Tarif, Ejaj published the artcileDynamics at the non-ionic micelle/water interface: Impact of linkage substitution, Related Products of alcohols-buliding-blocks, the publication is Journal of Chemical Physics (2019), 151(15), 154902/1-154902/9, database is CAplus and MEDLINE.
The impact of atom substitution on the glycoside linkage bridging the head and the tail parts in a nonionic surfactant mol. on aqueous dynamics of the resultant micellar solutions has been explored, employing time-resolved fluorescence and dielec. relaxation (DR) measurements. We have utilized n-octyl-β-D-glucopyranoside (OG) and n-octyl-β-D-thioglucopyranoside (OTG) as nonionic surfactants where the oxygen atom in the glucopyranoside unit is substituted by a sulfur atom. The substitution impact is immediately reflected in the dynamic light scattering measurements of aqueous solutions where the estimated size of the OTG micelles is found to be approx. four times larger than the OG micelles. Steady state spectral features obtained by using a fluorescent probe solute, coumarin 153 (C153), in these micellar solutions are quite similar and indicate locations of the solute at the micelle/water interface for both the surfactants. Interestingly, significant differences in the rotational and solvation dynamics of C153 in these two micellar solutions have been registered. The corresponding DR measurements do not indicate any signature of relaxation typical of bound water. The absence of bound water is further supported by the differential scanning calorimetric measurements. However, the typical slow solvation time scale for aqueous micellar solutions has been observed for these surfactants. Fluctuations in the solute-interface interaction energy due to the solute motion has been argued to be the origin for this slow solvation component as DR measurements do not indicate the presence of qual. similar relaxation time scale in the medium. (c) 2019 American Institute of Physics.
Journal of Chemical Physics published new progress about 85618-21-9. 85618-21-9 belongs to alcohols-buliding-blocks, auxiliary class Tetrahydropyran,Chiral,sulfides,Alcohol, name is (2R,3S,4S,5R,6S)-2-(Hydroxymethyl)-6-(octylthio)tetrahydro-2H-pyran-3,4,5-triol, and the molecular formula is C6H8O3, Related Products of alcohols-buliding-blocks.
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