Mixed micellization study of ibuprofen (sodium salt) and cationic surfactant (conventional as well as gemini)

Kumar, Dileep; Rub, Malik Abdul; Azum, Naved; Asiri, Abdullah M.

doi:10.1002/poc.3730

Cited by 145 publications

(44 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The values of excess free energy of micellization (Δ G ex ) expound the nonideality of the mixed micellization between the studied amphiphiles . The values of Δ G ex were estimated from the known value of micellar mole fraction and activity coefficient of the components considering different proposed model (Rubingh's [∆ G ex Rub ], Motomura's [∆ G ex M ], as well as Rodenas's [∆ G ex Rod ]) utilizing the subsequent equation:

normalΔ G_{ex}^{Rub} = italicRT ([], X_{1}^{Rub} ln f_{1}^{Rub} + ((), 1 - X_{1}^{Rub}) ln f_{2}^{Rub})

normalΔ G_{ex}^{M} = italicRT ([], X_{1}^{M} ln f_{1}^{M} + ((), 1 - X_{1}^{M}) ln f_{2}^{M})

normalΔ G_{ex}^{Rod} = italicRT ([], X_{1}^{Rod} ln f_{1}^{Rod} + ((), 1 - X_{1}^{Rod}) ln f_{2}^{Rod})

…”

Section: Resultsmentioning

confidence: 99%

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Mahbub

Rub

Hoque

et al. 2018

J of Physical Organic Chem

Self Cite

View full text Add to dashboard Cite

The behavior of mixed micelle formation between two cationic surfactants‐dodecyltrimethylammonium chloride (DTAC) and cetyltrimethylammonium bromide (CTAB) in absence/attendance of urea has been investigated by means of conductivity measurements over temperature range of 298.15 to 318.15 K. Lower magnitudes of the critical micelle concentration from their ideal values imply the strong interaction between the studied amphiphiles. The micellar mole fraction (X1) on the basis of the different proposed model (Rubingh, Motomura & Rodenas) and the ideal micellar mole fraction (Xid) were evaluated, and estimated results imply the high contribution of CTAB in the mixed micelle formation that enhances with the augment of the mole fraction of the CTAB. The values of activity coefficients (f1 and f2) (less than unity) and negative values of the interaction parameter (β) in all cases signify the attractive interaction between the amphiphiles studied. Spontaneous mixed micelle formation between the studied amphiphiles (dodecyltrimethylammonium chloride and CTAB) was indicated by the negative magnitudes of free energy of micellization (ΔGm0). The negative values of excess free energy of micellization (ΔGex) indicate the higher stability of the mixed micelle compared with the single micelle. The standard enthalpy change of micellization (ΔHm0) and standard entropy change of micellization (ΔSm0) were also calculated and discussed.

show abstract

normalΔ G_{ex}^{Rub} = italicRT ([], X_{1}^{Rub} ln f_{1}^{Rub} + ((), 1 - X_{1}^{Rub}) ln f_{2}^{Rub})

normalΔ G_{ex}^{M} = italicRT ([], X_{1}^{M} ln f_{1}^{M} + ((), 1 - X_{1}^{M}) ln f_{2}^{M})

normalΔ G_{ex}^{Rod} = italicRT ([], X_{1}^{Rod} ln f_{1}^{Rod} + ((), 1 - X_{1}^{Rod}) ln f_{2}^{Rod})

…”

Section: Resultsmentioning

confidence: 99%

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Mahbub

Rub

Hoque

et al. 2018

J of Physical Organic Chem

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, investigations of [Zn (II)‐Trp] + and ninhydrin could be utilized as a simple and reliable kinetic probe in aggregated structural systems. The investigation may also be performed in the presence of gemini surfactant micelles as well as mixed surfactant systems for the enhanced utility of technique/method.…”

Section: Discussionmentioning

confidence: 99%

Kinetic and mechanistic investigations of [Zn (II)‐Trp]⁺ and ninhydrin in aqueous and cationic CTAB surfactant

Kumar

Rub

2019

J of Physical Organic Chem

Self Cite

View full text Add to dashboard Cite

Kinetic and mechanistic investigations of [Zn (II)‐Trp]+ and ninhydrin in aqueous and cationic cetyltrimethylammonium bromide (CTAB) surfactant have been executed in CH3COOH‐CH3COONa buffers of pH 5.0. Spectrophotometric as well as conductometric techniques were employed to carry out the study at experimental temperature. The values of rate constant (kobs in aqueous and kψ in CTAB surfactant) and binding parameters (KB for [Zn (II)‐Trp]+ and KN for ninhydrin) have been determined by the means of a computer program referred to as linear least squares technique. Fractional‐ and first‐order kinetics were found in ninhydrin and [Zn (II)‐Trp]+, respectively, in aqueous and cationic CTAB. Study was catalyzed and accelerated by CTAB surfactant. An increase in CTAB surfactant concentration from 0 to 45 mmol kg−1 resulted to an increase in kψ from 2.5 × 10−5 s−1 to 22.7 × 10−5 s−1. Surfactant concentration beyond 45 mmol kg−1 had a slow decreasing effect in kψ. In order to elucidate CTAB effect on kψ, a pseudo‐phase model of micelles was applied.

show abstract

“…Furthermore, geminis exhibit advanced aggregation features and unusual wetting power capacity [13][14][15] . Due to their distinctive quality, they are employed for several purposes, such as household things, cleaning, pharmacy, cosmetics, gene therapy, in micellar catalysis and so on [16][17][18][19][20][21] .…”

mentioning

confidence: 99%

Kinetic study of the metal-dipeptide complex with ninhydrin facilitated by gemini (m-s-m) surfactant micelles

Azum

Kumar

2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

the three Gemini (m-s-m; m (head group) = 16 and s (spacer) = 4, 5, 6) surfactants have been synthesized and their impact on reaction of zinc(ii)-glycylleucine complex ([Zn(ii)-Gly-Leu] +) and ninhydrin were studied at temperature (343 K) and pH (5.0) using spectroscopic method. Influence of several factors, viz., [Zn(II)-Gly-Leu] + , [ninhydrin], temperature and pH were also carried out on title reaction in geminis. Rates of reaction are the first-order path in concentration of [Zn(II)-Gly-Leu] + complex and fractional order path in concentration of ninhydrin. The catalysis of gemini 16-s-16 surfactant micelles was investigated below and above their critical micelle concentration (cmc) value and detailed elaboration were provided in the text. In the present case, rate constants, k ψ , increased on increasing geminis ([gemini] are below their cmc, region I) and stayed nearly constant (region II). The shape of (region I and II) surfactants ([gemini] = 0 to 400 × 10 −5 mol dm −3) are similar to a cetyltrimethylammonium bromide, CTAB (single hydrophilic head group and hydrophobic part). Later, a sharp increment in rate was observed with higher [gemini] (region III, (Fig. 5). The study was catalyzed and accelerated quite enough by geminis (at concentrations below their cmc) compared to aqueous. An appropriate mechanism has been proposed for accounting for the distribution of reactants between aqueous and micellar pseudo phases. Resulting kinetic data were used to determine the binding constants of micelle-substrate (K B) and micelle-ninhydrin (K nin).

show abstract

Mixed micellization study of ibuprofen (sodium salt) and cationic surfactant (conventional as well as gemini)

Cited by 145 publications

References 60 publications

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Kinetic and mechanistic investigations of [Zn (II)‐Trp]⁺ and ninhydrin in aqueous and cationic CTAB surfactant

Kinetic study of the metal-dipeptide complex with ninhydrin facilitated by gemini (m-s-m) surfactant micelles

Contact Info

Product

Resources

About

Mixed micellization study of ibuprofen (sodium salt) and cationic surfactant (conventional as well as gemini)

Cited by 145 publications

References 60 publications

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Kinetic and mechanistic investigations of [Zn (II)‐Trp]+ and ninhydrin in aqueous and cationic CTAB surfactant

Kinetic study of the metal-dipeptide complex with ninhydrin facilitated by gemini (m-s-m) surfactant micelles

Contact Info

Product

Resources

About

Kinetic and mechanistic investigations of [Zn (II)‐Trp]⁺ and ninhydrin in aqueous and cationic CTAB surfactant