7320-45-8

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InChI:InChI=1/C8H14O7S/c1-3-14-7(9)5-6(16(11,12)13)8(10)15-4-2/h6H,3-5H2,1-2H3,(H,11,12,13)

Upstream product

• 141-05-9 Diethyl maleate 

Relevant academic research and scientific papers

Role of the succinate skeleton in the disorder-order transition of AOT and its analogous molecules: Detection by infrared absorption spectra of the configurations arising from the difference in torsion angles of the succinate skeleton

The IR spectra in the 13001450 cm-1 region, which reflect the CH and CH2 deformation vibrational modes of the succinate skeleton, have been investigated in detail for sodium dialkylsulfonates (alkyl groups: Ethyl, n-propyl, n-butyl, n-hexyl, n-heptyl, n-octyl, n-decyl, and n-dodecyl) and sodium 1,2-bis(2-ethylhexyl)sulfosuccinate (sodium 1,2-bis(2- ethylhexyloxycarbonyl)ethanesulfonate) (AOT). The results have provided clear evidence that two configurations, arising from the difference in the torsion angles of the succinate skeleton, are preferentially stabilized in aqueous solution as well as in the solid state, depending upon the concentration. Thus, the IR spectra of this region can be used as a powerful tool for elucidation of the mechanism of the disorderorder transition in aggregate systems of AOT or its homologs at the molecular level.

Raman and IR spectroscopic studies of the interaction between counterion and polar group in self-assembled systems of AOT-homologous 'sodium dialkyl sulfosuccinates'

Headgroup-counterion interactions have been studied for a homologous series of sodium dialkyl sulfosuccinates (SDAS) with propyl, butyl, hexyl, octyl, decyl, undecyl and dodecyl chains as Aerosol-OT analogues. Raman scattering and IR absorption spectra were recorded and compared with those for dimethyl sulfosuccinate monohydrate, diethyl sulfosuccinate trihydrate and diheptyl sulfosuccinate dihydrate, whose crystal structures are known. The spectral features of the C=O and SO3- stretch modes directly reflect the interaction between the polar group and the Na+ ion and depend strongly upon the environment of hydration. The results may be summarized as follows. For the SDAS monohydrates in the solid state, there exists a strong interaction between the β C=O group and the Na+ ion, as a consequence of coordination of the β C=O to the Na+ ion, resulting in splitting of the C=O stretch modes. In particular, the common Raman (IR) bands observed at 1705- 1707 (1706-1708) and 1730-1732 (1732-1733) cm-1 may be assigned to the β C=O group coordinated to the Na+ counterion and the hydrated α C=O group, respectively. The extent of splitting of these bands is a measure of the strength of this C=O···Na+ interaction. Coordination of the β C=O to the Na+ ion also affects the C=O deformation modes of the O-C=O linkage. An increased hydration number and longer hydrocarbon chains induce a weak interaction between the C=O group and the Na+ ion. The SO3-···Na6+ interaction reflects the SO3- stretch modes, depending upon the extent of hydration. Furthermore, for the SDAS samples in the organic and aqueous microphases, Raman (IR) bands characteristic of the C=O and SO3-1 groups have been used successfully to account for the interaction between the polar group and the Na+ ion.

Crystal structures of sodium dimethyl sulfosuccinate and sodium diethyl sulfosuccinate

The crystal structures of sodium dimethyl sulfosuccinate and sodium diethyl sulfosuccinate have been determined by the single crystal X-ray diffraction method. Sodium dimethyl sulfosuccinate (SDMS, C6H9O7SNa·H2O, Mr = 266.20) crystallizes in a triclinic space group P1 with unit cell dimensions a = 5.5971 (8), b = 6.5388 (5), c = 15.267 (2) A, α = 77.855 (8), β = 85.90 (1), γ = 84.95 (1)°. The crystal of sodium diethyl sulfosuccinate (SDES, C8H13O7SNa·3H2O, Mr = 330.29) has a monoclinic space group C2/c with unit cell dimensions a = 34.754 (3), b = 6.0322 (7), c = 15.0777 (9) A, β = 104.385 (7)°. In the SDMS and SDES crystals, the Na+ ion, which is coordinated to six oxygen atoms, forms an octahedral structure. For SDMS, the Na+ ion is coordinated to four oxygen atoms of SO3/- groups and to the two oxygen atoms of water molecules of hydration. For SDES, the Na+ ion is coordinated to the oxygen atom of the β-chain C=O group, one of the SO3/- oxygen atoms and four oxygen atoms of hydrating water molecules. It was found that splitting of the C=O stretch band caused by the Na...O=C coordination occurs in the IR and Raman spectra of SDES.