Mixed micelles of sodium 4-decyl naphthalene sulfonate with Triton X-100 and sodium dodecyl sulfonate analyzed by 1H NMR

Yang, Xiao Yan; Tan, Xiao Li; Cheng, Gongzhen; Yuan, Huijuan; Mao, Shizhen; Zhao, Suoqi; Yu, Jia; Du, You

doi:10.1016/j.jcis.2004.06.091

Cited by 9 publications

(5 citation statements)

References 30 publications

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“…NOESY SpectrasStructure Investigation of Mixed TX100/SDP2S/SL61 Micelles in the Presence of AlCl 3 . In order to get a better insight into the origin of the higher oil solubilization capacity of mixed surfactant composition, 2D NOESY spectra 33,34,[39][40][41][42] were recorded for the TX100/SDP2S, TX100/SL61 and TX100/SDP2S/SL61 systems in the presence of AlCl 3 , with the aim to determine the mutual arrangement of surfactant molecules in the mixed micelles. Compositions with equal molar fractions of the two surfactants were selected.…”

Section: Mixed Tx100/sdp2smentioning

confidence: 99%

Mixed Micelles of Triton X-100, Sodium Dodecyl Dioxyethylene Sulfate, and Synperonic L61 Investigated by NOESY and Diffusion Ordered NMR Spectroscopy

2009

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Mixed micelles formed from nonionic surfactant Triton X-100 (TX100), anionic surfactant sodium dodecyl dioxyethylene sulfate (SDP2S), and triblock copolymer Synperonic L61 (SL61) were investigated by 1H NMR spectroscopy. The size and shape of the aggregates were determined by diffusion ordered NMR spectroscopy (DOSY), while 2D nuclear Overhauser enhanced spectroscopy (NOESY) NMR was used to study the mutual spatial arrangement of the surfactant molecules in the aggregated state. An average micellar hydrodynamic radius of 3.6 nm, slightly increasing upon increasing TX100 molar fraction, was found for the mixed systems without additives. Addition of SL61 to the mixed micellar systems results in a slight increase of micellar radii. In the presence of AlCl3, an increase of TX100/SDP2S micellar sizes from 4 to 10 nm was found when increasing the SDP2S molar fraction. The mixed TX100/SDP2S micelles in the presence of both AlCl3 and polymer SL61 are almost spherical, with a radius of 4.5 nm. 2D NOESY data reveal that, as the individual TX100 micelles, mixed TX100/SDP2S and TX100/SDP2S/SL61/AlCl3 micelles also have a multilayer structure, with partially overlapping internal and external layers of TX100 molecules. In these mixed micelles, the SDP2S molecules are located at the level of the external layer of TX100 molecules, whereas the SL61 polymer is partially incorporated inside of the micellar core.

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Section: Mixed Tx100/sdp2smentioning

confidence: 99%

Mixed Micelles of Triton X-100, Sodium Dodecyl Dioxyethylene Sulfate, and Synperonic L61 Investigated by NOESY and Diffusion Ordered NMR Spectroscopy

2009

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“…Nuclear magnetic resonance (NMR) spectroscopy can provide information on the localization of a solubilizate within a surfactant micelle since NMR chemical shift depend on the molecular environment of the nuclei. [25][26][27][28][29][30][31] Proton NMR spectroscopy is a particularly useful tool to investigate solubilization processes since 1 H is an abundant but sensitive nucleus that allows for the differentiation of molecules in heterogeneous mixtures. For example, 1 H NMR spectroscopy has have been used to elucidate the predominant solubilization site of eugenol in SDS micelles and authors reported very sharp and well-resolved NMR signals of eugenol and other aromatic compounds in SDS micelles with particularly large upfield shifts of the surfactant methylene groups upon inclusion of aromatic compounds carrying a phenolic hydroxyl group.…”

Section: Structural Changes In Micelles Upon Inclusion Of Antimicrobialmentioning

confidence: 99%

Formulation and Characterization of Phytophenol-Carrying Antimicrobial Microemulsions

et al. 2007

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Phytophenols were solubilized in nonionic surfactant micelles to form antimicrobially active and thermodynamically stable microemulsions. Formulation of phytophenols in microemulsions has previously been shown to improve their antimicrobial activity in model microbiological and food systems. Carvacrol and eugenol were incorporated in micellar solutions of two nonionic surfactants (Surfynol® 485W and Surfynol® 465) by mixing at room temperature. Particle size of formed microemulsions was determined by dynamic light scattering, and structural information about the mixed micellar system was obtained by nuclear magnetic resonance spectroscopy (NMR). Uptake of carvacrol and eugenol in surfactant micelles as determined by ultrasonic velocity measurements was very rapid, e.g., below the maximum additive concentration, the phytophenols were completely solubilized in the micelles in less than 30 min. Depending on the surfactant-phytophenol combination, the self-assembled surfactant-phytophenol aggregates had mean particle diameters between 3 and 17 nm. Elucidation of the structure of aggregates by 1H NMR studies indicated that micelles had a "bracket-like" structure with phytophenols being located inside the palisade layer of the micelle in direct contact with adjacent surfactant monomers. Encapsulation of phytophenols in surfactant micelles enables the incorporation of large amounts of hydrophobic antimicrobials in aqueous phases. Formulation of antimicrobial microemulsions may thus offer a means to deliver high concentrations of phytophenols to the bacterial surfaces of foodborne pathogens to affect kill.

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“…5b). The cross peaks can be interpreted as a result of both intra-and intermolecular interactions between the respective fragments [17][18][19][20][21]26,27], as shown in Fig. 4.…”

Section: Nuclear Overhauser Effect Measurementsmentioning

confidence: 99%

Study of reverse micelles of di-isobutylphenoxyethoxyethyldimethylbenzylammonium methacrylate in benzene by nuclear magnetic resonance spectroscopy

Emin

Denkova

Papazova

et al. 2007

Journal of Colloid and Interface Science

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Mixed micelles of sodium 4-decyl naphthalene sulfonate with Triton X-100 and sodium dodecyl sulfonate analyzed by 1H NMR

Cited by 9 publications

References 30 publications

Mixed Micelles of Triton X-100, Sodium Dodecyl Dioxyethylene Sulfate, and Synperonic L61 Investigated by NOESY and Diffusion Ordered NMR Spectroscopy

Mixed Micelles of Triton X-100, Sodium Dodecyl Dioxyethylene Sulfate, and Synperonic L61 Investigated by NOESY and Diffusion Ordered NMR Spectroscopy

Formulation and Characterization of Phytophenol-Carrying Antimicrobial Microemulsions

Study of reverse micelles of di-isobutylphenoxyethoxyethyldimethylbenzylammonium methacrylate in benzene by nuclear magnetic resonance spectroscopy

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