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Fernandes RS, Kumari J, Sriram D, Dey N. Fluorescent Nanoassembly of Tetrazole-Based Dyes with Amphoteric Surfactants: Investigation of Cyanide Sensing and Antitubercular Activity. ACS APPLIED BIO MATERIALS 2023; 6:4158-4167. [PMID: 37737110 DOI: 10.1021/acsabm.3c00357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Tetrazole-based easily synthesizable fluorogenic probes have been developed that can form self-assembled nanostructures in the aqueous medium. Though the compounds could achieve detection of cyanide ions in apolar solvents, such as, THF, significant interference was observed from other basic anions, such as F-, AcO-, H2PO4-, etc. On the other hand, a highly specific response was observed for CN- ions in the aqueous medium. However, the sensitivity was so poor that it could hardly be useful for real-life sample analysis. Interestingly, the co-assembly of such probe molecules with hydroxyethyl-anchored amphoteric surfactants could drastically improve the sensitivity toward CN- ions in water without dampening their excellent selectivity. Also, it was observed that the degree of fluorescence response for CN- ions depends on the nature of the polyaromatic scaffolds (naphthyl vs anthracenyl), the nature of the surfactant assembly (micelle vs vesicle), etc. The mechanistic investigation indicates the hydrogen bonding interaction between the tetrazole -NH group and cyanide ions in the aqueous medium, which can effectively change the electronics of the tetrazole unit, resulting in alteration in the extent of charge transfer interaction. Then, the biocompatible composite materials (dye-surfactant assemblies at different ratios) were tested for antituberculosis activity. Fortunately, in a few cases, the compositions were found to be as effective as the commercially available antituberculosis drug, ethambutol.
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Affiliation(s)
- Rikitha S Fernandes
- Department of Chemistry, BITS-Pilani Hyderabad Campus, Hyderabad 500078, India
| | - Jyothi Kumari
- Department of Pharmacy, BITS-Pilani Hyderabad Campus, Hyderabad 500078, India
| | - Dharmarajan Sriram
- Department of Pharmacy, BITS-Pilani Hyderabad Campus, Hyderabad 500078, India
| | - Nilanjan Dey
- Department of Chemistry, BITS-Pilani Hyderabad Campus, Hyderabad 500078, India
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2
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Krafft phenomenon-based study of the polymer-surfactant interaction. Colloid Polym Sci 2023. [DOI: 10.1007/s00396-023-05056-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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3
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Ali M, Bardhan S, Saha SK. Polyoxyethylene Sorbitan Monolaurate induced vesicle-to-micelle transition of aqueous dimethyldioctadecylammonium bromide dispersion. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118455] [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]
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4
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Li DN, Zhang YX, Ren ZH, Cai LL, Huang J, Li BB, Zhang QH, Yi MT, Quan XF, Wang YX, Wang BR, Qian ZB, Wang JR, Tian H, Yuan J, Wang N, Long QL, Zhang XM. Molecular interaction for quasi-binary mixture of N-acyl amino sulfonate amphoteric surfactant from castor oil and stearyltrimethyl ammonium bromide. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Ramirez RER, Orth ES, Pires C, Zawadzki SF, de Freitas RA. DODAB-DOPE liposome surface coating using in-situ acrylic acid polymerization. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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6
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Kushnazarova RA, Mirgorodskaya AB, Lukashenko SS, Voloshina AD, Sapunova AS, Nizameev IR, Kadirov MK, Zakharova LY. Novel cationic surfactants with cleavable carbamate fragment: Tunable morphological behavior, solubilization of hydrophobic drugs and cellular uptake study. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113894] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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7
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Li DM, Huang J, Ren ZH, Lu YJ, He YJ, Liu SW, Huang JJ. Interfacial properties and micellization of octadecyltrimethylammonium bromide in aqueous solution containing short chain alcohol and effect of chain length of alcohol. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1614027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Dong Mei Li
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, China
| | - Jing Huang
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, China
| | - Zhao Hua Ren
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, China
| | - Ya Jun Lu
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, China
| | - Yao Jing He
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, China
| | - Shu Wen Liu
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, China
| | - Jin Jiang Huang
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, China
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8
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Differential interaction behaviors of an alkaloid drug with DMPG liposome membrane as a function of the phase state of the lipid: Nonionic surfactant-induced solubilization of the lipid. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.152] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Di Francesco M, Celia C, Primavera R, D’Avanzo N, Locatelli M, Fresta M, Cilurzo F, Ventura CA, Paolino D, Di Marzio L. Physicochemical characterization of pH-responsive and fusogenic self-assembled non-phospholipid vesicles for a potential multiple targeting therapy. Int J Pharm 2017; 528:18-32. [DOI: 10.1016/j.ijpharm.2017.05.055] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 05/22/2017] [Accepted: 05/23/2017] [Indexed: 12/15/2022]
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10
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Li W, McManus D, Liu H, Casiraghi C, Webb SJ. Aqueous dispersions of nanostructures formed through the self-assembly of iminolipids with exchangeable hydrophobic termini. Phys Chem Chem Phys 2017. [PMID: 28642943 DOI: 10.1039/c7cp02868g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The addition of amines to an aldehyde surfactant, which was designed to be analogous to didodecyldimethylammonium bromide, gave exchangeable "iminolipids" that self-assembled to give stable aqueous dispersions of nano-sized vesicles. For example, sonication of suspensions of the n-hexylamine-derived iminolipid gave vesicles 50 to 200 nm in diameter that could encapsulate a water-soluble dye. The iminolipids could undergo dynamic exchange with added amines, and the resulting equilibrium constants (Krel) were quantified by 1H NMR spectroscopy. In the absence of lipid self-assembly, in CDCl3, the assayed primary amines gave very similar Krel values. However in D2O the value of Krel generally increased with increasing amine hydrophobicity, consistent with partitioning into a self-assembled bilayer. Amines with aromatic groups showed significantly higher values of Krel in D2O compared to similarly hydrophobic alkylamines, suggesting that π-π interactions favor lipid self-assembly. Given this synergistic relationship, π-rich pyrenyliminolipids were created and used to exfoliate graphite, leading to aqueous dispersions of graphene flakes that were stable over several months.
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Affiliation(s)
- Wen Li
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
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11
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Surface adsorption and spontaneous aggregation of rhamnolipid mixtures in aqueous solutions. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.06.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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12
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The influence of the micellar pseudophase of the double-chained cationic surfactant di-n-tetradecyldimethylammonium bromide on the absorption spectra and protolytic equilibrium of indicator dyes. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.03.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Alkyl chain length asymmetry effects of mixed n-acyl sarcosinate and N-cetylpyridinium chloride surfactants: Spontaneous formation of stable nanovesicles as excipient. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.07.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Kumar A, Kaur G, Chaudhary GR, Mehta S. Aggregation behavior of Dioctadecyldimethylammonium chloride in mixed cationic surfactant system. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.06.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Li W, Yang Y, Luo T, Zhang J, Han B. CO2-induced micelle to vesicle transition in zwitterionic–anionic surfactant systems. Phys Chem Chem Phys 2014; 16:3640-7. [DOI: 10.1039/c3cp54537g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Kaur R, Kumar S, Aswal VK, Mahajan RK. Influence of headgroup on the aggregation and interactional behavior of twin-tailed cationic surfactants with pluronics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:11821-33. [PMID: 23978237 DOI: 10.1021/la401864p] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The surface tension measurements have been employed to characterize the micellar and interfacial behavior of pure and mixed systems of twin-tailed cationic surfactants: dimethylene bis(decyldimethylammonium bromide) (10-2-10), didecydimethylammonium bromide (DDAB), and 1,3-didecyl-2-methylimidazolium chloride (DDIC) with pluronics P84 and F108 in the aqueous solution. The interactions of each surfactant with both pluronics are found to be nonideal and synergistic except for the mixed system of 10-2-10 + F108, for which interactions are antagonistic and every interaction has been studied on the basis of headgroup disparity. Dynamic light scattering (DLS), zeta (ζ) potential, and small angle neutron scattering (SANS) measurements have been used to determine the influence of the mixing ratio on the morphology of the various mixed aggregates that are formed. Pure DDAB is found to form unilamellar vesicles whereas pure 10-2-10 and DDIC form prolate ellipsoidal micelles. The unilamellar vesicles of DDAB are destructed to yield spherical mixed micelles on addition of pluronics via expansion or contraction of vesicles. However, the pure pluronics and their mixed systems with 10-2-10 and DDIC form charged spherical micelles, and charge is confirmed by thenfractional charge and ζ values. The ζ values of pure surfactants are found to decrease on addition of pluronics, indicating a decrease in surface charge on inclusion of pluronics.
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Affiliation(s)
- Rajwinder Kaur
- Department of Chemistry, Guru Nanak Dev University , Amritsar 143005, India
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17
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Paul BK, Guchhait N. Response of an environment-sensitive intramolecular charge transfer probe towards solubilization of liposome membranes by a non-ionic detergent: association and dissociation kinetics. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:117-126. [PMID: 22659278 DOI: 10.1016/j.saa.2012.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 04/10/2012] [Accepted: 05/03/2012] [Indexed: 06/01/2023]
Abstract
The present report describes an endeavor to follow the solubilization of DMPC and DMPG liposome membranes by a non-ionic detergent Triton X-100 on the lexicon of environment-sensitive intramolecular charge transfer (ICT) photophysics of an extrinsic molecular probe 5-(4-dimethylamino-phenyl)-penta-2, 4-dienoic acid methyl ester (DPDAME). The prospective applicability of the probe to function as a reporter for detergent-sequestered solubilization of liposome membranes is argued on the basis of comparison of the spectral properties of the probe in various environments. Fluorescence anisotropy study delineates the degree of motional restriction imposed on the probe in different microheterogeneous assemblies. The kinetics of association of the probe with the liposome membranes and the dissociation kinetics of TX-100-sequestered solubilization process of the liposomes have been monitored by the stopped-flow fluorescence technique and the results are rationalized in relevance to fluorescence anisotropy study.
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Affiliation(s)
- Bijan Kumar Paul
- Department of Chemistry, University of Calcutta, 92 A.P.C. Road, Calcutta 700009, India
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18
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Sanstead PJ, Florio N, Giusto K, Morris C, Lee S. Sensitivity of cationic surfactant templates to specific anions in liquid interface crystallization. J Colloid Interface Sci 2012; 376:152-9. [DOI: 10.1016/j.jcis.2012.02.067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 02/28/2012] [Accepted: 02/29/2012] [Indexed: 10/28/2022]
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19
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Alves FR, Loh W. Vesicles prepared with the complex salts dioctadecyldimethylammonium polyacrylates. J Colloid Interface Sci 2012; 368:292-300. [DOI: 10.1016/j.jcis.2011.11.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 11/09/2011] [Accepted: 11/09/2011] [Indexed: 11/25/2022]
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20
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Almeida JAS, Pinto SPR, Wang Y, Marques EF, Pais AACC. Structure and order of DODAB bilayers modulated by dicationic gemini surfactants. Phys Chem Chem Phys 2011; 13:13772-82. [PMID: 21720610 DOI: 10.1039/c1cp20477g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cationic liposomes have been extensively studied from the experimental and theoretical standpoints, motivated both by their fundamental interest and by potential applications in drug delivery and gene therapy. However, a detailed understanding of the nature of interactions within mixed bilayers containing cationic gemini surfactants is still lacking. This work focuses on the structural and dynamic properties of DODAB membranes in the presence of dicationic gemini surfactants. A thermodynamic characterization of the phase transitions in the mixed systems has been carried out by differential scanning calorimetry, while insight into the molecular interactions in the bilayer has been provided by molecular dynamics. For this purpose, variations in the gemini spacer and tail length, as well as in the respective molar fraction, have been included in both experimental and simulation studies. The results indicate that the influence of cationic gemini surfactants upon the thermotropic behavior and degree of order of DODAB structures is controlled by a complex interplay between charge density, conformation and hydrophobic effects, for which a detailed rationale is provided.
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Affiliation(s)
- João A S Almeida
- Chemistry Department, University of Coimbra, Rua Larga 3004-535 Coimbra, Portugal.
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21
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de Sousa ISC, Castanheira EMS, Rocha Gomes JIN, Real Oliveira MECD. Study of the release of a microencapsulated acid dye in polyamide dyeing using mixed cationic liposomes. J Liposome Res 2011; 21:151-7. [PMID: 20550462 DOI: 10.3109/08982104.2010.492478] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The main objective of this work was to increase the retarding effect of the acid dye Telon(®) Blue RR (C.I. Acid Blue 62; DyStar, Frankfurt, Germany) release on polyamide fibres dyeing by encapsulation of the dye in liposomes as an alternative to synthetic auxiliaries, in order to reduce effluent pollution. The retarding effect achieved with the use of mixed cationic liposomes of dioctadecyldimethylammonium bromide (DODAB)/soybean lecithin (containing a 10% molar fraction of DODAB) was better in comparison with either pure soybean lecithin liposomes or synthetic auxiliaries. The retarding effect of liposomes on the dye release was analysed through changes in the absorption and fluorescence spectra of the acid dye at different conditions. The effect of temperature (in the range of 25 °C - 70 °C) on the spectroscopic behaviour of the dye in the absence and in presence of polyamide was also studied, in order to simulate the dyeing conditions. Exhaustion curves obtained in dyeing experiments showed that, below 45 °C, the retarding effect of the mixed liposomes (lecithin/DODAB (9:1)) was similar to that of the auxiliaries, but better than the one of pure lecithin liposomes. At higher temperatures (above 45 °C), the system lecithin/DODAB presents a better performance, achieving a higher final exhaustion level when compared with the commercial leveling agent without losing the smoothing effect of lecithin.
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Affiliation(s)
- Isabel S C de Sousa
- Departamento de Engenharia Têxtil, Universidade do Minho, Campus de Azurém, Guimarães, Portugal
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22
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Merchán M, Velázquez M. Properties of CHAPS micelles modulated by different polyelectrolytes. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.05.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Tarafdar PK, Swamy MJ. Structure and phase behavior of O-stearoylethanolamine: A combined calorimetric, spectroscopic and X-ray diffraction study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:872-81. [DOI: 10.1016/j.bbamem.2010.01.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Revised: 01/10/2010] [Accepted: 01/19/2010] [Indexed: 11/26/2022]
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24
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Li W, Zhang J, Zhao Y, Hou M, Han B, Yu C, Ye J. Reversible Switching of a Micelle-to-Vesicle Transition by Compressed CO2. Chemistry 2010; 16:1296-305. [DOI: 10.1002/chem.200902465] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Effect of Sonication on the Thermotropic Behavior of DODAB Vesicles Studied by Fluorescence Probe Solubilization. J SURFACTANTS DETERG 2009. [DOI: 10.1007/s11743-009-1169-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Dantas TNC, Wanderley Neto AO, Moura EF, Scatena H, Fonseca JLC. Counterion Nature and Alkylammonium Halide Adsorption Thermodynamics. J DISPER SCI TECHNOL 2009. [DOI: 10.1080/01932690802598747] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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27
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Rodríguez-Pulido A, Aicart E, Junquera E. Electrochemical and spectroscopic study of octadecyltrimethylammonium bromide/DNA surfoplexes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:4402-4411. [PMID: 19366220 DOI: 10.1021/la8034038] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The use of cationic micelles consisting of octadecyltrimethylammonium bromide (C18TAB) to compact calf thymus DNA has been investigated in aqueous buffered solution at 310.15 K by means of conductometry, electrophoretic mobility, and several fluorescence spectroscopy methods. The results indicate that C18TAB micelles, consisting of 44 monomers on average, may compact DNA molecule by an electrostatic interaction that takes place at the cationic spherical micelle surface. The surfoplexes thus formed show a surface density charge that goes from negative to positive values at a Lmic/D mass ratio of around 1.0 (where Lmic and D are the masses of micellized cationic surfactant and DNA), called the isoneutrality ratio (Lmic/D)phi. Values of this characteristic parameter, determined in this work not only from the electrochemical experimental data but also from spectroscopic measurements, are in very good agreement with those ones calculated from molecular parameters and some other properties also obtained in this work. The electrostatic character of the DNA-micelle interaction has been confirmed by analyzing the decrease in fluorescence emission of the fluorophore ethidium bromide, EtBr, initially intercalated between DNA base pairs, as long as the surfoplexes are formed. Fluorescence anisotropy experiments have revealed that micelle packing becomes more rigid in the presence of DNA, but once the surfoplex is formed, the fluidity increases with the Lmic/D mass ratio, attaining its maximum when the isoneutrality ratio is exceeded. This fact, together with the net positive charge of the surfoplexes with the Lmic/D mass ratio over the isoneutrality ratio, makes this regimen of lipid and DNA content the optimum for efficiency in the transfection process.
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Affiliation(s)
- Alberto Rodríguez-Pulido
- Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040-Madrid, Spain
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Feitosa E, Alves FR, Castanheira EMS, Oliveira MECDR. DODAB and DODAC bilayer-like aggregates in the micromolar surfactant concentration domain. Colloid Polym Sci 2009. [DOI: 10.1007/s00396-009-2008-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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29
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The role of counterion on the thermotropic phase behavior of DODAB and DODAC vesicles. Chem Phys Lipids 2008; 156:13-6. [DOI: 10.1016/j.chemphyslip.2008.08.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2008] [Revised: 06/25/2008] [Accepted: 08/05/2008] [Indexed: 11/22/2022]
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30
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Lin C, Zhao J, Jiang R. Nile red probing for the micelle-to-vesicle transition of AOT in aqueous solution. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.09.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Tucker I, Penfold J, Thomas RK, Grillo I, Barker JG, Mildner DFR. Self-assembly in mixed dialkyl chain cationic-nonionic surfactant mixtures: dihexadecyldimethyl ammonium bromide-monododecyl hexaethylene glycol (monododecyl dodecaethylene glycol) mixtures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:7674-7687. [PMID: 18582000 DOI: 10.1021/la703702p] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The self-assembly of dialkyl chain cationic surfactant dihexadecyldimethyl ammonium bromide, DHDAB, and nonionic surfactants monododecyl hexaethylene glycol, C(12)E(6), and monododecyl dodecaethylene glycol, C(12)E(12), mixtures has been studied using predominantly small-angle neutron scattering, SANS. The scattering data have been used to produce a detailed phase diagram for the two surfactant mixtures and to quantify the microstructure in the different regions of the phase diagram. For cationic-surfactant-rich compositions, the microstructure is in the form of bilamellar, blv, or multilamellar, mlv, vesicles at low surfactant concentrations and is in an L(beta) lamellar phase at higher surfactant concentrations. For nonionic-rich compositions, the microstructure is predominantly in the form of relatively small globular mixed surfactant micelles, L(1). At intermediate compositions, there is an extensive mixed (blv/mlv) L(beta)/L(1) region. Although broadly similar, in detail there are significant differences in the phase behavior of DHDAB/C(12)E(6) and DHDAB/C(12)E(12) as a result of the increasing curvature associated with C(12)E(12) aggregates compared to that of C 12E 6 aggregates. For the DHDAB/C(12)E(12) mixture, the mixed (blv/mlv) L(beta)/L(1) phase region is more extensive. Furthermore, C(12)E(12) has a greater impact upon the rigidity of the bilayer in the blv, mlv, and L(beta) regions than is the case for C(12)E(6). The general features of the phase behavior are also reminiscent of that observed in phospholipid/surfactant mixtures and other related systems.
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Affiliation(s)
- I Tucker
- Unilever Research and Development Laboratory, Port Sunlight, Quarry Road East, Bebington, Wirral CH63 3JW, UK
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