Solution Properties of Gemini Surfactant of Decanediyl-1-10-bis (dimethyltetradecylammonium bromide) in Aqueous Medium

Nakahara, Hiromichi; Hasegawa, Atsuko; Uehara, Seina; Akisada, Hideo; Shibata, Osamu

doi:10.5650/jos.62.905

Cited by 7 publications

(7 citation statements)

References 38 publications

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“…As seen in Figure 2, the d H values for the micellar aggregate in the absence of n-alkylbenzenes is ∼5 nm at 2.0 mmol dm −3 14-10-14,2Br − regardless of the temperature variation. The micellar aggregation number of 14-10-14,2Br − determined previously by the steady-state fluorescence quenching method is 11 ± 1 at 288.2−308.2 K. 34 On the other hand, the aggregates including the nalkylbenzene becomes considerably larger in d H . At 288.2 K (Figure 2A), the d H values range roughly from 100 to 300 nm at 2.0 mmol dm −3 irrespective of the alkyl chain length of the solubilizates and become more than 20 times longer compared to that of the mother micelles just in water.…”

Section: Cryogenic Transmission Electron Microscopy (Cryo-tem)mentioning

confidence: 77%

“…14-10-14,2Br – ) was synthesized via the procedure reported previously . Detailed information on the purification and identification for 14-10-14,2Br – was described elsewhere . Benzene (>99.5%), toluene (99.5%), ethylbenzene (>99.0%), n -propylbenzene (>99.0%), and n -butylbenzene (>99.0%) were purchased from Tokyo Chemical Industry Co., Ltd. (Tokyo, Japan).…”

Section: Methodsmentioning

confidence: 99%

“…21 Detailed information on the purification and identification for 14-10-14,2Br − was described elsewhere. 34 Benzene (>99.5%), toluene (99.5%), ethylbenzene (>99.0%), n-propylbenzene (>99.0%), and n-butylbenzene (>99.0%) were purchased from Tokyo Chemical Industry Co., Ltd. (Tokyo, Japan). n-Pentylbenzene (99.0%) was bought from Aldrich (MO, USA).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…In the present study, we report the solubilization of nalkylbenzenes such as benzene, toluene, ethylbenzene, npropylbenzene, n-butylbenzene, and n-pentylbenzene into 14-10-14,2Br − micelles, which have previously been characterized in the aqueous medium. 34 The solubilization has been performed in the temperature range from 288.2 to 308.2 K with an interval of 10 K in order to clarify the effects of the benzene rings and of alkyl chain lengths of n-alkylbenzenes on the thermodynamic parameters of solubilization. In addition, the size variation of the solubilized micelles or aggregates is elucidated in terms of hydrodynamic diameters derived from dynamic light scattering.…”

Section: ■ Introductionmentioning

confidence: 99%

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Solubilization of n-Alkylbenzenes into Gemini Surfactant Micelles in Aqueous Medium

et al. 2014

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Solubilization of benzene, toluene, ethylbenzene, n-propylbenzene, n-butylbenzene, and n-pentylbenzene into micelles of decanediyl-1-10-bis(dimethyltetradecylammonium bromide) (14-10-14,2Br(-)) has been investigated in the temperature range from 288.2 to 308.2 K. The equilibrium concentrations of all the solubilizates are determined spectrophotometrically. The concentration of the solubilizates remains constant below the critical micelle concentration (cmc) and increases linearly with an increase in 14-10-14,2Br(-) concentration above the cmc. Compared to the mother micelle, the solubilized micelles indicate much larger hydrodynamic diameters, which are determined by dynamic light scattering. Therefore, the Gibbs energy change for the solubilization of n-alkylbenzenes has been evaluated by the partitioning of the solubilizates between the aqueous and micellar phases. Furthermore, the enthalpy and entropy changes for the solubilization could be calculated from temperature dependence of the Gibbs energy change. From the thermodynamic parameters, it is found that the solubilization for the present system is entropy-driven and that the location of the solubilizates moves into the inner core of the micelle with an elongation of their alkyl chains. The movement on the location is also supported by the results of absorption spectra, Fourier transform infrared (FTIR) spectra, and two-dimensional nuclear Overhauser effect spectroscopy (2-D NOESY).

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Section: Cryogenic Transmission Electron Microscopy (Cryo-tem)mentioning

confidence: 77%

Section: Methodsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Solubilization of n-Alkylbenzenes into Gemini Surfactant Micelles in Aqueous Medium

et al. 2014

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“…Surfactants are amphiphilic compounds that possess both hydrophilic (water‐loving) and hydrophobic (water‐hating) parts in the same compound as well as an equal solubility property in polar and nonpolar solvents. [ 1–8 ] In both aqueous and nonaqueous media, surfactants can be able to form an aggregate at a certain concentration. The concentration at which the aggregation commences is known as critical micelle concentration ( CMC ), and the aggregate is termed as a micelle.…”

Section: Introductionmentioning

confidence: 99%

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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Interfacial behavior of gemini surfactants with different spacer lengths in aqueous medium

et al. 2019

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Solution Properties of Gemini Surfactant of Decanediyl-1-10-bis (dimethyltetradecylammonium bromide) in Aqueous Medium

Cited by 7 publications

References 38 publications

Solubilization of n-Alkylbenzenes into Gemini Surfactant Micelles in Aqueous Medium

Solubilization of n-Alkylbenzenes into Gemini Surfactant Micelles in Aqueous Medium

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

Interfacial behavior of gemini surfactants with different spacer lengths in aqueous medium

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