1
|
Masrat R, Majid K. Solubilization of pyrene by mixed polymer-cationic/nonionic surfactant systems: Effect of polymer concentration. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
2
|
Pan A, Phani Kumar BV, Mati SS, Mal A, Prameela GK, Aswal VK, Moulik SP. Condition dependent self-aggregation behavior of aerosol-OT in mixed water-alcohol media: Physicochemical investigation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
3
|
Lalthlengliani J, Gurung J, Pulikkal AK. Solubilization of aqueous-insoluble phenothiazine drug in TX-100 micellar solution and interactions of cationic/anionic surfactants with phenothiazine–TX-100 system. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118823] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
4
|
Niraula TP, Shah R, Kumar D, Dominguez H, Ríos-López M, Salazar-Arriaga AB, De R, Bhattarai A. Influence of solvent permittivity and divalent salt on micellization behavior of sodium dodecyl sulfate: Conductivity measurements and simulation study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118186] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
5
|
Conductivity and cloud point studies of the interaction of lomefloxacin hydrochloride with anionic and nonionic surfactants in electrolytes solution. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116953] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
6
|
Gurung J, Anjudikkal J, Pulikkal AK. Amphiphilic drug–additive systems in aqueous and organic solvent–water mixed media: A comprehensive account on physicochemical properties. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
7
|
Kaur H, Aggarwal N, Sood AK, Banipal TS. Analysis of micellar, thermodynamic and structural parameters of gemini surfactants in aqueous solutions of vitamins. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
8
|
Ghimire Y, Amatya S, Shah SK, Bhattarai A. Thermodynamic properties and contact angles of CTAB and SDS in acetone–water mixtures at different temperatures. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-3036-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
9
|
Bis-quaternary ammonium gemini surfactants for gene therapy: Effects of the spacer hydrophobicity on the DNA complexation and biological activity. Colloids Surf B Biointerfaces 2020; 189:110817. [DOI: 10.1016/j.colsurfb.2020.110817] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 12/25/2019] [Accepted: 01/20/2020] [Indexed: 01/05/2023]
|
10
|
Wagay TA, Shergujri MA, Askari H. Mixed micellization behavior of benzyldimethylhexadecylammonium chloride with gemini surfactants and their applications in the synthesis of silver nanoparticles. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1710186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tariq Ahmad Wagay
- Department of Chemistry, North-Eastern Hill University, Shillong, India
| | | | - Hassan Askari
- Department of Chemistry, North-Eastern Hill University, Shillong, India
| |
Collapse
|
11
|
Banjare RK, Banjare MK, Panda S. Effect of Acetonitrile on the Colloidal Behavior of Conventional Cationic Surfactants: A Combined Conductivity, Surface Tension, Fluorescence and FTIR Study. J SOLUTION CHEM 2019. [DOI: 10.1007/s10953-019-00937-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
12
|
Szymczyk K, Taraba A, Szaniawska M. Interactions of Tween 20, 60 and 80 with dye molecules: Spectroscopic analysis. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
13
|
Tan J, He Z, Zhou D. Aggregation behavior of tri(trimethylsiloxy)silyl-propylpyridinnium chloride in non-aqueous solution. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
14
|
An interplay between spacer nature and alkyl chain length on aqueous micellar properties of cationic Gemini surfactants: A multi-technique approach. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
15
|
Adam CG, Fortunato GG. Synthesis and Self‐Assembly Properties of New Surface‐Active 1‐Alkylimidazolium Ionic Liquids in Aqueous Media. J SURFACTANTS DETERG 2019. [DOI: 10.1002/jsde.12260] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Claudia G. Adam
- IQAL, Instituto de Química del Litoral (UNL‐CONICET)Facultad de Ingeniería Química‐Universidad Nacional del Litoral Santiago del Estero 2829, (3000), Santa Fe Argentina
- Researcher from National Council of Scientific and Technical Research (CONICET) Godoy Cruz, 2290, Buenos Aires Argentina
| | - Graciela G. Fortunato
- IQAL, Instituto de Química del Litoral (UNL‐CONICET)Facultad de Ingeniería Química‐Universidad Nacional del Litoral Santiago del Estero 2829, (3000), Santa Fe Argentina
| |
Collapse
|
16
|
Sidim T, Akbaş H. Thermodynamic and Interfacial Properties of Cationic Gemini Surfactant in the Presence of Alcohols. TENSIDE SURFACT DET 2018. [DOI: 10.3139/113.110565] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The micellar properties of the cationic Gemini surfactant ethanediyl-1,2-bis(dimethyldodecyl ammonium bromide), C12H25 · (CH3)2N+–(CH2)2–N+(CH3)2C12H25 · 2Br− (12-2-12), with short chain alcohols have been studied by conductivity and surface tension measurements within the temperature range 293.15 K–313.15 K and alcohol percentage. The critical micelle concentration (CMC) of 12-2-12 solution, degree of ionization (α) and standard Gibbs free energy of micellization (ΔG°m), standard enthalpy of micellization (ΔH°m) were calculated from conductivity and surface tension data. The experimental data show that the CMC values of cationic Gemini surfactants increased with addition of methanol, ethanol and n-propanol. The thermodynamic parameters (ΔG°m), (ΔH°m) and (ΔS°m) of micellization of 12-2-12 in alcohol were also calculated from the temperature dependence of the CMC values. CMC, (α), (ΔH°m) and (ΔS°m) increased linearly with increasing temperature. In the mixture of dimeric cationic surfactant (12-2-12) and alcohol solutions, the CMC values showed a slight increase with increasing alcohol concentration. CMC, maximum surface excess concentration at the solution/air interface, Γmax, minimum area per surfactant molecule, Amin, and the surface pressure at CMC, ¶CMC, values calculated from the surface tension measurements and thermodynamic parameters have been evaluated at same temperatures.
Collapse
|
17
|
Micellization of sodium dodecyl sulphate in presence and absence of alkali metal halides at different temperatures in water and methanol-water mixtures. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
18
|
Pulikkal AK, Gurung J. Clouding behavior of antidepressant drug–additive system in ethylene glycol/glycerol–water mixed media and their thermodynamic parameters at cloud point. NEW J CHEM 2018. [DOI: 10.1039/c7nj04369d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The influence of ethylene glycol (EG)/glycerol(GL)–water mixed media on clouding action of an amphiphilic drug, amitriptyline hydrochloride was studied in presence and absence of inorganic salts in selected compositions of EG–WR and GL–WR mixed media.
Collapse
Affiliation(s)
- Ajmal Koya Pulikkal
- Department of Chemistry
- National Institute of Technology Mizoram
- Chaltlang
- Aizawl 796012
- India
| | - Jackson Gurung
- Department of Chemistry
- National Institute of Technology Mizoram
- Chaltlang
- Aizawl 796012
- India
| |
Collapse
|
19
|
Gurung J, Koya PA. Effects of Cationic Surfactants on Clouding Action of the Drug Amitriptyline Hydrochloride in Ethylene Glycol-Water and Glycerol-Water Mixed Media. ChemistrySelect 2017. [DOI: 10.1002/slct.201701772] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jackson Gurung
- Department of Chemistry; National Institute of Technology Mizoram; Chaltlang, Aizawl 796012, Mizoram India, E-mail address
| | - Pulikkal Ajmal Koya
- Department of Chemistry; National Institute of Technology Mizoram; Chaltlang, Aizawl 796012, Mizoram India, E-mail address
| |
Collapse
|
20
|
Bhattarai A, Yadav AK, Sah SK, Deo A. Influence of methanol and dimethyl sulfoxide and temperature on the micellization of cetylpyridinium chloride. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.07.085] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
21
|
Zhang T, Cui D, Mao J, Song C. Aggregation properties and thermodynamics of micellization of gemini surfactants with diamide groups and rigid spacers in water and water-organic solvent mixed media. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.04.078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
22
|
Self-aggregation of ionic liquid-cationic surfactant mixed micelles in water and in diethylene glycol–water mixtures: Conductometric, tensiometric, and spectroscopic studies. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.03.109] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
23
|
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
|
24
|
Shah SK, Chatterjee SK, Bhattarai A. Micellization of cationic surfactants in alcohol — water mixed solvent media. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.07.098] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
25
|
Satnami ML, Dewangan HK, Kandpal N, Nagwanshi R, Ghosh KK. Influence of octanohydroxamic acid on the association behavior of cationic surfactants: Hydrolytic cleavage of phosphate ester. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.06.052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
26
|
Wijaya EC, Separovic F, Drummond CJ, Greaves TL. Micelle formation of a non-ionic surfactant in non-aqueous molecular solvents and protic ionic liquids (PILs). Phys Chem Chem Phys 2016; 18:24377-86. [PMID: 27533137 DOI: 10.1039/c6cp03332f] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Many ionic liquids and low molecular weight polar solvents have been reported to support amphiphile self-assembly, with most of these reported for the first time in the last decade. This phenomenon is attributed to the solvophobic effect (analogous to the hydrophobic effect in water). However, to date there has been no systematic study which evaluates micelle formation in a large library of non-aqueous solvents. Here we investigate micelle formation of a non-ionic amphiphile, hexa-ethyleneglycol mono n-dodecyl ether, C12E6, in a diverse range of molecular solvents and protic ionic liquids (PILs). Nine of the 19 non-aqueous molecular solvents investigated, and all four of the PILs, were found to support micelle formation. A link was investigated between the solvent cohesive energy density (as estimated using the Gordon parameter) and both the critical micelle concentration and the related free energy of micellization . In addition, the chemical structure and liquid mesostructure of the solvent were found to be important factors in the ability of the solvents to support micelle formation.
Collapse
Affiliation(s)
- Emmy C Wijaya
- School of Chemistry, Bio21 Institute, University of Melbourne, VIC 3010, Australia
| | | | | | | |
Collapse
|
27
|
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]
|
28
|
Aggregation of diester-bonded cationic gemini surfactants in the presence of ethylene glycol: An electrical conductivity study. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.01.067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
29
|
Mallick S, Pal K, Koner AL. Probing microenvironment of micelle and albumin using diethyl 6-(dimethylamino)naphthalene-2,3-dicarboxylate: An electroneutral solvatochromic fluorescent probe. J Colloid Interface Sci 2016; 467:81-89. [DOI: 10.1016/j.jcis.2015.12.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 12/08/2015] [Accepted: 12/11/2015] [Indexed: 11/15/2022]
|
30
|
Micellization phenomena of amphiphilic drug and TX-100 mixtures: Fluorescence, UV-visible and 1H NMR study. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.10.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Jaiswal S, Mondal R, Paul D, Mukherjee S. Investigating the micellization of the triton-X surfactants: A non-invasive fluorometric and calorimetric approach. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2015.12.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
More U, Kumari P, Vaid Z, Behera K, Malek NI. Interaction Between Ionic Liquids and Gemini Surfactant: A Detailed Investigation into the Role of Ionic Liquids in Modifying Properties of Aqueous Gemini Surfactant. J SURFACTANTS DETERG 2015. [DOI: 10.1007/s11743-015-1747-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
33
|
Sonu, Kumari S, Saha SK. Effect of Polymethylene Spacer of Cationic Gemini Surfactants on Solvation Dynamics and Rotational Relaxation of Coumarin 153 in Aqueous Micelles. J Phys Chem B 2015; 119:9751-63. [PMID: 26107156 DOI: 10.1021/acs.jpcb.5b03081] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present work demonstrates the solvation dynamics and rotational relaxation of Coumarin 153 (C-153) in the micelles of a series of cationic gemini surfactants, 12-s-12, 2Br(-) containing a hydrophobic polymethylene spacer with s = 3, 4, 6, 8, 12. Steady-state and time-correlated single-photon counting (TCSPC) fluorescence spectroscopic techniques have been used to carry out this study. Steady-state and TCSPC fluorescence data suggest that C-153 molecules are located at the Stern layer of micelles. While probe molecules feel more or less the same micropolarity in the micellar phase, the microviscosity of micelles decreases with spacer chain length. Solvation dynamics at the Stern layer is bimodal in nature with fast solvation as a major component. Counter ions and water molecules bonded with the polar headgroups of surfactant molecules are responsible for the slow component. Average solvation time increases with spacer chain length because of the increased degree of counter ion dissociation. Some water molecules are involved in the solvation of counter ions themselves, resulting in the decrease in "free" water molecules to be available for the solvation of C-153. The hydrophobic spacer chain also has an effect on increasing the solvation time with increasing chain length. The average rotational relaxation time for C-153 decreases with spacer chain length with a rapid decrease at s > 4. The anisotropy decay of C-153 in micelles is biexponential in nature. The slow rotational relaxation is due to the lateral diffusion of C-153 in micelles. Lateral diffusion is much faster than the rotational motion of a micelle as a whole. The rotational motion of the micelle as a whole becomes faster with the decreasing size of micelles.
Collapse
|
34
|
Effect of Polar Organic Solvents on Self-Aggregation of Some Cationic Monomeric and Dimeric Surfactants. J SURFACTANTS DETERG 2015. [DOI: 10.1007/s11743-015-1686-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
35
|
Das S, Mukherjee I, Paul BK, Ghosh S. Physicochemical behaviors of cationic gemini surfactant (14-4-14) based microheterogeneous assemblies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:12483-12493. [PMID: 25241843 DOI: 10.1021/la5025923] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A comprehensive study of micellization and microemulsion formation of a cationic gemini surfactant (tetramethylene-1,4-bis(dimethyltetradecylammonium bromide; 14-4-14) in the absence or presence of hydrophobically modified polyelectrolyte, sodium carboxymethylcellulose (NaCMC), has been conducted by conductometry, tensiometry, microcalorimetry, and fluorimetry methods at different temperatures. Both critical micelle concentration and degree of ionization of the surfactant have been observed to increase with increasing temperature. The interfacial and thermodynamic parameters were evaluated. The standard Gibbs free energy of micellization (ΔGm°) is negative, which decreases with increase in temperature. Larger entropic contribution is observed compared to the enthalpy. The interaction of 14-4-14 with NaCMC produces coacervates which was determined from turbidimetry method. The pseudoternary phase behavior of the microemulsion systems comprising water (or NaCMC as additive), 14-4-14, isopropanol (IP) or n-butanol (Bu) as cosurfactant, and isopropyl myristate (IPM) were studied at 298 K. Phase diagrams reveal that IP derived microemulsions (in the absence of NaCMC) offer a large isotropic region compared to Bu-derived systems at comparable physicochemical conditions. Increasing the concentration of IP or Bu decreases the isotropic region in the phase diagram. NaCMC influences the microemulsion zone, depending upon its concentration, and type of cosurfactant and surfantant/cosurfactant ratio. Dynamic light scattering and conductometric measurements show the size of the droplet, threshold temperature of percolation, scaling parameters, and activation energy of the percolation process of 14-4-14/IP or Bu derived microemulsion systems without/with NaCMC at various physicochemical conditions. Bu exerts a greater effect to reduce θt than IP as a cosurfactant (in the absence of NaCMC) at comparable ω. On the other hand, IP showed better percolating effect than Bu in the presence of NaCMC. Bu and IP (as cosurfactant) and NaCMC (as additive) influenced the microemulsion droplet size (Dh) to different extents under comparable conditions. Temperature insensitive microemulsions have been reported at the studied temperature range (298–353 K). 14-4-14/IP (1:2)-derived microemulsion showed a fractured surface at fixed ω = 15, where ω is the water and surfactant molar ratio, and temperature (298 K); whereas, large scale mesospheres comprising multiple closely winded nanoslices and spheroid morphology were formed in 14-4-14/IP and 14-4-14/Bu microemulsions, respectively, in the presence of 0.01 g % NaCMC, at comparable conditions. These systems revealed good antimicrobial activity toward the strains of Gram-positive Bacillus subtilis and Gram-negative Escherichia coli bacteria at 298 K, and inhibitory effect was governed by ω, type of cosurfactant, and bacterial strains.
Collapse
Affiliation(s)
- Sibani Das
- Centre for Surface Science, Department of Chemistry, Jadavpur University , Kolkata 700 032, India
| | | | | | | |
Collapse
|
36
|
Interfacial and Solution Behavior of Amphiphilic Drug and Counterion-Coupled Gemini (COCOGEM) Surfactants. J SURFACTANTS DETERG 2014. [DOI: 10.1007/s11743-014-1643-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
37
|
Le VH, Yanney M, McGuire M, Sygula A, Lewis EA. Thermodynamics of host-guest interactions between fullerenes and a buckycatcher. J Phys Chem B 2014; 118:11956-64. [PMID: 25248285 PMCID: PMC4199543 DOI: 10.1021/jp5087152] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
1H NMR and isothermal
titration calorimetry (ITC) experiments
were employed to obtain reliable thermodynamic data for the formation
of the 1:1 inclusion complexes of fullerenes C60 and C70 with the buckycatcher (C60H28). NMR
measurements were done in toluene-d8 and
chlorobenzene-d5 at 288, 298, and 308
K, while the ITC titrations were performed in toluene, chlorobenzene, o-dichlorobenzene, anisole, and 1,1,2,2-tetrachloroethane
at temperatures from 278 to 323 K. The association constants, Ka, obtained with both techniques are in very
good agreement. The thermodynamic data obtained by ITC indicate that
generally the host–guest association is enthalpy-driven. Interestingly,
the entropy contributions are, with rare exceptions, slightly stabilizing
or close to zero. Neither ΔH nor ΔS is constant over the temperature range studied, and these
thermodynamic functions exhibit classical enthalpy/entropy compensation.
The ΔCp values
calculated from the temperature dependence of the calorimetric ΔH values are negative for the association of both fullerenes
with the buckycatcher in toluene. The negative ΔCp values are consistent with some desolvation
of the host-cavity and the guest in the inclusion complexes, C60@C60H28 and C70@C60H28.
Collapse
Affiliation(s)
- Vu H Le
- Department of Chemistry, Mississippi State University , Mississippi State, Mississippi 39762, United States
| | | | | | | | | |
Collapse
|
38
|
Pan A, Naskar B, Prameela GKS, Kumar BVNP, Aswal VK, Bhattacharya SC, Mandal AB, Moulik SP. Micellization and related behavior of sodium dodecylsulfate in mixed binary solvent media of tetrahydrofuran (Tf) and formamide (Fa) with water: a detailed physicochemical investigation. SOFT MATTER 2014; 10:5682-5694. [PMID: 24983665 DOI: 10.1039/c4sm00650j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The detailed aggregation behavior of sodiumdodecyl sulfate (SDS) in tetrahydrofuran (Tf)-water (W) and formamide (Fa)-water (W) media at varied volume percent compositions has been investigated. Surface tension (ST), conductance (Cond), viscosity (Visc), isothermal titration calorimetry (ITC), nuclear magnetic resonance (NMR) and small angle neutron scattering (SANS) were used in this study. The presence of nonaqueous solvents affected the critical micelle concentration (CMC) of SDS, the counter-ion binding of the micelle, the energetics of the air/water interfacial adsorption and micellization of the amphiphiles in the bulk, the ion-association (ion-pair, triple-ion, quadruple, etc. between Na(+) and DS(-) ions) as well as the weakly soluble (aggregation less) amphiphile solution. Tf has been observed to produce a "dead zone" or "non-micelle formation zone" in the mixed Tf-W domain of 10-40 vol%. Fa influenced the SDS aggregation up to 70 vol%, at higher proportions (below the Krafft temperature (K(T))), instead of the micelle, "randomly arranged globular assembly" (RAGA) was formed. The correlation of the standard free energy of micellization (ΔG(m)(0)) with different solvent parameters (1) dielectric constant (ε), (2) viscosity (η0), (3) Reichardt parameter (E(T)(30)), (4) Gordon parameter (G), and (5) Hansen-Hildebrand hydrogen bonding parameter (δ(h)) has been attempted. It has been found that δ(h) produced a master correlation between ΔG(m)(0) and δ(h) for different binary mixtures such as Tf-W, Fa-W, Ml-W and Dn-W.
Collapse
Affiliation(s)
- A Pan
- Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700032, India.
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Singh V, Tyagi R. Unique Micellization and CMC Aspects of Gemini Surfactant: An Overview. J DISPER SCI TECHNOL 2014. [DOI: 10.1080/01932691.2013.856317] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
40
|
|
41
|
Influence of aquo-organic solvent media on the self-aggregation of sodium dodecyl sulfate (SDS) and its interaction with polyvinylpyrrolidone (PVP). Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3273-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
42
|
Das S, Naskar B, Ghosh S. Influence of temperature and organic solvents (isopropanol and 1,4-dioxane) on the micellization of cationic gemini surfactant (14-4-14). SOFT MATTER 2014; 10:2863-2875. [PMID: 24668039 DOI: 10.1039/c3sm52938j] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The micellar properties of gemini surfactant, tetramethylene-1,4-bis(dimethyltetradecylammonium bromide) (14-4-14) in binary aqueous mixtures of isopropanol (IP) and 1,4-dioxane (DO) were investigated by tensiometric, conductometric and microcalorimetric methods in the temperature range of 298 to 323 K. The values of both critical micelle concentration (cmc) and degree of dissociation increase with increasing temperature and concentration of cosolvent. The energetics of micellization was determined from the temperature dependence of critical micelle concentration values. The standard Gibbs free energy of micellization (ΔG) was found to be negative and the negative value decreases with both temperature and concentration of cosolvent. The Gibbs free energy of micellization (ΔG) is mainly controlled by tail transfer free energy. The enthalpy of micellization obtained from direct calorimetry, Gibbs-Helmholtz equation and van't Hoff methods are presented and compared. Entropic contribution is found to be larger than the enthalpy and for all the systems, an enthalpy-entropy compensation phenomenon was obtained. Some interfacial parameters, e.g., Gibbs surface excess (Γmax), minimum area per surfactant molecule (Amin), surface pressure (Πcmc) were been calculated. The fluorimetric technique was used to understand the microenvironment of the solution under the influence of cosolvent. The micellar aggregation number of 14-4-14 in a binary mixed solvent was also determined from fluorimetry using pyrene as a probe. Two fluorophores, fluorescein and curcumin delivered the information of the peripheral region of the micellar interface and palisade region. The self-diffusion coefficients of the micellar media were evaluated using the cyclic voltammetry (CV) method. Such multi-technique investigation provides a new look into the role of solvation in micellization.
Collapse
Affiliation(s)
- Sibani Das
- Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata - 700 032, India.
| | | | | |
Collapse
|
43
|
Tiwari AK, Sonu, Saha SK. Effect of Hydroxyl Group Substituted Spacer Group of Cationic Gemini Surfactants on Solvation Dynamics and Rotational Relaxation of Coumarin-480 in Aqueous Micelles. J Phys Chem B 2014; 118:3582-92. [DOI: 10.1021/jp4069703] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Amit K. Tiwari
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India
| | - Sonu
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India
| | - Subit K. Saha
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India
| |
Collapse
|
44
|
Karumbamkandathil A, Ghosh S, Anand U, Saha P, Mukherjee M, Mukherjee S. Micelles of Benzethonium Chloride undergoes spherical to cylindrical shape transformation: An intrinsic fluorescence and calorimetric approach. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.01.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
45
|
Dey J, Kumar S, Srivastava A, Verma G, Hassan P, Aswal V, Kohlbrecher J, Ismail K. Effect of ethylene glycol on the special counterion binding and microstructures of sodium dioctylsulfosuccinate micelles. J Colloid Interface Sci 2014; 414:103-9. [DOI: 10.1016/j.jcis.2013.10.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 10/02/2013] [Accepted: 10/04/2013] [Indexed: 10/26/2022]
|
46
|
Abdel-Rahem RA. Influence of Glycerol and Temperature on the Phase Behavior and Micellization of CTAB and SDS in Aqueous Solutions. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.731647] [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]
|
47
|
Sonu, Tiwari AK, Saha SK. Study on Mixed Micelles of Cationic Gemini Surfactants Having Hydroxyl Groups in the Spacers with Conventional Cationic Surfactants: Effects of Spacer Group and Hydrocarbon Tail Length. Ind Eng Chem Res 2013. [DOI: 10.1021/ie303616j] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Sonu
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan,
India
| | - Amit K. Tiwari
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan,
India
| | - Subit K. Saha
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan,
India
| |
Collapse
|
48
|
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]
|
49
|
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]
|
50
|
Wijaya EC, Greaves TL, Drummond CJ. Linking molecular/ion structure, solvent mesostructure, the solvophobic effect and the ability of amphiphiles to self-assemble in non-aqueous liquids. Faraday Discuss 2013; 167:191-215. [DOI: 10.1039/c3fd00077j] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|