1
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Singh SK, Bu W, Sun P, Paige MF. Mixing in Langmuir Monolayers: Perfluorotetradecanoic Acid and a Gemini Surfactant without a Linker. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16503-16512. [PMID: 37931181 DOI: 10.1021/acs.langmuir.3c02452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
A recently reported anionic gemini surfactant, a member of the so-called "gemini without a linker" family, has recently been reported to form closely packed crystalline monolayers at the air-water interface. In this work, the impact on monolayer properties of the compound, C18-0-C18, that result from its mixing with a benchmark perfluorinated surfactant, perfluorotetradecanoic acid (PF), is explored. The films exhibit nonideal mixing, as determined by surface pressure-area (π-A) isotherms and surface potential measurements, and phase-separation between the two components was observed by the direct visualization of the monolayers, and grazing-incident X-ray diffraction at the air-water interface. The pure and mixed films follow similar trends in the order of C18-0-C18 < PF < χPF = 0.50 mixed films for both their extent of hysteresis and their stability at the air-water interface. Further, crystallographic data for the mixed film emerge as a simple combination of distinct diffraction patterns characteristic of both the individual components, consistent with the other findings reported here and thus clarify the intermolecular behavior of the binary mixture at the surface.
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Affiliation(s)
- Srikant Kumar Singh
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Wei Bu
- NSF's ChemMatCARS, Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Pan Sun
- NSF's ChemMatCARS, Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Matthew F Paige
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
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2
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Yeboah A, Muhammad S, Yan D, Singh SK, Moreno B, Paige MF. Multilayers in mixed perfluorocarbon-hydrocarbon surfactant films: Yes or no? Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Eftaiha AF, Qaroush AK, Abo-Shunnar AS, Hammad SB, Assaf KI, Al-Qaisi FM, Paige MF. Interfacial Behavior of Modified Nicotinic Acid as Conventional/Gemini Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8524-8533. [PMID: 35775397 DOI: 10.1021/acs.langmuir.2c00596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We report the synthesis and monolayer properties of conventional and gemini surfactants composed of nicotinic acid-based head groups with an emphasis on assessing how chemical structures affect the behavior of monolayers. A combination of Brewster angle microscopy and atomic force microscopy showed that pure hexadecyl nicotinate formed rippled strands in monolayers, and the gemini correspondents with either flexible or rigid organic linkers resulted in lobed-compact domains, which provides a simple method for patterning air-water and solid-air interfaces. The structural differences between conventional and gemini nicotinic acid-based surfactants could be explained by the interplay between line tension (that favors the formation of circular domains), balanced by dipole-dipole repulsion interaction between headgroups, which promotes extended domains. Miscibility and morphology studies of the modified nicotinic acid surfactants with palmitic acid demonstrated that the properties of mixed films can be controlled by the structure of the former. Excess Gibbs free energies of mixing indicated that the mixed films were less stable than the pure monolayers, and the positive deviations from ideality were the largest in the case of gemini surfactants.
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Affiliation(s)
- Ala'a F Eftaiha
- Department of Chemistry, Faculty of Science, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan
| | - Abdussalam K Qaroush
- Department of Chemistry, Faculty of Science, The University of Jordan, Amman 11942, Jordan
| | - Ahmad S Abo-Shunnar
- Department of Chemistry, Faculty of Science, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan
| | - Suhad B Hammad
- Department of Chemistry, Faculty of Science, The University of Jordan, Amman 11942, Jordan
| | - Khaleel I Assaf
- Department of Chemistry, Faculty of Science, Al-Balqa Applied University, Al-Salt 19117, Jordan
| | - Feda'a M Al-Qaisi
- Department of Chemistry, Faculty of Science, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan
| | - Matthew F Paige
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada
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4
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Fluorinated surfactants: A review on recent progress on synthesis and oilfield applications. Adv Colloid Interface Sci 2022; 303:102634. [PMID: 35305443 DOI: 10.1016/j.cis.2022.102634] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 02/28/2022] [Accepted: 02/28/2022] [Indexed: 12/30/2022]
Abstract
The selection of appropriate chemicals and the synthetic method plays an important role in oilfield application. The objectives of this study are to describe the various synthetic route for the preparation of fluorinated surfactants and highlight their oilfield applications. Fluorinated surfactants are the type of surfactants where the hydrophobic tail is either partially fluorinated or replaced totally with fluorine molecules. Fluorinated surfactants have distinct properties compared to corresponding hydrocarbon surfactants such as lower surface tension, better efficiency in lowering the interfacial tension, both oleophobic and hydrophobic nature, high thermal stability, and better chemical tolerance. These properties make them a material of choice for several applications which include but are not limited to fire-fighting, household items, foaming, coating, and paints. Despite these attractive properties, environmental concerns associated with fluorinated surfactants is a major hurdle in extending the application of such surfactants. This review discusses the various synthetic routes for the synthesis of different classes of surfactants such as cationic, anionic, non-ionic, and zwitterionic surfactants. The fundamental surface/interface properties of the synthesized surfactants are also highlighted. In addition, the review highlights the application of fluorinated surfactants in the oil & gas industry.
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Zhou Y, Jin Y, Shen Y, Zhou R, Shi L, Yao Z. A simple strategy to improve surface activity and wettability of anionic hydrocarbon and tri-block nonionic short-chain fluorocarbon surfactant mixtures. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Yan C, Paige MF. Pattern Formation in Phase-Separated Langmuir and Langmuir Monolayer Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:8357-8369. [PMID: 34236880 DOI: 10.1021/acs.langmuir.1c00642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Mixed monolayer films comprising hydrogenated and fluorinated surfactants can undergo phase separation to produce interfaces with diverse structures at the micrometer and nanometer scales. This review discusses our progress over the past decade to probe the relationship that exists between the molecular structure of the surfactants that comprise the films and the overall patterns formed in the monolayers. We review two main classes of mixed perfluorocarbon-hydrocarbon surfactant systems, including fatty acids and a recently developed family of EDTA-based gemini surfactants. In addition to summarizing the state-of-the-art of this field, the key scientific questions and relationships that require further elucidation are discussed, along with directions for continuing research into this fascinating area of research.
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Affiliation(s)
- Ci Yan
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Matthew F Paige
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
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Zhou Y, Shen Y, Shi L, Jin Y, Lai S, Tang Y. Synthesis, characterization and properties of novel nonionic hydrocarbon/fluorocarbon hybrid surfactants containing a short fluoroalkyl chain. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1930032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yutang Zhou
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, P. R. China
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu, P. R. China
| | - Yichao Shen
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, P. R. China
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu, P. R. China
| | - Liangjie Shi
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, P. R. China
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu, P. R. China
| | - Yong Jin
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, P. R. China
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu, P. R. China
| | - Shuangquan Lai
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, P. R. China
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu, P. R. China
| | - Yujia Tang
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, P. R. China
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu, P. R. China
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Peng YY, Liao YF, Gan W, Tong QX, Yuan QH. Hydroxyl group modifies aggregation behavior of a non-ionic hydro-fluorocarbon hybrid surfactant by disrupting interfacial water. CHINESE J CHEM PHYS 2020. [DOI: 10.1063/1674-0068/cjcp2006092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ying-ying Peng
- Flexible Printed Electronics Technology Center, and School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
- Department of Chemistry, and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Shantou 515063, China
| | - Yi-fan Liao
- Department of Chemistry, and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Shantou 515063, China
| | - Wei Gan
- Flexible Printed Electronics Technology Center, and School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Qing-xiao Tong
- State Key Laboratory of Advanced Welding and Joining, and School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Qun-hui Yuan
- State Key Laboratory of Advanced Welding and Joining, and School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
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Nakahara H, Krafft MP, Shibata O. How Self-Assembled Nanodomains Can Impact the Organization of a Phospholipid Monolayer-Flower-Like Arrays. Chemphyschem 2020; 21:1966-1970. [PMID: 32710449 DOI: 10.1002/cphc.202000496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/10/2020] [Indexed: 11/11/2022]
Abstract
We found that monolayers of dipalmitoylphosphatidylcholine (DPPC) and semi-fluorinated tetrablock di(F10H16) self-assemble to form a new type of large, complex flower-like patterns on the surface of water and on solid substrates. The hierarchical organization of these unusual self-assemblies was investigated using compression and surface potential isotherms, in situ fluorescence and Brewster angle microscopies, and atomic force microscopy after transfer.
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Affiliation(s)
- Hiromichi Nakahara
- Department of Industrial Pharmacy, Daiichi University of Pharmacy, 22-1 Tamagawa-cho, Minami-ku Fukuoka, 815-8511, Japan
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS), University of Strasbourg, 67034, Strasbourg, France
| | - Osamu Shibata
- Department of Biophysical Chemistry, Nagasaki International University, 2825-7 Huis Ten Bosch, Sasebo, Nagasaki, 859-3298, Japan
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Rehman J, Sowah-Kuma D, Stevens AL, Bu W, Paige MF. Immiscible Anionic Gemini Surfactant-Perfluorinated Fatty Acid Langmuir Monolayer Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10551-10560. [PMID: 31309841 DOI: 10.1021/acs.langmuir.9b01554] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A new member of the N,N,N',N'-dialkyl-N,N'-diacetate ethylenediamine family of anionic gemini surfactants has been synthesized, and its miscibility with the model perfluorocarbon, perfluorotetradecanoic acid (PF), has been investigated in monolayer films at the air-water interface. Thermodynamics of mixing and the accompanying changes in the mixed film structure have been probed using a combination of compression isotherm measurements supported by Brewster angle microscope imaging and X-ray scattering measurements, and results have been compared with those collected for a previously studied, shorter tail chain variant of the surfactant. Thermodynamic measurements showed that the gemini surfactant and perfluorotetradecanoic acid were immiscible, with weak repulsive interactions, manifesting as small positive deviations from ideal mixing, observed between the two film components. Films were highly textured, with micrometer-scale, phase-separated domains readily detectable. Grazing incidence X-ray diffraction measurements showed that the gemini surfactant was disordered in the monolayers, whereas the perfluorocarbon formed discrete crystallites in the disordered matrix. Despite the small deviations from ideal mixing detected in the thermodynamic measurements, the X-ray measurements indicated that the presence of the gemini perturbs the PF crystal lattice from that of pure PF. Finally, X-ray reflectivity measurements showed that the addition of equimolar PF to the gemini monolayer induces a significant increase in the nominal head group thickness of the film, suggesting that interactions between the two surfactants can lead to structural rearrangements of gemini's head group near to the water surface.
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Affiliation(s)
- Jeveria Rehman
- Department of Chemistry, 110 Science Place , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5C9 , Canada
| | - David Sowah-Kuma
- Department of Chemistry, 110 Science Place , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5C9 , Canada
| | - Amy L Stevens
- Department of Chemistry, 110 Science Place , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5C9 , Canada
| | - Wei Bu
- NSF's ChemMatCARS , The University of Chicago , Chicago , Illinois 60637 , United States
| | - Matthew F Paige
- Department of Chemistry, 110 Science Place , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5C9 , Canada
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11
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Soleimaninejad H, Ghiggino KP, Smith TA, Paige MF. Fluorescence anisotropy imaging of a polydiacetylene photopolymer film. CAN J CHEM 2019. [DOI: 10.1139/cjc-2018-0360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
UV-illumination of phase-separated surfactant films prepared from mixtures of photopolymerizable 10,12-pentacosadiynoic acid and perfluorotetradecanoic acid results in the formation of fluorescent polydiacetylene fibers and aggregates. In this work, the orientation of polymer strands that comprise the resulting photopolymer structures has been probed using fluorescence anisotropy imaging in combination with defocused single-molecule fluorescence imaging. Imaging experiments indicate the presence of significant fiber-to-fiber heterogeneity, as well as anisotropy within each fiber (or aggregate), with both of these properties changing as a function of film preparation conditions. This anisotropy can be attributed to various alignments of the constituent polymer strands that comprise the larger fibers and aggregates. Intriguingly, when using defocused imaging, fiber images consisted of a series of discrete “doughnut” fluorescence emission patterns, which exhibited intermittent on–off blinking behavior; both of these properties are characteristic of individual emission transition dipoles (single molecules). Further, all of the individual emission transition dipoles had a uniform orientation with respect to the axis of the fiber, indicating a common orientation of discrete emitters in the larger polymer fiber. The implications of these results for future studies of the electronic properties of conjugated polymers in larger macroscopic systems are noted.
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Affiliation(s)
- Hamid Soleimaninejad
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Kenneth P. Ghiggino
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Trevor A. Smith
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Matthew F. Paige
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada
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12
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Viada B, Cámara CI, Yudi LM. Destabilizing effect of perfluorodecanoic acid on simple membrane models. SOFT MATTER 2019; 15:2447-2462. [PMID: 30801603 DOI: 10.1039/c8sm02301h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Perfluoroalkyl acids (PFA) are amphiphilic surfactants widely used in industry with several commercial applications. An important feature of these compounds is their non-biodegradability and their tendency to bio-accumulate in the environment, which has led to these compounds being considered among the most persistent pollutants worldwide. Many studies have provided evidence of their toxic effect on humans and wildlife. For this reason, more and more efforts have been made to better understand the effect of these compounds on living organisms. The aim of the present study is to understand how the electrostatic interactions and film compactness of biological membrane models modulate their interaction with PFA, more specifically with perfluorodecanoic acid (PFD). Langmuir isotherms and Brewster angle microscopy (BAM) are used to evaluate the effect of PFD on lipid membrane models (air/water monolayers and vesicles), analyzing the behavior of PFD : lipid mixtures. The lipids used in this study are distearoyl phosphatidic acid (DSPA), dilauroyl phosphatidic acid (DLPA) and distearoyl phosphatidylethanolamine (DSPE). PFD induces an increase in the mean molecular area per lipid in monolayers, mainly at lower surface pressures. BAM images demonstrate that PFD mixes with DLPA, inducing a decrease in gray level, while it forms a non-miscible mixture with DSPA, segregating PFD domains. Insertion studies of PFD within monolayers and dynamic light scattering experiments demonstrate that PFD can penetrate into monolayers and bilayers above 30 mN m-1, which is the lateral pressure value accepted for a cellular bilayer.
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Affiliation(s)
- Benjamin Viada
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Córdoba, Argentina.
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Sowah-Kuma D, Paige MF. The influence of surfactant head group on miscibility in mixed hydrocarbon-perfluorocarbon monolayers. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Sowah-Kuma D, Fransishyn KM, Cayabyab C, Martynowycz MW, Kuzmenko I, Paige MF. Molecular-Level Structure and Packing in Phase-Separated Arachidic Acid-Perfluorotetradecanoic Acid Monolayer Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10673-10683. [PMID: 30102043 DOI: 10.1021/acs.langmuir.8b02291] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Synchrotron-based X-ray scattering measurements of phase-separated surfactant monolayers at the air-water interface provide molecular-level structural information about the packing and ordering of film components. In this work, grazing incidence X-ray diffraction (GIXD) and X-ray reflectivity (XR) measurements were used to collect crystallographic structural information for binary mixed monolayers of arachidic acid (AA, C19H39COOH) with perfluorotetradecanoic acid (PA, C13F27COOH), a system that has previously been investigated using a variety of thermodynamic and micron-scale structural characterization methods. GIXD measurements at surface pressures of π = 5, 15, and 30 mN/m indicated that AA in pure and mixed films forms a rectangular lattice at π = 5 and 15 mN/m but a hexagonal lattice at π = 30 mN/m. PA formed hexagonal lattices under all conditions, with films being highly ordered and crystalline (as determined by Bragg peak width) at even the lowest surface pressures investigated. Phase separation occurred for all mixed monolayer film compositions and surface pressures, manifesting as diffraction peaks characteristic of the individual components appearing at different in-plane scattering vector qxy. For both pure and mixed films, the molecular tilt angle of the AA hydrocarbon chain toward the nearest-neighbor was substantial at low pressures but decreased with increasing pressure. The PA fluorocarbon chain showed negligible molecular tilt under all conditions, and was oriented normal to the subphase surface regardless of surface pressure or the presence of AA in the films. In all cases, the two components in the mixed film behaved entirely independently of film composition, which is exactly the expected result for a fully phase-separated, immiscible system. XR measurements of film thickness at the air-water interface supported these results; overall film thickness approached the calculated ideal surfactant tail lengths with increasing surface pressure, indicating nearly normal oriented surfactants. The overall surfactant packing and crystallographic features of the mixed monolayers are discussed in terms of the lipophobic nature of the perfluorinated surfactant as well as in context of thermodynamic miscibility and domain structure formation reported elsewhere in the literature for these mixed monolayer systems.
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Affiliation(s)
- David Sowah-Kuma
- Department of Chemistry , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5A2 , Canada
| | - Kyle M Fransishyn
- Department of Chemistry , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5A2 , Canada
| | - Chelsea Cayabyab
- Department of Chemistry , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5A2 , Canada
| | - Michael W Martynowycz
- Advanced Photon Source , Argonne National Lab , Lemont , Illinois 60439 , United States
| | - Ivan Kuzmenko
- Advanced Photon Source , Argonne National Lab , Lemont , Illinois 60439 , United States
| | - Matthew F Paige
- Department of Chemistry , University of Saskatchewan , Saskatoon , Saskatchewan S7N 5A2 , Canada
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Liu X, Riess JG, Krafft MP. Self-Organization of Semifluorinated Alkanes and Related Compounds at Interfaces: Thin Films, Surface Domains and Two-Dimensional Spherulites. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20170431] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xianhe Liu
- Institut Charles Sadron (CNRS) University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Jean G. Riess
- Harangoutte Institute, 68160 Sainte Croix-aux-Mines, France
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS) University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
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Thermodynamic Behaviour of Mixed Films of an Unsaturated and a Saturated Polar Lipid. (Oleic Acid-Stearic Acid and POPC-DPPC). COLLOIDS AND INTERFACES 2018. [DOI: 10.3390/colloids2020017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Zhang C, Yang L, Zhao K, Chen Z, Xiao JX. Effect of counterions on anionic fluorocarbon surfactant micelles by dielectric spectroscopy. NEW J CHEM 2018. [DOI: 10.1039/c8nj02524j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of counterions on dielectric behaviors of anionic fluorocarbon surfactants solutions was insighted in the frequency of 40–110 MHz. The dielectric increments Δεof all the surfactants can be divided into different groups, the reason was analyzed and the average radiusR̄was calculated according to Grosse's model, which confirmed the reliability of dielectric analysis, and the structure of micelles was proposed as the figure.
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Affiliation(s)
- CanCan Zhang
- College of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - LiKun Yang
- College of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - KongShuang Zhao
- College of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Zhen Chen
- School of Natural Science
- Anhui Agricultural University
- Hefei 230036
- China
| | - Jin-Xin Xiao
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
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