position 214 of this protein. In normal healthy skin, the single tryptophan in albumin fluoresces with a l max at 295 nm which is in agreement with high concentrations (10 −3 M) of this protein. Fluorescence analysis of the depigmented epidermis of untreated patients with vitiligo revealed three distinct patient groups: (a) one with a peak at a l max of 280 nm (b) one with l max in the range 300-305 nm and (c) one with three peaks with excitation maxima in the region of a l max of 280, 290 and 300 nm. The peak at a l max of 280 nm was in agreement with low albumin concentrations. Epidermal H 2 O 2 concentrations in the mM range, as previously documented in untreated vitiligo, were followed with in vivo FT-Raman spectroscopy using the O -O stretch at 875 cm −1 . Here, we were able to assign the SO 2 stretch at 1040 cm −1 to cysteic acid, which was the expected peroxidation product of the disulfide bridges in albumin. Using human albumin we confirmed the oxidation of disulfide bridges as well as the concentration dependent fluorescence excitation maxima for Trp 214 in this protein. The removal of epidermal H 2 O 2 from the patients skin with a pseudocatalase (PC-KUS) yielded the loss of the O -O stretch at 875 cm −1 together with the loss of the SO 2 stretch at 1040 cm −1 in the Raman spectrum and a shift of the l max from 300-305 nm to 290/280 nm was observed in the fluorescence analysis. These new in vivo results add more evidence to the central role for H 2 O 2 -mediated oxidative stress in the pathomechanism of vitiligo.

show abstract

Infra-red spectra of some organic sulphur-oxygen compounds

Cited by 63 publications

References 11 publications

Dicyclohexanecarbonylsulphate: a precursor of cyclohexyloxocarbenium ions

Dicyclohexanecarbonylsulphate: a precursor of cyclohexyloxocarbenium ions

Sulfonation of cross‐linked asymmetric membranes based on polystyrene and divinylbenzene

In vivo fluorescence excitation spectroscopy and in vivo Fourier‐transform Raman spectroscopy in human skin: evidence of H₂O₂ oxidation of epidermal albumin in patients with vitiligo

Contact Info

Product

Resources

About

Infra-red spectra of some organic sulphur-oxygen compounds

Cited by 63 publications

References 11 publications

Dicyclohexanecarbonylsulphate: a precursor of cyclohexyloxocarbenium ions

Dicyclohexanecarbonylsulphate: a precursor of cyclohexyloxocarbenium ions

Sulfonation of cross‐linked asymmetric membranes based on polystyrene and divinylbenzene

In vivo fluorescence excitation spectroscopy and in vivo Fourier‐transform Raman spectroscopy in human skin: evidence of H2O2 oxidation of epidermal albumin in patients with vitiligo

Contact Info

Product

Resources

About

In vivo fluorescence excitation spectroscopy and in vivo Fourier‐transform Raman spectroscopy in human skin: evidence of H₂O₂ oxidation of epidermal albumin in patients with vitiligo