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Wang X, Chen J, Wang D, Dong S, Hao J, Hoffmann H. Monitoring the different micelle species and the slow kinetics of tetraethylammonium perfluorooctane-sulfonate by 19F NMR spectroscopy. Adv Colloid Interface Sci 2017. [PMID: 28625561 DOI: 10.1016/j.cis.2017.05.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Since we lack effective tools that can monitor the structures of surfactant micelles in situ, the different equilibrium species and the slow kinetics of micelles are still not well understood. Herein, by using 19F NMR, we simultaneously monitored that micelles of tetraethylammonium perfluorooctanesulfonate (TPFOS, C8F17SO3N(C2H5)4) in water grow more complex in virtue of hydrophobic counterions and the slow kinetic exchange process exists in the system. Apart from the monomeric signals, three sets of micelle signals which correspond to spherical micelles, wormlike/wormlike micelles with rings in end caps and toroidal micelles were successfully detected on the NMR time scale because of the slow exchange rate for surfactant molecules between the monomer and the micelle states. By comparison, other fluoro- and hydrocarbon surfactants with different tail lengths and counterions (+N(CH3)4, +N(C3H7)4, Li+ and Na+) have been studied, and the coexistence of different micelles could also been observed for the aqueous solution of C9F19COON(CH3)4. However, only one set of averaged NMR signals could be observed for these surfactants. The micellization of TPFOS in water is demonstrated to be a predominantly entropy-driven process. Molecular dynamics (MD) simulation revealed an unusual distribution of counterions, providing further understanding of the mechanism of the micelle formation process.
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Affiliation(s)
- Xiaolin Wang
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China
| | - Jingfei Chen
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China; Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, PR China
| | - Dong Wang
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China; Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, PR China
| | - Shuli Dong
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China; Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, PR China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China; Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, PR China.
| | - Heinz Hoffmann
- Physikalische Chemie I, University of Bayreuth, D-95447 Bayreuth, Germany
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2
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Dai C, Ding Q, Zhao M, Zhao J, Fang J, Li H. Construction and performance evaluation of a highly efficient mixed foaming system. RSC Adv 2015. [DOI: 10.1039/c5ra02166a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A fluorocarbon surfactant was synthesized and mixed with SDS to create a highly efficient foaming system.
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Affiliation(s)
- Caili Dai
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Qinfang Ding
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Mingwei Zhao
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Jianhui Zhao
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Jichao Fang
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Hui Li
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
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3
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You Q, Li Z, Ding Q, Liu Y, Zhao M, Dai C. Investigation of micelle formation by N-(diethyleneglycol) perfluorooctane amide fluorocarbon surfactant as a foaming agent in aqueous solution. RSC Adv 2014. [DOI: 10.1039/c4ra11393d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel nonionic fluorocarbon surfactant is synthesized and indicates excellent foaming performance and super surface activity.
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Affiliation(s)
- Qing You
- School of Energy Resources
- China University of Geosciences
- Beijing, China
- Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism
- Ministry of Education
| | - Zhuojing Li
- School of Energy Resources
- China University of Geosciences
- Beijing, China
- Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism
- Ministry of Education
| | - Qinfang Ding
- School of Petroleum Engineering
- China University of Petroleum (East China)
- China
| | - Yifei Liu
- School of Petroleum Engineering
- China University of Petroleum (East China)
- China
| | - Mingwei Zhao
- School of Petroleum Engineering
- China University of Petroleum (East China)
- China
| | - Caili Dai
- School of Petroleum Engineering
- China University of Petroleum (East China)
- China
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4
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Dai C, Du M, Zhao M, You Q, Guan B, Wang X, Liu P. Study of Micelle Formation by Fluorocarbon Surfactant N-(2-hydroxypropyl)perfluorooctane Amide in Aqueous Solution. J Phys Chem B 2013; 117:9922-8. [DOI: 10.1021/jp404387d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Caili Dai
- School of Petroleum Engineering,
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Huadong), Qingdao, Shandong, 266580, People’s
Republic of China
| | - Mingyong Du
- School of Petroleum Engineering,
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Huadong), Qingdao, Shandong, 266580, People’s
Republic of China
| | - Mingwei Zhao
- School of Petroleum Engineering,
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Huadong), Qingdao, Shandong, 266580, People’s
Republic of China
| | - Qing You
- School of Petroleum Engineering,
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Huadong), Qingdao, Shandong, 266580, People’s
Republic of China
| | - Baoshan Guan
- Branch of Langfang of Research Institute of Exploration and Development of Chinese Petroleum, Langfang, Hebei, 060507, People’s Republic of China
| | - Xin Wang
- Branch of Langfang of Research Institute of Exploration and Development of Chinese Petroleum, Langfang, Hebei, 060507, People’s Republic of China
| | - Ping Liu
- Branch of Langfang of Research Institute of Exploration and Development of Chinese Petroleum, Langfang, Hebei, 060507, People’s Republic of China
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Jamison AC, Zhang S, Zenasni O, Schwartz DK, Lee TR. Fibrillar self-organization of a line-active partially fluorinated thiol within binary self-assembled monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:16834-16844. [PMID: 23140360 DOI: 10.1021/la302882w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Self-assembled monolayers (SAMs) were prepared from a novel two-tailed partially fluorinated thiol (F8C11/C16), possessing one hydrocarbon chain and one chain with an extended fluorinated segment, and from mixtures of F8C11/C16 and hexadecanethiol (C16) on gold, with the expectation that the internal chemical dissimilarity and wedge-like shape of F8C11/C16 would lead to unique self-organizational motifs. The SAMs were systematically characterized using ellipsometry, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), contact angle goniometry, and polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS). Based on this characterization, the one-component F8C11/C16 SAMs exhibited relatively poor molecular organization compared to traditional alkanethiols, forming low coverage monolayers with significant molecular disorder. However, the series of mixed SAMs formed from F8C11 and F8C11/C16 were anomalously well ordered as indicated by film thickness, surface coverage, and the frequencies of characteristic vibrational modes. AFM images of these mixed SAMs exhibited nanoscale fibrillar structures in a birds-nest morphology, suggesting that in the presence of a C16 matrix, the F8C11/C16 component organized into the two-dimensional analogue of discrete bilayers. Control experiments involving mixed SAMs comprised of F8C11/C16 and a single-tailed partially fluorinated thiol (F8C11) or C16 and F8C11 exhibited no appreciable indication of interesting self-organization beyond an evenly dispersed mixing of the thiolates or phase separation, respectively.
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Affiliation(s)
- Andrew C Jamison
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5003, USA
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Wadekar MN, Boekhoven J, Jager WF, Koper GJM, Picken SJ. Micellization behavior of aromatic moiety bearing hybrid fluorocarbon sulfonate surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3397-3402. [PMID: 22263549 DOI: 10.1021/la2047799] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Aggregation behavior and thermodynamic properties of two novel homologous aromatic moiety bearing hybrid fluorocarbon surfactants, sodium 2-(2-(4-ethylphenyl)-1,1,2,2-tetrafluoroethoxy)-1,1,2,2-tetrafluoroethanesulfonate (1) and sodium 2-(1,1,2,2-tetrafluoro-2-(4-vinylphenyl)ethoxy)-1,1,2,2-tetrafluoroethanesulfonate (2) were studied using surface tension measurements and isothermal titration calorimetry (ITC) in dilute aqueous solutions at room temperature. Because of the aromatic group in the hydrophobic tail, both surfactants are soluble at room temperature unlike their starting precursor, 5-iodooctafluoro-3-oxapentanesulfonate as well as several other fluorocarbon sulfonic acid salts. Moreover, the surfactant 2 has the ability that it can be polymerized once microemulsions are formed with it. The ionic conductivity measurements of 1 at five different temperatures from 288 to 313 K were carried out to study the effect of temperature on the micellization and its thermodynamics. The pseudophase separation model was applied to estimate thermodynamic quantities from conductivity data. The Gibbs energy of micellization versus temperature exhibited the characteristic U-shaped behavior with a minimum at 306 K. The micellization process was found to be largely entropy driven. Because of its hybrid structure, the entropy change of micellization for 1 was larger than what is common for hydrocarbon surfactants like SDS but less than for fully fluorinated surfactants like NaPFO. The micellization process was found to be following the entropy-enthalpy compensation phenomena.
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Affiliation(s)
- Mohan N Wadekar
- Nano-Structured Materials, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628BL Delft, The Netherlands
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GONZÁLEZ-PÉREZ ALFREDO, PRIETO GERARDO, RUSO JUANM, SARMIENTO FÉLIX. Thermodynamics of self-assembly of sodium octanoate: comparison with a fully fluorinated counterpart. Mol Phys 2009. [DOI: 10.1080/00268970310001620177] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- ALFREDO GONZÁLEZ-PÉREZ
- a Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics , University of Santiago de Compostela , E-15782 , Santiago de Compostela , Spain
| | - GERARDO PRIETO
- a Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics , University of Santiago de Compostela , E-15782 , Santiago de Compostela , Spain
| | - JUAN M. RUSO
- a Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics , University of Santiago de Compostela , E-15782 , Santiago de Compostela , Spain
| | - FÉLIX SARMIENTO
- a Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics , University of Santiago de Compostela , E-15782 , Santiago de Compostela , Spain
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8
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Krafft MP, Riess JG. Chemistry, physical chemistry, and uses of molecular fluorocarbon--hydrocarbon diblocks, triblocks, and related compounds--unique "apolar" components for self-assembled colloid and interface engineering. Chem Rev 2009; 109:1714-92. [PMID: 19296687 DOI: 10.1021/cr800260k] [Citation(s) in RCA: 334] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Marie Pierre Krafft
- Université de Strasbourg, Institut Charles Sadron (SOFFT-CNRS), 23 rue du Loess, 67034 Cedex, Strasbourg, France.
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9
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Saito H, Shinoda W, Mikami M. Enhanced Hydrophobicity of Fluorinated Lipid Bilayer: A Molecular Dynamics Study. J Phys Chem B 2008; 112:11305-9. [DOI: 10.1021/jp801057k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroaki Saito
- Research Institute for Computational Sciences (RICS), Research Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba 305-8568, Japan, and CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Wataru Shinoda
- Research Institute for Computational Sciences (RICS), Research Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba 305-8568, Japan, and CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Masuhiro Mikami
- Research Institute for Computational Sciences (RICS), Research Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba 305-8568, Japan, and CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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Ertekin A, Kausch CM, Kim Y, Thomas RR. Synthesis, characterization, adsorption, and interfacial rheological properties of four-arm anionic fluorosurfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:2412-2420. [PMID: 18266395 DOI: 10.1021/la7031175] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Four-arm oligo(fluorooxetane) tetraols containing -CF3 and -C2F5 groups were prepared in reasonable yields by cationic, ring-opening polymerization of fluorinated oxetane monomers using a tetrafunctional, alkoxylated polyol as initiator and BF3.THF as catalyst. The tetraols were then converted to ammonium sulfate salts using oleum followed by neutralization with ammonium hydroxide in excellent yields. The four-arm oligo(fluorooxetane) sulfates (1=-CF3, 2=-C2F5) have an architecture characterized by a hydrophobic core of oligo(fluorooxetane) arms with a hydrophilic sulfate shell and initiator. The four-arm anionic oligo(fluorooxetane)s are surface active with critical micelle concentration values approximately 4.2x10(-6) and 2.4x10(-6) mol/L for 1 and 2, respectively. Surface tension isotherms in pH 8 buffered solution were measured and data fitted parametrically to the Davies surface tension isotherm equation. Molecular areas at saturation were estimated to be approximately 89 and approximately 85 A2 with DeltaGads=-12.7 and -13.2 kcal/mol for 1 and 2, respectively. The results are compared to two-arm, bolaamphiphilic analogues of 1 and 2 and a small molecule, long perfluoroalkyl-chain (-C8F17), anionic fluorosurfactant (Kausch, C. M.; Kim, Y.; Russell, V. M.; Medsker, R. E.; Thomas, R. R. Langmuir 2003, 19, 7182). Dynamic surface tension data for 1 and 2 were analyzed using the Ward-Tordai mass transport equation to yield concentration-dependent diffusion coefficients. In the concentration range approximately 10(-6) mol/L, diffusion coefficients were estimated to be approximately 1-3x10(-5) cm2/s. Dilational interfacial rheological parameters for 1 and 2 were measured. Values of |E| and E' were found to be larger than those of the two-arm analogues of the same perfluoroalkyl chain length while E' 'and phi were found to be smaller. The magnitude of these values reflects the difference in adsorption strength and mass transport and/or relaxation between the two different architectures.
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Affiliation(s)
- Ayça Ertekin
- Department of Polymer Engineering, Polymer Engineering Academic Center, The University of Akron, Akron, Ohio 44325-0301, USA
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Dupont A, Eastoe J, Murray M, Martin L, Guittard F, Taffin de Givenchy E, Heenan RK. Hybrid fluorocarbon-hydrocarbon CO2-philic surfactants. 1. synthesis and properties of aqueous solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:9953-9959. [PMID: 15518480 DOI: 10.1021/la048447z] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Six different hybrid fluorocarbon-hydrocarbon (F-H) sulfate and sulfonate surfactants, with variations in the relative F/H carbon chain length, have been synthesized and characterized in aqueous solution. These compounds have been targeted for potential activity in densified CO2. Tensiometric data and chemical analyses were consistent with surfactants of high chemical purity. Fluorination in terms of the F/H ratio exerts a strong control over all the surfactant physicochemical properties, including critical micelle concentrations (cmc's) and adsorption isotherms. One of these partially fluorinated surfactants (the sulfonate phi-F6H4) achieves very low surface tensions in water (gamma(cmc) approximately 19 mN m(-1)) more reminiscent of fully fluorinated double-chain compounds. Detailed 19F NMR studies revealed that omega'-CF3 groups can exhibit separate signals for monomeric and micellized forms, hence facilitating cmc determinations. Small-angle neutron scattering investigations confirmed the presence of ellipsoidal or extended disklike micelles, depending on the F-H chain asymmetry. For example, a symmetric hybrid F8H8 generates disklike micelles, whereas chain asymmetry in F8H4 or phi-F6H4 tends to drive cylindrical aggregation structures. These changes are consistent with variations in the surfactant packing parameter caused by the different chain F/H ratios. Hence, adsorption and aggregation are shown to respond in a predictable way to the molecular structure of these unusual surfactants.
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Affiliation(s)
- Audrey Dupont
- School of Chemistry, University of Bristol, Bristol, BS8 1TS United Kingdom
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Characterization of the 1-heptodecafluorodecyl-pyridinium iodide in solution. Colloids Surf A Physicochem Eng Asp 2004. [DOI: 10.1016/j.colsurfa.2004.02.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Seligson AL, Campion BK, Brown JW, Terry RC, Kucerova R, Bienova M, Hajduch M, Sovak M. Development of fluridil, a topical suppressor of the androgen receptor in androgenetic alopecia. Drug Dev Res 2003. [DOI: 10.1002/ddr.10166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Kondo Y, Miyazawa H, Sakai H, Abe M, Yoshino N. First anionic micelle with unusually long lifetime: self-assembly of fluorocarbon-hydrocarbon hybrid surfactant. J Am Chem Soc 2002; 124:6516-7. [PMID: 12047155 DOI: 10.1021/ja0178564] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The exchange of a fluorocarbon-hydrocarbon hybrid surfactant between monomer and micelle states in deuterium oxide has been investigated through 19F NMR and 1H NMR experiments. The CF3 group in the surfactant gives two kinds of 19F NMR signals corresponding to the monomer and micelle states, indicating slow surfactant exchange on NMR time scale. The lifetime (taumic) of micelle, estimated by line shape analysis of the signals, is 2.0 ms at cmc, 102 to 103 times longer than that of general surfactant micelles. Pulsed-gradient spin-echo (PGSE) experiments show that the hybrid surfactant forms considerably small micelles with a hydrodynamic radius of 0.6 nm. In contrast, at a higher concentration where no slow surfactant exchange is observed, the micelle radius increases to 1.1 nm. The interdigitation between the surfactant molecules in the micelle will contribute to the unusually long lifetime, in other words, slow surfactant exchange on the NMR time scale.
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Affiliation(s)
- Yukishige Kondo
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, and Institute of Colloid and Interface Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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Preuschen J, Rottstegge J, Spiess H. Structure and dynamics of polymer colloidal systems from 1H- and 19F-NMR. Colloids Surf A Physicochem Eng Asp 1999. [DOI: 10.1016/s0927-7757(99)00135-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Preuschen J, Menchen S, Winnik MA, Heuer A, Spiess HW. Aggregation Behavior of a Symmetric, Fluorinated, Telechelic Polymer System Studied by 19F NMR Relaxation. Macromolecules 1999. [DOI: 10.1021/ma9818735] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Preuschen
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany, Applied Biosystems Division, Perkin-Elmer Corporation, 850 Lincoln Centre Drive, Foster City, California 94404, and Department of Chemistry, University of Toronto, Toronto, Canada, M5S 3H6
| | - S. Menchen
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany, Applied Biosystems Division, Perkin-Elmer Corporation, 850 Lincoln Centre Drive, Foster City, California 94404, and Department of Chemistry, University of Toronto, Toronto, Canada, M5S 3H6
| | - M. A. Winnik
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany, Applied Biosystems Division, Perkin-Elmer Corporation, 850 Lincoln Centre Drive, Foster City, California 94404, and Department of Chemistry, University of Toronto, Toronto, Canada, M5S 3H6
| | - A. Heuer
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany, Applied Biosystems Division, Perkin-Elmer Corporation, 850 Lincoln Centre Drive, Foster City, California 94404, and Department of Chemistry, University of Toronto, Toronto, Canada, M5S 3H6
| | - H. W. Spiess
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany, Applied Biosystems Division, Perkin-Elmer Corporation, 850 Lincoln Centre Drive, Foster City, California 94404, and Department of Chemistry, University of Toronto, Toronto, Canada, M5S 3H6
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19
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A 19F NMR investigation of inverse micellization of ammonium perfluoro carboxylates in nonaqueous solvents. J Colloid Interface Sci 1991. [DOI: 10.1016/0021-9797(91)90118-r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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