Effect of short chain length alcohols on micellization behavior of cationic gemini and monomeric surfactants

Kumar, Birendra; Ghosh, Kallol K.; Quagliotto, Pierluigi

doi:10.1016/j.molliq.2012.05.013

Cited by 59 publications

(29 citation statements)

References 61 publications

(43 reference statements)

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“…The micellization behavior can be modifying or affected by solvent properties. Significant contributions in this field are made by Ghosh and their coworkers [38] as they studied the effects of short chain alcohols upon the micellization of cationic surfactant and observed that the cmc values increases with increasing length of alcohol from methanol to ethanol and decreases slowly with 1-propanol. The decrease in cmc on addition of methanol and ethanol is due to the increase in solvation power of the surfactant-alcohol mixture.…”

Section: Hydrolysis Of Paraoxon By Oha − In Cationic Micellar Mediamentioning

confidence: 99%

Influence of octanohydroxamic acid on the association behavior of cationic surfactants: Hydrolytic cleavage of phosphate ester

Satnami

Dewangan

Kandpal

et al. 2016

Journal of Molecular Liquids

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Section: Hydrolysis Of Paraoxon By Oha − In Cationic Micellar Mediamentioning

confidence: 99%

Influence of octanohydroxamic acid on the association behavior of cationic surfactants: Hydrolytic cleavage of phosphate ester

Satnami

Dewangan

Kandpal

et al. 2016

Journal of Molecular Liquids

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“…The kinetic behavior of enzymatic reaction can be affected by aqueous surfactant medium having specific condition below and above the CMC. The CMC of monomeric and cationic gemini surfactant in aqueous solution is reported in Table . In comparison to the Michaelis constant, K M reported in Table with respect to aqueous buffer, the PNPA hydrolysis is 2.85 and 1.42 times higher for CTAB and CTPB, respectively, whereas the catalytic constant, k cat , remains similar for all three cases, indicating the competitive catalysis type of enzymatic reaction.…”

Section: Resultsmentioning

confidence: 90%

“…Cationic gemini surfactants hold two heads and two tail groups connected by a spacer. As the spacer chain length increases ( s = 3–12), it twists toward the alkyl chains, further showing a strong hydrophobic interface between the alkyl tails of the surfactants leading to boost the micelle formation, therefore lowering the CMC values . Although difference between the spacer chain length modifies the molecular shape and physicochemical parameter such as CMC of gemini micellar aggregates, these changes affect the catalytic rate constants for the PNPA hydrolysis.…”

Section: Resultsmentioning

confidence: 99%

Influence of Amine-Based Cationic Gemini Surfactants on Catalytic Activity of α-Chymotrypsin

Verma

Ghritlahre

Ghosh

et al. 2016

Int. J. Chem. Kinet.

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The α‐chymotrypsin activity was tested in aqueous media with the presence of novel cationic amine–based gemini surfactant, with different spacer chain lengths and head group size, and also compared with the cationic cetyltrimethylammonium bromide (CTAB) and cetyltriphenylphosphonium bromide (CTPB) surfactants and aqueous buffer only. The p‐nitrophenyl acetate (PNPA) hydrolysis rate was monitored in the presence of the surfactant concentration at 30°C. Most of these gemini surfactants gave higher catalytic activity as compared to cationic CTAB and CTPB. The highest superactivity was measured in the presence of gemini 16‐12‐16, [dodecanediyl‐1,12‐bis(cetyldimethylammonium bromide)] surfactant at pH 7.5. The catalytic reaction follows the Michaelis–Menten mechanism. The catalytic rate constants, kcat, show the same profile that the catalytic affinity; KM being enhanced with increasing space chain length. The results are favorable for considering that the amine‐based gemini surfactant influences more than both the aqueous and cationic micellar media.

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“…Ghosh et al [22] studied the temperature and solvophobic effect on the micellization of some cationic gemini surfactants. Addition of polar organic solvents with properties close to those of water, such as ethylene glycol, glycerol and formamide, have been investigated by our research group [27][28][29]. Ethylene glycol (EG) and diethylene glycol (DEG) have been selected as organic solvents because of their resemblance to the properties of water and having the ability to promote micelle formation [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polar Organic Solvents on Self‐Aggregation of Some Cationic Monomeric and Dimeric Surfactants

Sinha

Kumar

Lakra

et al. 2015

J Surfact & Detergents

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Surface and micellization behavior of some cationic monomeric surfactants, viz., cetyldiethylethanolammonium bromide (CDEEAB), cetyldimethylethanolammonium bromide (CDMEAB), tetradecyldiethylethanolammonium bromide (TDEEAB) and dimeric surfactants, i.e., alkanediyl-a, x-bis(dimethylhexadecylammonium bromide) (C 16 -s-C 16 , 2Br -where s = 4, 12), butanediyl-1,4-bis(dimethyldodecylammonium bromide (C 12 -4-C 12 , 2Br -) and 2-butanol-1,4-bis(dimethyldodecylammonium bromide) (C 12 -4(OH)-C 12 , 2Br -), was studied in water-organic solvents [10 and 20 % v/v ethylene glycol (EG) and diethylene glycol (DEG)] by conductivity, surface tension and steady-state fluorescence methods at 300 K. The main focus of the present work is on the study of the effect of organic solvents on the critical micelle concentration (CMC), Gibbs free energy of micellization (DG°m), Gibbs free energy of transfer (DG°t rans ), Gibbs adsorption energy (DG°a ds ) and some interfacial parameters such as the surface excess concentration (C max ), minimum area per surfactant molecule (A min ) and surface pressure (p CMC ). The aggregation number (N agg ) and SternVolmer quenching constant (K SV ) were also determined by the steady-state fluorescence method. It was observed that N agg decreased with increasing volume percent of organic solvent. The results exhibited an increase in CMC in waterorganic solvents as compared to the respective surfactants in pure water. The negative values of DG°m and DG°a ds indicate a spontaneous micellization process. The thermodynamics of micellization revealed that the micellizationreducing efficiency of glycols increases with the concentration and the number of ethereal oxygens in the glycol.

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Effect of short chain length alcohols on micellization behavior of cationic gemini and monomeric surfactants

Cited by 59 publications

References 61 publications

Influence of octanohydroxamic acid on the association behavior of cationic surfactants: Hydrolytic cleavage of phosphate ester

Influence of octanohydroxamic acid on the association behavior of cationic surfactants: Hydrolytic cleavage of phosphate ester

Influence of Amine-Based Cationic Gemini Surfactants on Catalytic Activity of α-Chymotrypsin

Effect of Polar Organic Solvents on Self‐Aggregation of Some Cationic Monomeric and Dimeric Surfactants

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