Thermodynamics of Micellization of n-Alkyltriphenylphosphonium Bromides: A Conductometric Study

Owoyomi, Olanrewaju; Ige, Jide

doi:10.4172/2150-3494.1000017

Cited by 10 publications

(8 citation statements)

References 24 publications

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“…p ) The molar heat capacity changes (∆ m C 0 p ) for micelle formation, is an important sign of protein structural changes in response to different ligands which is obtained from the slope of the plot of ∆H 0 m versus temperature (T) according to following equation [25,26]. …”

Section: Determination Of Molar Heat Capacity (∆ M Cmentioning

confidence: 99%

Effect of temperature and salts on the interaction of cetyltrimethylammonium bromide with ceftriaxone sodium trihydrate drug

Rahman

Khan

Rub

et al. 2016

Journal of Molecular Liquids

104

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Section: Determination Of Molar Heat Capacity (∆ M Cmentioning

confidence: 99%

Effect of temperature and salts on the interaction of cetyltrimethylammonium bromide with ceftriaxone sodium trihydrate drug

Rahman

Khan

Rub

et al. 2016

Journal of Molecular Liquids

104

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“…The change in molar heat capacity (

{∆ C}_{normalp, normalm}^{o}

) of micellization is an important tool to understand the structural changes of protein in response to diverse ligands and it can be attained from the slope of the scheme of

{∆ H}_{m}^{o}

against temperature ( T ) with the help of the succeeding relation (Hoque et al, , ; Owoyomi et al, ; Vamvaca et al, ):

{∆ C}_{normalp, normalm}^{o} = {(\frac{true}{\partial {∆ H}_{m}^{o}})}_{p}

…”

Section: Resultsmentioning

confidence: 99%

“…The change in molar heat capacity (ΔC o p,m ) of micellization is an important tool to understand the Fig. 3 A typical scheme of the second-order polynomial fitting graph of lnX cmc against T for pure TTAB in water (Hoque et al, , 2018aOwoyomi et al, 2011;Vamvaca et al, 2008):…”

Section: Thermodynamic Propertiesmentioning

confidence: 99%

Influence of Different Additives on the Interaction of Quinolone Antibiotic Drug with Surfactant: Conductivity and Cloud Point Measurement Study

Rahim

Mahbub

Islam

et al. 2019

J Surfact & Detergents

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Conductometric and cloud point (CP) measurement studies have been performed to investigate the interaction of tetradecyltrimethylammonium bromide (TTAB) and Triton® X‐100 (TX‐100) with ciprofloxacin hydrochloride (CFH) in different solvents over the temperature range of 295.15–315.15 K. CFH is used for the treatment of various bacterial infections. The observed critical micelle concentration (CMC) values of TTAB were found to be reduced in the presence of electrolytes (Na2SO4/Na3PO4), and this reduction proceeds with the elevation of salt concentration. The order of the CMC of TTAB follows the trend: cmcH2normalO > cmcNa3PO4 >cmcNa2SO4. The observed CMC values of TTAB were found to increase with increasing temperature and decrease with increasing concentration of CFH in aqueous medium. The values of Gibbs free energy of micellization (∆Gmo) for the TTAB/TTAB + CFH mixture were found to be negative, implying spontaneous micellization. The estimated CP of TX‐100 decreases with increasing concentration of TX‐100 in aqueous medium. The CP values first decrease with increasing concentration of CFH and then increase at higher concentration of CFH almost in all cases investigated. The values of free energy of clouding were found to be positive in all cases studied implying that phase separation of TX‐100 was nonspontaneous. The other thermodynamic parameters associated with the micellization of TTAB and the phase separation of TX‐100 were estimated and explained.

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“…The unique properties of cationic surfactants over other class of self-assembly [4] make them suitable in biological applications as solubilizing agents for organic compounds, and hydrophobic drugs, as disinfectants, and cleaning agents, also the positive charge on the surfaceactive segment of the molecule is also unaffected by the pH of the solution. [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Micellization and Interaction of Cationic Surfactants with Different Hydrophobic Group in Polar Organic Solvent

Olubunmi¹,

Olowu²,

Esan³

et al. 2020

AJPC

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Surfactants are amphiphilic compounds that are widely used in various technological fields and biological systems. In many of these applications, mixtures of amphiphiles in organic solvents are employed for better performance The work aims at establishing the extent of ideality or otherwise in the mixed micelles of n-alkyl trimethylammonium bromide, (n = 14 and 16 for TTABr and CTABr respectively), in water (AQ) and water-monoethanolamine (AQ-MEA) at different mole fractions (0.1 to 0.6) and temperatures by Conductance measurement.: The values of the critical micelle concentration (Cmx) obtained in AQ, and AQ-MEA were lower than that obtained assuming an ideal mixing system. Substantial deviation from ideality was observed in the presence of AQ-MEA at all temperatures, suggestive of more favourable association of the surfactants in MEA solvent. The composition (χ 1 ) of the mixed micelles obtained in the context of Rubingh's model showed that the micelles of CTABr were dominant, and the values of the interaction parameters (β mx ) were negative in AQ and AQ-MEA media with more synergistic interaction in the latter case at 0.1:0.9 mole fraction ratio at a particular temperature. The values of the activity coefficients (f TTABr , f CTABr ) were below unity, and the evaluation of the energetics of micellization showed that the process was spontaneous and feasible.

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Thermodynamics of Micellization of n-Alkyltriphenylphosphonium Bromides: A Conductometric Study

Cited by 10 publications

References 24 publications

Effect of temperature and salts on the interaction of cetyltrimethylammonium bromide with ceftriaxone sodium trihydrate drug

Effect of temperature and salts on the interaction of cetyltrimethylammonium bromide with ceftriaxone sodium trihydrate drug

Influence of Different Additives on the Interaction of Quinolone Antibiotic Drug with Surfactant: Conductivity and Cloud Point Measurement Study

Micellization and Interaction of Cationic Surfactants with Different Hydrophobic Group in Polar Organic Solvent

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