Conductometric Studies on Micellization of Cationic Surfactants in the Presence of Glycine

Pulikkal, Ajmal Koya; Wagay, Tariq Ahmad; Ismail, K.

doi:10.1007/s10953-014-0284-y

Cited by 27 publications

(12 citation statements)

References 31 publications

(32 reference statements)

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“…As opposed to the reported CMC values for pure CTAB and SDS, [ 44,47–49 ] the values of CMC for the CTAB + MNH and MNH + SDS systems in pure water were observed to be lower in magnitude. The CMC values for pure CTAB were reported as in the range of 0.99–1.23 mM at 303.15 K, [ 47,48,50 ] and the CMC for pure SDS at 303.1 K was of 8.10 mmol L −1 using conductivity technique.…”

Section: Resultscontrasting

confidence: 80%

Interaction of metformin hydrochloride with ionic surfactants in aqueous and NaCl solution: Effect of temperatures and compositions

Hoque

Alam

Khan

et al. 2020

J of Physical Organic Chem

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Herein, the interaction of metformin hydrochloride (MNH) with cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) has been investigated by the conductometric technique in aqueous medium as well as in the existence of NaCl over a range of temperatures. MNH, an antidiabetic drug that belongs to the biguanide group, is generally prescribed for the patients to manage type II diabetes. The micellar parameters such as critical micelle concentration (CMC), the extent of counterion binding (β), and different thermodynamic properties for MNH + surfactant systems were estimated and discussed elaborately. The CMC values of CTAB + MNH and SDS + MNH systems are dependent on the concentrations of NaCl at different temperatures. The significant decrease of CMC values in NaCl solution indicates that NaCl stabilizes MNH‐mediated surfactant micelles. The CMC values versus T plots show a nonlinear pattern for the CTAB + MNH system, whereas the CMC values almost monotonically decrease with increasing temperature for the SDS + MNH system. The values of ∆G0m were negative for both systems in all cases. Both ∆G0m and ∆G0m,t values indicate that the aggregation processes of MNH + surfactants mixture are spontaneous, which is also manifested in NaCl solution and with the change of temperatures in most of the cases. The obtained results proposed that surfactants may assist as a proficient drug delivery agent for antidiabetic drug, enhancing their bioavailability.

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Section: Resultscontrasting

confidence: 80%

Interaction of metformin hydrochloride with ionic surfactants in aqueous and NaCl solution: Effect of temperatures and compositions

Hoque

Alam

Khan

et al. 2020

J of Physical Organic Chem

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“…The observed cmc values of CTAB in the presence of aqueous ascorbic acid solution were found to be lower as compared to the cmc values of CTAB in pure water. The similar results have been observed and reported for CTAB in the presence of glycine (Koya et al 2015). The cmc of CTAB in water is decreased in the presence of ascorbic acid as it increases screening by means of electrostatic interaction between head groups (positively charged) of the surfactant molecules, in turn the micelle formation results at lower concentration with the energetically favorable aggregate structures.…”

Section: Role Of Ctabsupporting

confidence: 88%

Seedless synthesis and efficient recyclable catalytic activity of Ag@Fe nanocomposites towards methyl orange

et al. 2018

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This work demonstrates a competitive reduction method of synthesis of nanomaterials. In this method along cetyltrimethylammonium bromide (CTAB), the reduction of Ag + and Fe 3+ ions is achieved by ascorbic acid-to-bimetallic Ag@Fe yellowcolored nanomaterials. The shape of UV-visible spectra and wavelengths absorbed of Ag@Fe can be tuned from ca. 290-600 nm by controlling [CTAB] and [Ag + ]. The apparent first-order rate constants were calculated within the approximation of 6.1 × 10 −3 s −1 . The as-prepared Ag@Fe NPs have been found to be very important catalyst in terms of depredate methyl orange in vicinity of sodium borohydride (NaBH 4 ), which exhibits excellent efficiency and re-usability in the prototypical reaction. The cmc of cationic surfactant CTAB has been determined by conductivity method under different experimental conditions. In the presence of CTAB, Ag + and Fe 3+ ions reduce to Ag@Fe core/shell nanoparticles, comprehend a change in wavelength and intensity of SRP band. The apparent first-order rate constant, activation energy, and turnover frequency for the methyl orange reduction catalyzed by Ag@Fe NPs were found to be 1.6 × 10 −3 s −1 , 58.2 kJ mol −1 , and 1.1 × 10 −3 s −1 , respectively.

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“…The increase or decrease in the CMC values also depends on the various interactions operating between the monomers. In the presence of glycine, the equilibrium established between the water molecules and CPZ / CTAB changes, and as a result there are changes in the specific interactions: (i) ion‐zwitterion interactions between Br − /N + − CH 3 group of CTAB, + NH(CH 3 ) 2 /Cl − group of CPZ, and NH 3 + /COO − group of glycine or the repulsive interactions between the similarly charged species and; (ii) hydrophobic‐hydrophobic interactions between alkyl (R = C 16 H 33 ) chain of CTAB or hydrophobic tricyclic scaffolding of CPZ and hydrophobic, −CH 2 group of glycine (Koya et al, 2015). The increase in CMC values of CPZ may be due to an increase in repulsive interactions (type (i) predominates) between ions which oppose their association and thus disfavor the micellization process.…”

Section: Resultsmentioning

confidence: 99%

“…Glycine is a structure breaking amino acid (Koya et al, 2015) so its presence will decrease the solubility of hydrocarbon tail i.e ., alkyl (R = C 16 H 33 ) chain of CTAB and will cause an increase in the interfacial tension between the micelles and aqueous solvent. As a result, the micellization will be facilitated and there will be a decrease in the CMC of CTAB with respect to increase in concentration of glycine.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the micellization will be facilitated and there will be a decrease in the CMC of CTAB with respect to increase in concentration of glycine. Though, the aggregation behavior of CPZ and CTAB is different, but when they are mixed together, the formation of mixed micelles take place with contribution of both the components (Alam et al, 2007; Attwood and Florence, 1983; Koya et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

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Mixed Micellization Behavior of (Chlorpromazine Hydrochloride + Cetyltrimethylammonium Bromide) System in Aqueous Solutions of Glycine

Banipal

Sharma

Sohal

et al. 2021

J Surfact & Detergents

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We have examined the mixed micellar behavior of {amphiphilic drug; chlorpromazine hydrochloride (CPZ) + cationic surfactant; cetyltrimethylammonium bromide (CTAB)} at varying mole fractions of CPZ (αCPZ = 0.2, 0.4, 0.6, and 0.8) in (0.1, 0.3, and 0.5) mol kg−1 glycine(aq) solutions at 298.15, 308.15, and 318.15 K, by using conductometric, volumetric, isentropic compressibility, UV–visible absorbance, fluorescence, and dynamic light scattering (DLS) techniques. The critical micelle concentration (CMC) values obtained from above measurements have been utilized to calculate the thermodynamic parameters (ΔG°m, ΔH°m, and ΔS°m) and degree of ionization (α) at studied temperatures and concentrations. The partial specific volume (φv), partial specific isentropic compression (φκ), and isentropic compressibility (κs) have been calculated from the experimental density and speed of sound measurements and the results have been used to elucidate different interactions occurring in these systems. These results are further supported by UV–visible absorbance and fluorescence spectroscopic studies. The hydrodynamic diameters (Dh) of the mixed micellar system have been measured from the DLS studies. Thermodynamic and spectroscopic studies depict the dominance of hydrophobic/hydrophilic‐hydrophobic interactions between the alkyl (R = C16H33) chain of CTAB or hydrophobic tricyclic scaffolding of CPZ/Br−/N+‐CH3 group of CTAB or hydrophilic group i.e., tertiary amine portion of CPZ with hydrophobic group of glycine.

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Conductometric Studies on Micellization of Cationic Surfactants in the Presence of Glycine

Cited by 27 publications

References 31 publications

Interaction of metformin hydrochloride with ionic surfactants in aqueous and NaCl solution: Effect of temperatures and compositions

Interaction of metformin hydrochloride with ionic surfactants in aqueous and NaCl solution: Effect of temperatures and compositions

Seedless synthesis and efficient recyclable catalytic activity of Ag@Fe nanocomposites towards methyl orange

Mixed Micellization Behavior of (Chlorpromazine Hydrochloride + Cetyltrimethylammonium Bromide) System in Aqueous Solutions of Glycine

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