Effect of Ascorbic Acid on the Colloidal and Micellar Properties of Anionic, Cationic, and Nonionic Surfactants: Conductivity, Volumetric, Viscometric, and Fluorescence Study

Harutyunyan, Lusine; Lachinyan, Martina L.; Harutyunyan, Romik S.

doi:10.1021/je400667c

Cited by 17 publications

(7 citation statements)

References 32 publications

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“…As reported in the literature, ionic–hydrophilic interactions between the ionic head groups −N + (CH 3 ) 3 of surfactants and the polar sites (−OH, −CO and −O−) of l -ascorbic acid make l -ascorbic acid interacts strongly with the micellar system. Thus, when added into the CTAC solution, l -ascorbic acid distributes around the surface of CTAC micelles. − The DLS measurement confirms that the size of micelles is slightly increased after adding l -ascorbic acid (Figure S7a). With the addition of Bi 3+ precursor solution, Bi 3+ may form metastable complex intermediates with l -ascorbic acid due to the coordination ability of l -ascorbic acid, and similar complexes have been reported .…”

Section: Resultsmentioning

confidence: 71%

Non-centrosymmetric Hollow BiOCl Nanocaps with Tailored Openings for the Photocatalytic Degradation of Rhodamine B

Zhang

Zhao

Huang

et al. 2022

ACS Appl. Nano Mater.

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Micelles of surfactants have been employed as a powerful tool for the synthesis of hollow nanostructures. Nonetheless, it is still challenging to use micelles to direct the growth of hollow nanostructures with open interiors, especially for crystalline materials. Herein, we report a versatile method to precisely synthesize non-centrosymmetric hollow BiOCl nanocaps with open interiors for the first time. The growth mechanism of the hollow BiOCl nanocaps is elucidated, and the openings of BiOCl nanocaps can be precisely controlled by fine tuning their growth conditions. The non-centrosymmetric BiOCl nanocaps yield a pseudo-first-order degradation kinetic rate constant of up to 0.1217 min −1 in the photodegradation of rhodamine-B, 7.8 times higher than that of common BiOCl nanoplates. This suggests that BiOCl nanocaps show excellent photocatalytic performance to degrade colored rhodamine B. Furthermore, the BiOCl nanocaps can be also extended in the photodegradation of colorless contaminants in industrial wastewater. More importantly, the micelle-directed growth strategy can be generalized to synthesize noncentrosymmetric BiOCl 0.5 Br 0.5 and BiOBr hollow nanocaps. This synthetic strategy heralds a paradigm for designing noncentrosymmetric hollow nanostructures with micelles and may open up an avenue for unique hollow nanomaterials with tailorable structures and properties.

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Section: Resultsmentioning

confidence: 71%

Non-centrosymmetric Hollow BiOCl Nanocaps with Tailored Openings for the Photocatalytic Degradation of Rhodamine B

Zhang

Zhao

Huang

et al. 2022

ACS Appl. Nano Mater.

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“…ʟ-Ascorbic acid acts simultaneously as a cosolvent and as a structure-breaking solute, which lowers the hydrophobic effect in the micellar solutions, hence resulting in the enhancement of the CMC values of the surfactants. This gets support from the fact (Afrin et al, 2013;Harutyunyan et al, 1980Harutyunyan et al, , 2013Jones and Talley, 1933) that the water structure breakers cause the salting-in of the nonpolar groups of the monomeric form of amphiphiles and as a result the CMC values of the surfactants get elevated.…”

Section: Resultsmentioning

confidence: 86%

“…ʟ‐Ascorbic acid is a renowned antioxidant, free radical scavenger, improves the eye's capability, and hinders the development of advanced age correlating the muscular degeneration (Drach et al, ; Roy et al, ). The systems containing surfactants and ʟ‐ascorbic acid may act as models for understanding the interactions and action mechanisms in multicomponent biological systems (Harutyunyan et al, ).…”

Section: Introductionmentioning

confidence: 99%

Elucidation of Interactions between l‐Ascorbic Acid and Mixed Micellar Aggregates of Catanionic {Sodium Dodecylsulfate + Cetyltrimethylammonium Bromide} Surfactants via Physicochemical and Spectroscopic Studies

Banipal

Sohal

Arti

et al. 2019

J Surfact & Detergents

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Surfactant micelles mimic the microenvironment present in biological systems and can act as a medium for antioxidant studies. Moreover, the thermodynamic profile of micellization and spectroscopic studies provides very good information about interactions in these systems. Thus, the mixed micellar behavior of sodium dodecylsulfate (SDS) and cetyltrimethylammonium bromide (CTAB) at varying mole fractions of SDS was studied in (0.01, 0.02, and 0.03) mol kg−1 ʟ‐ascorbic acid(aq) solutions with the aid of various techniques viz., conductivity, density and sound velocity, and spectroscopy. From the CMC values of the mixed surfactants, the degree of ionization (β) and thermodynamic parameters (normalΔGm°, normalΔHm°, and normalΔSm°) were evaluated at 298.15, 308.15, and 318.15 K. The UV absorption spectra were recorded in (1–3) × 10−4 mol kg−1 ʟ‐ascorbic acid(aq) solutions at various mole fractions of SDS. The proton (1H) NMR spectra of mixed (SDS + CTAB) surfactants were studied in (0.01–0.03) mol kg−1 ʟ‐ascorbic acid solutions. Hydrodynamic diameters (Dh) of mixed micellar aggregates were obtained from the dynamic light scattering (DLS) studies. The present studies suggest the predominance of ionic‐hydrophilic interactions between the ionic head groups {O‐SO3− or N+ (CH3)3} of surfactants and the polar (–OH, –C=O and –O–) sites of ʟ‐ascorbic acid.

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“…Several compounds such as ascorbic acid did not fit in the picture: its log P decreased until the CMC was reached and then increased to a value superior to its initial value (Table S2). This behaviour reflects the ability of ascorbic acid to destabilise micelles and to act as a solvent 17,18 . Molecules of too high or too low lipophilicity did not lend themselves to reliable log P measurements with our method and could not be incorporated into this model.…”

Section: Resultsmentioning

confidence: 92%

Traditional Chinese medicine: saponins, critical micellar concentrations and partition coefficients

Barthel

Massiot

Lavaud

2023

Phytochemical Analysis

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Introduction: Traditional Chinese medicine (TCM) revolves around complex mixtures bound to specific roles within the formulation, among which saponin-containing plants with alleged properties of harmonising or detoxifying other compounds present in the preparations.Objective: This article deals with the study of these interactions with, as a model, the interaction between saponins and selected active principles. Methods:The measurement of the partition coefficient between water and octanol (logP) was used as an indicator and determined by nuclear magnetic resonance (NMR) for these active principles in the presence of saponins. For each compound, a graph was constructed showing the evolution of logP with increasing concentrations of saponins.Results: Four distinct patterns of interactions were distinguished. Pattern A showed a constant decrease of logP, pattern B showed a decrease followed by a plateau, in pattern C the logP did not vary until the critical micellar concentration (CMC) and decreased afterwards, and pattern D exhibited an increase of logP. These properties were linked to the ability of saponins to form micelles in water once the CMC is reached. The interaction of aconitine and saponins followed pattern D, thus explaining the detoxification of herbal preparations using Aconitum with licorice. The licorice facilitated the extraction of the notoriously water-insoluble artemisinin from Artemisia annua. Conclusion:This investigation confirms that the physical properties of micelle forming saponins are intimately linked to a modification of behaviour of the other molecules in solution, as seen with the alteration of logP and the four types of interactions presented.

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Effect of Ascorbic Acid on the Colloidal and Micellar Properties of Anionic, Cationic, and Nonionic Surfactants: Conductivity, Volumetric, Viscometric, and Fluorescence Study

Cited by 17 publications

References 32 publications

Non-centrosymmetric Hollow BiOCl Nanocaps with Tailored Openings for the Photocatalytic Degradation of Rhodamine B

Non-centrosymmetric Hollow BiOCl Nanocaps with Tailored Openings for the Photocatalytic Degradation of Rhodamine B

Elucidation of Interactions between l‐Ascorbic Acid and Mixed Micellar Aggregates of Catanionic {Sodium Dodecylsulfate + Cetyltrimethylammonium Bromide} Surfactants via Physicochemical and Spectroscopic Studies

Traditional Chinese medicine: saponins, critical micellar concentrations and partition coefficients

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