1
|
MacLennan S, Marangoni DG. Thermodynamics of glyme-sodium dodecyl sulfate (SDS) mixed micelle formation via isoperibol solution calorimetry: Temperature, and concentration effects. J INDIAN CHEM SOC 2023. [DOI: 10.1016/j.jics.2023.100980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
|
2
|
Petropolis NP, Petropolis HM, MacNeil NE, Doucet TM, Marangoni DG. The Interaction of Glymes with Surfactant Micelles. J SURFACTANTS DETERG 2020. [DOI: 10.1002/jsde.12476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | - Nicole E. MacNeil
- Department of Chemistry St. F.X. University Antigonish NS B2G 2W5 Canada
| | - Taylor M. Doucet
- Department of Chemistry St. F.X. University Antigonish NS B2G 2W5 Canada
| | | |
Collapse
|
3
|
Hoque MA, Mahbub S, Khan MA, Eldesoky GE. Interaction of sodium alginate with cetyltrimethylammonium bromide in aqua-organic mixed solvents: influence of temperatures and compositions. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1847661] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Md. Anamul Hoque
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka, Bangladesh
| | - Shamim Mahbub
- Department of Chemistry & Physics, Gono Bishwabidyalay, Savar, Dhaka, Bangladesh
| | | | - Gaber E. Eldesoky
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| |
Collapse
|
4
|
Co-solvent Effect on Spontaneous Formation of Large Nanoscale Structures in Catanionic Mixtures in the Anionic-Rich Region. J SOLUTION CHEM 2019. [DOI: 10.1007/s10953-019-00935-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AbstractThe aggregation behavior was investigated in mixtures of sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB) (anionic-rich catanionic) solutions. The study was conducted in solutions of water–ethylene glycol (EG) by means of surface tension, conductometry, cyclic voltammetry, zeta potential measurements, transmission electron microscopy (TEM) and dynamic light scattering (DLS) techniques. The degree of counterion dissociation (α), critical micelle concentration, aggregation numbers, interfacial properties, interparticle interaction parameters, and morphology of aggregates were determined. Based on regular solution theory, the cosolvent effects between SDS and CTAB as surfactants were also analyzed for both mixed monolayers at mixed micelles (βM) and the air/liquid interface (βσ). It was shown that the formation of large aggregates occurred in the presence of an excess of anionic surfactant. A phase transition from cylindrical micelles to spherical micelles in the anionic-rich regime was observed with an increase in the EG volume fraction. The inter particle interactions were assessed in terms of cosolvent effects on the micellar surface charge density and the cylindrical-to-spherical morphology change. Zeta potential and size of the aggregates were determined using dynamic light scattering and confirmed the models suggested for the processes taking place in each system.
Collapse
|
5
|
Razak NA, Fagge II, Elhefian EA, Khan MN. Kinetics and Mechanism of Flexible Nanoparticles-Catalyzed Piperidinolysis of Anionic Phenyl Salicylate: Flexible Nanoparticles: CTABr/M2X/H2O (M2X = 4-MeOSaNa2, 3-, 4-MeSaNa2). RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2019. [DOI: 10.1134/s1990793119010111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
6
|
Pal N, Saxena N, Mandal A. Equilibrium and dynamic adsorption of gemini surfactants with different spacer lengths at oil/aqueous interfaces. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.08.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
7
|
Yusof NSM, Said MNM, Khan MN. Quantitative correlation between counterion (X) binding affinity to cationic micelles and X – Induced micellar growth for substituted iodobenzoates (X). ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2013.10.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
8
|
Sood AK, Pritambir, Aggarwal M. A Mathematical Approach to a More Accurate Determination of Critical Micelle Concentration and Other Thermodynamic Parameters of 14‐2‐14 Gemini Surfactant in Water–Organic Solvent Mixed Media at Variable Temperatures. J SURFACTANTS DETERG 2016. [DOI: 10.1007/s11743-016-1903-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ashwani Kumar Sood
- Department of Chemistry Guru Nanak Dev University Amritsar Punjab 143 005 India
| | - Pritambir
- Department of Chemistry Guru Nanak Dev University Amritsar Punjab 143 005 India
| | - Meenu Aggarwal
- Department of Mathematics DAV College Amritsar Punjab 143 001 India
| |
Collapse
|
9
|
Pillai SA, Chavda S, Bahadur P. Aqueous solution behavior of cationic surfactant modulated by glycol additives: Investigating aggregation and microstructure of tetradecyltrimethylammonium bromide micelles in the presence of propylene glycol, its ethers and esters. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.09.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
10
|
Thermal and scattering studies of Tetronic® 1304 micelles in the presence of industrially important glycols, their oligomers, cellosolves, carbitols, ethers and esters. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.07.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
Koya PA, Wagay TA, Ismail K. Effect of ethylene glycol and propylene glycol on the aggregation of alkanediyl-α,ω-bis(tetradecyldimethylammonium bromide) (14–s–14; s=4–6) gemini surfactants. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.03.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
12
|
Al-Thabaiti SA, Obaid A, Khan Z, Al-Thubaiti KS, Nabi A, Malik MA. Role of cationic gemini surfactants (m-s-m type) on the oxidation of d-glucose by permanganate. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.01.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
13
|
Correlation of Kinetic and Rheological Data for Flexible Nanoparticle Catalysis in the Reaction of Piperidine with PS−. Catal Letters 2016. [DOI: 10.1007/s10562-016-1715-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
14
|
Martín VI, Rodríguez A, Laschewsky A, Moyá ML. Self-aggregation of cationic dimeric surfactants in water–ionic liquid binary mixtures. J Colloid Interface Sci 2014; 430:326-36. [DOI: 10.1016/j.jcis.2014.05.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 05/31/2014] [Accepted: 05/31/2014] [Indexed: 10/25/2022]
|
15
|
Kumar B, Tikariha D, Satnami ML, Barbero N, Quagliotto P, Ghosh KK. Catalytic hydrolysis of phosphodiesters by nucleophilic ions in gemini micellar media. J PHYS ORG CHEM 2014. [DOI: 10.1002/poc.3308] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Birendra Kumar
- Department of Chemistry; Govt. Rajmata Vijayaraje Sindhiya Girls College Kawardha; Distt-Kabirdham 491995 Chhattisgarh India
| | - Deepti Tikariha
- School of Studies in Chemistry; Pt. Ravishankar Shukla University; Raipur Chhattisgarh India
| | - M. L. Satnami
- School of Studies in Chemistry; Pt. Ravishankar Shukla University; Raipur Chhattisgarh India
| | - Nadia Barbero
- Department of Chemistry and Interdepartmental NIS Centre; Università di Torino; Via Pietro Giuria 7 10125 Turin Italy
| | - Pierluigi Quagliotto
- Department of Chemistry and Interdepartmental NIS Centre; Università di Torino; Via Pietro Giuria 7 10125 Turin Italy
| | - Kallol K. Ghosh
- School of Studies in Chemistry; Pt. Ravishankar Shukla University; Raipur Chhattisgarh India
| |
Collapse
|
16
|
Yusof NSM, Khan MN. Quantitative correlation between counterion-affinity to cationic micelles and counterion-induced micellar growth. Adv Colloid Interface Sci 2013; 193-194:12-23. [PMID: 23582713 DOI: 10.1016/j.cis.2013.03.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 03/14/2013] [Accepted: 03/16/2013] [Indexed: 11/26/2022]
Abstract
The fascinating and serendipitous discovery, in 1976, of the characteristic viscoelastic behavior of wormlike micelles of cetyltrimethylammonium salicylate (CTASa) surfactant solution at ~2×10(-4) M CTASa became a catalyst for an increasing interest in both industrial application and mechanism of the origin of micellar growth of this and related wormlike micellar systems. It has been perceived for more than three decades, based upon qualitative evidence, that the extent of the strength of the counterion (X) binding to ionic micelles determines the counterion-induced micellar structural transition from spherical-to-small rodlike-to-linear long stiff/flexible rodlike/wormlike-to-entangled wormlike micelles. This perception predicts the presence of a possible quantitative correlation of counterionic micellar binding constants (KX) with counterion-induced micellar growth. The quantitative estimation of counterion binding affinity to cationic micelles, in terms of the values of the degree of counterion binding (βX), is concluded to be either inefficient or unreliable for moderately hydrophobic counterions (such as substituted benzoate ions). The values of KX, measured in terms of conventional ion exchange constants (KX(Y)), can provide a quantitative correlation between KX or KX(Y) (with a reference counterion Y=Cl(-) or Br(-)) and counterion-induced ionic micellar growth. A recent new semi-empirical kinetic (SEK) method provides the estimation of KX(Y) for Y=Br as well as ratio of counterionic micellar binding constants KX/KBr (= RX(Br)) where the values of KBr and KX have been derived from the kinetic parameters in the presence of cationic spherical and nonspherical micelles, respectively. The SEK method has been used to determine the values of KX(Br) or RX(Br) for X=2-, 3- and 4-ClC6H4CO2(-). Rheometric measurements on aqueous CTABr/MX (MX=2-,3- and 4-ClBzNa) solutions containing 0.015 M CTABr and varying values of [MX] reveal the presence of spherical micelles for MX=2-ClBzNa and long linear as well as entangled wormlike micelles for MX=3- and 4-ClBzNa. The respective values of KX(Br) or RX(Br) of 5.7, 50 and 48 for X=2-, 3- and 4-ClBz(-) give a quantitative correlation with the rheometric measurements of the structural features of micelles of 0.015 M CTABr solutions containing 2-, 3- and 4 ClBzNa.
Collapse
|
17
|
Influence of Spacer on Association Behavior and Thermodynamic Parameters of Dimeric Cationic Surfactants. J SURFACTANTS DETERG 2013. [DOI: 10.1007/s11743-013-1467-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
18
|
Singh N, Ghosh KK. Micellar Characteristics and Surface Properties of Some Sulfobetaine Surfactants. TENSIDE SURFACT DET 2013. [DOI: 10.3139/113.110118] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Abstract
The micellar and interfacial properties of three sulfobetaine surfactants of the type CnH2n+1N+Me2(CH2)3SO3
− (n = 10; SB3-10 n = 12; SB3-12, n = 16; SB3-16) have been studied by conductometry and surface tension measurements. The critical micellar concentration (CMC), surface excess concentration (Γmax), minimum surface area per molecule of surfactant (Amin), Gibbs free energy of micellization (ΔGo
m), Gibbs energy of transfer (ΔGo
trans), the surface pressure at CMC (πCMC) and the Gibbs energy of adsorption (ΔGo
ads) of these surfactants have also been determined. Effect of formamide has been studied at higher temperature conductometrically. Results show that alkyl chain length and the amount of solvent composition influences micellization and surface properties of sulfobetaines. Increment in the CMC, ΔGo
m and ΔGo
trans, can be accounted for changes in the polarity of the bulk phase. Γmax, and πcmc decreases where as Amin increases with increase in the organic solvent. It was also observed that micellization in water-formamide mixture was even slower than in the case of ethylene glycol.
Collapse
|
19
|
Ruiz CC, Molina-Bolívar JA, Hierrezuelo JM, Liger E. Self-assembly, surface activity and structure of n-octyl-β-D-thioglucopyranoside in ethylene glycol-water mixtures. Int J Mol Sci 2013; 14:3228-53. [PMID: 23385232 PMCID: PMC3588041 DOI: 10.3390/ijms14023228] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 01/25/2013] [Accepted: 01/28/2013] [Indexed: 11/21/2022] Open
Abstract
The effect of the addition of ethylene glycol (EG) on the interfacial adsorption and micellar properties of the alkylglucoside surfactant n-octyl-β-d-thioglucopyranoside (OTG) has been investigated. Critical micelle concentrations (cmc) upon EG addition were obtained by both surface tension measurements and the pyrene 1:3 ratio method. A systematic increase in the cmc induced by the presence of the co-solvent was observed. This behavior was attributed to a reduction in the cohesive energy of the mixed solvent with respect to pure water, which favors an increase in the solubility of the surfactant with EG content. Static light scattering measurements revealed a decrease in the mean aggregation number of the OTG micelles with EG addition. Moreover, dynamic light scattering data showed that the effect of the surfactant concentration on micellar size is also controlled by the content of the co-solvent in the system. Finally, the effect of EG addition on the microstructure of OTG micelles was investigated using the hydrophobic probe Coumarin 153 (C153). Time-resolved fluorescence anisotropy decay curves of the probe solubilized in micelles were analyzed using the two-step model. The results indicate a slight reduction of the average reorientation time of the probe molecule with increasing EG in the mixed solvent system, thereby suggesting a lesser compactness induced by the presence of the co-solvent.
Collapse
Affiliation(s)
- Cristóbal Carnero Ruiz
- Department of Applied Physics II, Engineering School, University of Málaga, Málaga 29071, Spain.
| | | | | | | |
Collapse
|
20
|
Role of the spacer in the non ideal behavior of alkanedyil-α,ω-bis(dodecyldimethylammonium) bromide-MEGA10 binary mixtures. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2012.11.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
21
|
Koya PA, Ismail K, Kabir-ud-Din, Wagay TA. Influence of 1,4-dioxane on the aggregation of bis(tetradecyldimethylammonium)butane dibromide gemini surfactant. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.10.041] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
22
|
Chavda S, Bahadur P. Thermodynamic Study of a Cationic Surfactant in Aqueous Solution Containing Ethylene Glycol and Its Oligomers: Effect of Number of Ethereal Oxygen Atoms in Glycols Molecule. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2011.648496] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
23
|
Wang X, Li Q, Chen X, Li Z. Effects of structure dissymmetry on aggregation behaviors of quaternary ammonium Gemini surfactants in a protic ionic liquid EAN. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:16547-16554. [PMID: 23140416 DOI: 10.1021/la304004u] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The aggregation behaviors of a series of dissymmetric cationic Gemini surfactants, [C(m)H(2m+1)(CH(3))(2)N(CH(2))(2)N(CH(3))(2)C(n)H(2n+1)]Br(2), designated as m-2-n (with a fixed m + n = 24, m = 16, 14, 12) have been investigated in a protic ionic liquid, ethylammonium nitrate (EAN). Surface tension, polarized optical microscopy (POM), small-angle X-ray scattering (SAXS), and rheological measurements are adopted to investigate the micellization and lyotropic liquid crystal (LLC) formation. The obtained results indicate that the structure dissymmetry plays an important role in aggregation process of m-2-n. With increasing degree of dissymmetry, the critical micellization concentration, the maximum reduction of solvent surface tension, and the minimum area occupied per surfactant molecule at the air/EAN interface all become smaller. The thermostability of formed LLCs is therefore improved because of the more compact molecules. These characteristics can be explained by the enhancement of solvophobic effect due to the increased structure dissymmetry of Gemini surfactants.
Collapse
Affiliation(s)
- Xudong Wang
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China
| | | | | | | |
Collapse
|
24
|
Domínguez R, Rodríguez A, Maestre A, Robina I, Moyá ML. Synthesis and physicochemical characterization of alkanedyil-α-ω-bis(dimethyldodecylammonium) bromide, 12-s-12,2Br−, surfactants with s=7, 9, 11 in aqueous medium. J Colloid Interface Sci 2012; 386:228-39. [DOI: 10.1016/j.jcis.2012.06.089] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 06/26/2012] [Accepted: 06/27/2012] [Indexed: 10/28/2022]
|
25
|
Physicochemical characterization of cationic gemini surfactants and their effect on reaction kinetics in ethylene glycol–water medium. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.06.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
26
|
Kinetic studies in micellar solutions of novel bromide mono- and dimeric surfactants with phenyl and cyclohexyl rings in the head group. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
27
|
Hoque J, Kumar P, Aswal VK, Haldar J. Aggregation Properties of Amide Bearing Cleavable Gemini Surfactants by Small Angle Neutron Scattering and Conductivity Studies. J Phys Chem B 2012; 116:9718-26. [DOI: 10.1021/jp305590f] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiaul Hoque
- Bioorganic and Medicinal Chemistry
Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
560064, India
| | - Pratik Kumar
- Bioorganic and Medicinal Chemistry
Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
560064, India
| | - Vinod K. Aswal
- Solid State
Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Jayanta Haldar
- Bioorganic and Medicinal Chemistry
Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
560064, India
| |
Collapse
|
28
|
Chavda S, Singh K, Marangoni DG, Bahadur P. Aqueous Solution Behavior of Cationic Surfactant Modulated by the Presence of Glycols and Their Ethers. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2012. [DOI: 10.1246/bcsj.20110404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Suresh Chavda
- Department of Chemistry, Veer Narmad South Gujarat University
| | | | | | - Pratap Bahadur
- Department of Chemistry, Veer Narmad South Gujarat University
| |
Collapse
|
29
|
Tiwari AK, Sonu, Sowmiya M, Saha SK. Micellization behavior of gemini surfactants with hydroxyl substituted spacers in water and water-organic solvent mixed media: The spacer effect. J Mol Liq 2012. [DOI: 10.1016/j.molliq.2011.12.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
30
|
Study of the reaction 2-(p-nitrophenyl)ethyl bromide + OH⁻ in dimeric micellar solutions. Molecules 2011; 16:9467-79. [PMID: 22081123 PMCID: PMC6264658 DOI: 10.3390/molecules16119467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Revised: 10/31/2011] [Accepted: 11/08/2011] [Indexed: 11/24/2022] Open
Abstract
The dehydrobromination reaction 2-(p-nitrophenyl)ethyl bromide + OH−was investigated in several alkanediyl-α-ω-bis(dodecyldimethylammonium) bromide, 12-s-12,2Br− (with s = 2, 3, 4, 5, 6, 8, 10, 12) micellar solutions, in the presence of NaOH 5 × 10−3 M. The kinetic data were quantitatively rationalized within the whole surfactant concentration range by using an equation based on the pseudophase ion-exchange model and taking the variations in the micellar ionization degree caused by the morphological transitions into account. The agreement between the theoretical and the experimental data was good in all the dimeric micellar media studied, except for the 12-2-12,2Br− micellar solutions. In this case, the strong tendency to micellar growth shown by the 12-2-12,2Br− micelles could be responsible for the lack of accordance. Results showed that the dimeric micelles accelerate the reaction more than two orders of magnitude as compared to water.
Collapse
|
31
|
Cationic Micelles Modulated in the Presence of α,ω-Alkanediols: A SANS, NMR and Conductometric Study. J SURFACTANTS DETERG 2011. [DOI: 10.1007/s11743-011-1307-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
32
|
del Mar Graciani M, Rodríguez A, Martín VI, Moyá ML. Study of the SN2 Substitution Reactions Between Methyl Naphtalene-2-Sulfonate and Methyl 4-Nitrobenzene Sulfonate and Bromide Ions in Dodecyl Dibromide Dimeric Micellar Solutions in the Absence and Presence of Alcohols. J SURFACTANTS DETERG 2011. [DOI: 10.1007/s11743-011-1300-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
33
|
Micellization of a cationic gemini surfactant in aqueous solutions with different alkanols and alkanediols as additives: Effect of nonpolar chain and position of hydroxyl groups. J Mol Liq 2011. [DOI: 10.1016/j.molliq.2011.04.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
34
|
Effect of 1-alkanols/salt on the cationic surfactant micellar aqueous solutions—A dynamic light scattering study. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.02.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
35
|
Yusof NSM, Niyaz Khan M. Kinetic and rheological measurements of the effects of inert 2-, 3- and 4-bromobenzoate ions on the cationic micellar-mediated rate of piperidinolysis of ionized phenyl salicylate. J Colloid Interface Sci 2011; 357:121-8. [DOI: 10.1016/j.jcis.2011.01.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Revised: 01/18/2011] [Accepted: 01/20/2011] [Indexed: 10/18/2022]
|
36
|
Effects of nonionic micelles on the rate of alkaline hydrolysis of N-(2'-methoxyphenyl)phthalimide (1): kinetic and rheometric evidence for a transition from spherical to rodlike micelles under the typical reaction conditions. J Colloid Interface Sci 2011; 360:182-8. [PMID: 21549387 DOI: 10.1016/j.jcis.2011.04.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 03/29/2011] [Accepted: 04/07/2011] [Indexed: 12/26/2022]
Abstract
Pseudo-first-order rate constants (k(obs)) for alkaline hydrolysis of N-(2'-methoxyphenyl)phthalimide (1) decrease nonlinearly with increasing total concentration of nonionic surfactant C(m)E(n) (i.e. [C(m)E(n)](T) where m and n represent the respective number of methyl/methylene units in the tail and polyoxyethylene units in the headgroup of a surfactant molecule and m/n=16/20, 12/23 and 18/20) at constant 2% v/v CH(3)CN and 1.0 mM NaOH. The k(obs)vs. [C(m)E(n)](T) data follow the pseudophase micellar (PM) model at ≤ 50 mM C(16)E(20), ≤ 1.4 mM C(12)E(23) and ≤ 2.0 mM C(18)E(20) where rate of hydrolysis of 1 in micellar pseudophase could not be detected. The values of k(obs) fail to follow the PM model at > ∼50 mM C(16)E(20), > ∼1.4 mM C(12)E(23) and > ∼2.0 mM C(18)E(20) which has been attributed to a micellar structural transition from spherical to rodlike which in turn increases C(m)E(n) micellar binding constant (K(S)) of 1 with increasing values of [C(m)E(n)](T). Rheological measurements show the presence of spherical micelles at ≤ 50 mM C(16)E(20), ≤ 1.4 mM C(12)E(23) and ≤ 3.0 mM C(18)E(20). The presence of rodlike micelles is evident from rheological measurements at > ∼50 mM C(16)E(20), > ∼1.4 mM C(12)E(23) and > ∼3.0 mM C(18)E(20).
Collapse
|
37
|
Chavda S, Bahadur P, Aswal VK. Interaction Between Nonionic and Gemini (Cationic) Surfactants: Effect of Spacer Chain Length. J SURFACTANTS DETERG 2011. [DOI: 10.1007/s11743-011-1263-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
38
|
Kabir-ud-Din, Koya PA, Khan ZA. Studies on the Effect of Organic Solvents and Temperature on the Micellar Solution of Pentamethylene-1,5-bis(tetradecyldimethylammonium bromide) Gemini Surfactant. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691003757256] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
39
|
Chavda S, Singh K, Perry M, Marangoni D, Aswal V, Bahadur P. Quantitative analysis and subsequent effects of partitioning of a mono- and dihydric C4 alcohols into the micelles of cationic surfactants. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.02.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
40
|
Khan MN, Sinasamy S. A new semiempirical kinetic method for the determination of ion exchange constants for counterions of cationic micelles: Study of the rate of pH-independent hydrolysis of phthalimide as the kinetic probe. INT J CHEM KINET 2010. [DOI: 10.1002/kin.20522] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
41
|
Khan MN. A new semi-empirical kinetic method for the determination of ion exchange constants for the counterions of cationic micelles. Adv Colloid Interface Sci 2010; 159:160-79. [PMID: 20673861 DOI: 10.1016/j.cis.2010.06.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Revised: 06/17/2010] [Accepted: 06/19/2010] [Indexed: 11/25/2022]
Abstract
A new method, based upon semi-empirical kinetic approach, for the determination of ion exchange constant for ion exchange processes occurring between counterions at the cationic micellar surface is described in this review article. Basically, the method involves a reaction kinetic probe which gives observed pseudo-first-order rate constants (k(obs)) for a nucleophilic substitution reaction between the nonionic and anionic reactants (R and S) in the presence of a constant concentration of both reactants as well as cationic micelles and varying concentrations of an inert inorganic or organic salt (MX). The observed data (k(obs), versus [MX]) fit satisfactorily (in terms of residual errors) to an empirical equation which could be derived from an equation explaining the mechanism of the reaction of the kinetic probe in terms of pseudophase micellar (PM) model coupled with another empirical equation. This (another) empirical equation explains the effect of [MX] on cationic micellar binding constant (K(S)) of the anionic reactant (say S) and gives an empirical constant, K(X/S). The magnitude of K(X/S) is the measure of the ability of X(-) to expel S(-) from a cationic micellar pseudophase to the bulk aqueous phase through ion exchange X(-)/S(-). The values of K(X/S) and K(Y/S) (where Y(-) is another inert counterion) give the ion exchange constant, K(X)(Y) (=K(X)/K(Y) where K(X) and K(Y) represent cationic micellar binding constants of X(-) and Y(-), respectively). The suitability of this method is demonstrated by the use of three different reaction kinetic probes and various MX.
Collapse
|
42
|
Koya PA. Effects of solvent media and temperature on the self-aggregation of cationic dimeric surfactant 14-6-14, 2Br- studied by conductometric and fluorescence techniques. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7905-7914. [PMID: 20438118 DOI: 10.1021/la904812a] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
To explore how the solvent characteristics influence the self-aggregation of the cationic dimeric surfactant hexamethylene-1,6-bis(tetradecyldimethylammonium bromide) (14-6-14, 2Br(-)) and to obtain various energetic parameters, conductometric experiments were performed on the binary mixtures of three organic solvents--viz., 2-methoxyethanol (ME)-, acetonitrile (AN)-, and formamide (FA)- water (WR) at different temperatures ranging from 298.15 to 323.15 K. The steady state fluorescence measurements allowed us to calculate the average aggregation number (N(agg)) and the air-bulk phase surface tension helped us to correlate the solvent cohesive energy density with Gibbs energy of micellization (DeltaG(0)(m)). The results showed that, although micellization process becomes less favorable with the increase in volume % of the ME, AN and FA in the binary mixed media, the increment in the cmc below 20% (v/v) of the organic solvents is comparatively less showing the predominance of WR character in the bulk phase. Because of the decrease in Gibbs interfacial energy contribution (DeltaG(0)(interf)) to DeltaG(0)(m), the average aggregation number (N(agg)) decreased with the increase in the volume % of the organic solvent in the mixed media. As the enthalpy of micellization became more negative, the corresponding entropy change became less positive and enthalpy-entropy compensation phenomenon was observed for the micellization of 14-6-14, 2Br(-) in all the mixed media in the studied temperature range.
Collapse
|
43
|
Khan MN, Azri MHR. Effects of [NaBr] on the Rate of Intramolecular General Base-Assisted Hydrolysis of N-(2′-Hydroxyphenyl)phthalimide in the Presence of Cationic Micelles: Kinetic Evidence for the Probable Micellar Structural Transition. J Phys Chem B 2010; 114:8089-99. [DOI: 10.1021/jp102109q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Niyaz Khan
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | | |
Collapse
|
44
|
Martín VI, Rodríguez A, Graciani MDM, Robina I, Moyá ML. Study of the Micellization and Micellar Growth in Pure Alkanediyl-α-ω-Bis(dodecyldimethylammonium) Bromide and MEGA10 Surfactant Solutions and Their Mixtures. Influence of the Spacer on the Enthalpy Change Accompanying Sphere-to-Rod Transitions. J Phys Chem B 2010; 114:7817-29. [DOI: 10.1021/jp101502a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Victoria Isabel Martín
- Departamento de Química Física, and Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, C/Profesor García González 1, 41012, Sevilla, Spain
| | - Amalia Rodríguez
- Departamento de Química Física, and Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, C/Profesor García González 1, 41012, Sevilla, Spain
| | - María del Mar Graciani
- Departamento de Química Física, and Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, C/Profesor García González 1, 41012, Sevilla, Spain
| | - Inmaculada Robina
- Departamento de Química Física, and Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, C/Profesor García González 1, 41012, Sevilla, Spain
| | - María Luisa Moyá
- Departamento de Química Física, and Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, C/Profesor García González 1, 41012, Sevilla, Spain
| |
Collapse
|
45
|
A new empirical kinetic method for the determination of ion-exchange constants for the counterions of cationic micelles: The rate of piperidinolysis and hydrolysis of anionic phenyl salicylate as the kinetic probes. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.03.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
46
|
Graciani MDM, Rodríguez A, Martín VI, Moyá ML. Micellization and micellar growth of alkanediyl-α,ω-bis(dimethyldodecylammonium bromide) surfactants in the presence of medium-chain linear alcohols. J Colloid Interface Sci 2010; 342:382-91. [DOI: 10.1016/j.jcis.2009.10.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Revised: 10/11/2009] [Accepted: 10/13/2009] [Indexed: 11/16/2022]
|
47
|
Micellization behavior of [C16-12-C16], 2Br− gemini surfactant in binary aqueous-solvent mixtures. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.07.027] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|